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Recruitment

Recruitment for Postdoctoral Fellow 2023 (Fixed-term researcher)
Recruitment Field for Postdoctoral Fellow of JAEA

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No.	1
Theme	Research and development on severe accident phenomena regarding in-vessel and ex-vessel degradation
Department	Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Sector of Fukushima Research and Development
Section	Core Status Evaluation Group, Fuel Debris Research and Analysis Division
Location	2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan. Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Yuji NAGAE Tel: +81-70-1390-6997 E-mail: nagae.yuji[at]jaea.go.jp
Summary	Internal inspections by TEPCO and componet analysis of samplling materials will has been going to understand internal status of debris's characters and structural degradation. Such information on would be updated, but be limited. Additional information using analytical and experimenta could be proper manner. Regarding formation of debris and degradation behavior of structure in the accident. Objetive in the study is to evaluate its through doing calculations and small-scaled experiments.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Chemistry Material Mechanics Computer and Information

No.	2
Theme	Research and development on remote operation support technology and systems
Department	Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Sector of Fukushima Research and Development
Section	Spatial Information Creation and Control System Research Group, Remote System and Sensing Technology Division,
Location	1-22, Nakamaru, Yamadaoka, Narahamachi, Futaba, Fukushima, JAPAN, 979-0513
ContactPerson *Replace [at] with @	Kuniaki KAWABATA Tel: +81-240-26-1058 E-mail: kawabata.kuniaki[at]jaea.go.jp
Summary	Spatial Information Creation and Control System Research Group are currently developing technologies for generating and presenting workspace information based on sensor data acquired at decommissioning sites, as part of R&D of support technologies and systems to promote safe and steady remote operations in decommissioning task. This is a call to recruit a researcher in the technologies for control, motion planning, safety confirmation, etc. for remote operation of robots in a virtual workspace constructed based on sensor data obtained in the workspace, as well as communication and database technologies for acquiring and storing sensor data. The ideal candidate should be engaged in advanced research fields related to especially information processing, artificial intelligence, robotics, and communication technology. Experience in software development using programming languages such as C++, python, etc. and Robot Operating System is desirable
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Computer and Information Robotics Measurements and Instruments Electricity and Electronics

No.	3
Theme	Research and development of simulation models in interface capturing multi-phase CFD codes
Department	Center for Computational Science and e-Systems (CCSE)
Section	Computer Science Reseach and Development Office
Location	Kashiwa, Chiba
ContactPerson *Replace [at] with @	Kenta Sugihara Tel: +81-80-9183-8174 E-mail: sugihara.kenta[at]jaea.go.jp
Summary	CCSE is promoting research and development of interface capturing multi-phase CFD codes for investigating the safety evaluation of boiling water reactors and the migration behavior of molten materials in reactors during severe accidents. In the above analysis, it is important to develop an interface model, that accurately expresses phase changes such as boiling/condensation of fluids, melting/solidification of solids, and interfaces between different phases, while taking account of the physics properties of the target materials. Applicants will address this research theme using supercomputers, and improve the analysis code for thermal-hydraulics in nuclear reactors.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Mechanics Applied Physics Computer and Information

No.	4
Theme	Research and development of data assimilation technology in large scale turbulence simulations
Department	Center for Computational Science and e-Systems (CCSE)
Section	Computer Science Reseach and Development Office
Location	Kashiwa, Chiba
ContactPerson *Replace [at] with @	Naoyuki Onodera Tel: +81-80-9435-1286 E-mail: onodera.naoyuki[at]jaea.go.jp
Summary	CCSE is promoting research and development of data assimilation technology that links observation and analysis to improve the accuracy of wind analysis such as plume dispersion analysis. In the above analyses, it is importnat to develop different levels of data assimilation techniques, from direct modification of the velocity field based on observational data to optimization of highly uncertain model parameters, while taking account of the spatio-temporal scale of observation and analysis and the computational cost of data assimilation. Applicants will address this research theme using supercomputers, and improve the plume dispersion analysis code.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Mechanics Applied Physics Geo and Environemtal Sciences Computer and Information

No.	5
Theme	Research and development of VR/MR visualization systems
Department	Center for Computational Science and e-Systems (CCSE)
Section	Computer Science Reseach and Development Office
Location	Kashiwa, Chiba
ContactPerson *Replace [at] with @	Takuma Kawamura Tel: +81-70-1379-4960 E-mail: kawamura.takuma[at]jaea.go.jp
Summary	CCSE is promoting research and development of technology for visualizing and analyzing large-scale data generated from simulations and observations using VR/MR technology. In the above technologies, it is important to develop high-speed visualization technology in a virtual space projected onto a head-mounted display, a more effective visualization method that combines the real world and virtual space, and a technology that allows multiple users to share a virtual space and analyze data interactively, while taking account of practival application needs. Applicants will address this research theme, and improve the VR/MR visualization system VR-PBVR, that is currently under development at CCSE.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Computer and Information Mathematics

No.	6
Theme	Resarch and development of matrix solver library
Department	Center for Computational Science and e-Systems (CCSE)
Section	Computer Science Reseach and Development Office
Location	Kashiwa, Chiba
ContactPerson *Replace [at] with @	Yasuhiro Idomura Tel: +81-70-1470-5237 E-mail: idomura.yasuhiro[at]jaea.go.jp
Summary	CCSE is promoting research and development of a matrix solver library that enables efficient processing of nuclear analysis codes on supercomputers with various architectures, including GPU-based supercomputers. In the above solvers, it is important to develop algorithms that reduce data transfer between computing nodes and from memory, preconditioning methods that match the characteristics of the problem, and highly portable implementations that can extract performance from processors with different architectures, based on knowledge of state-of-the-art algorithms and compiler technology. Applicants will address this research theme on state-of-the-art supercomputers, and work to advance the matrix solver library PARCEL, that is currently under development at CCSE.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Computer and Information Mathematics

No.	7
Theme	R&D of techniques for matelials simulation utilizing first-principles calculation and machine learning
Department	Center for Computer Science and e-Systems
Section	Simulation Technology Research and Development Office
Location	Kashiwa, Chiba
ContactPerson *Replace [at] with @	Mitsuhiro Itakura Tel: +81-80-9668-6997 E-mail: itakura.mitsuhiro[at]jaea.go.jp
Summary	CCSE is conducting R&D of atomisrtic simulations of nuclear materials to evaluae their properties using first-principles calculations, atomistic simulations of radioactive elements in the environment, molecular dynamics simulations utilizing machine-learning techniques, and automatic gathering of training data utilizing self-learning Monte Carlo method, to promote digital transformation of R&D in nuclear engineering. Applicant will conduct research on thermal properties of MOX fuel, irratiation and liquid-metal embrittlement of ferrite and austenite steel, behaviour of radioactive elements in environment, development of machine-learning potential for materials with more tha four elemets. Applicant is also supposed to communicate with researchers (especially experimentalists ) of JAEA and other institutes closely to share research problems and issues.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Computer and Information Physics Material Geo and Environemtal Sciences Mechanics

No.	8
Theme	R&D conserning Fukushima environmental remediation utilizing techniques such as sparse-modeling and air-dose simulation
Department	Center for Computer Science and e-Systems
Section	Simulation Technology Research and Development Office
Location	Kashiwa, Chiba
ContactPerson *Replace [at] with @	Mitsuhiro Itakura Tel: +81-80-9668-6997 E-mail: itakura.mitsuhiro[at]jaea.go.jp
Summary	CCSE is conducting R&D of Fukushima environmental remediation issues, such as sparse-modeling to locate radiation source from air-dose distribution, and air-dose calculation utilizing detailed model of terrain and buildings. Applicant will conduct research on estimation of radiation source distribution inside Fukushima Daiichi NPP, and detailed estimation of air-dose distribution around and inside buildings in Fukushima area. Applicant is also supposed to communicate with researchers (especially experimentalists ) of JAEA and other institutes closely to share research problems and issues.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Computer and Information Geo and Environemtal Sciences Biology Radiation Physics

No.	9
Theme	Study on Materials Degradation Evaluation for Nuclear Rector Components
Department	Nuclear Safety Research Center
Section	Ageing Management Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Yasuhiro Chimi Tel: +81-29-282-5044 E-mail: chimi.yasuhiro[at]jaea.go.jp
Summary	Long-term operation of existing light water reactors is required from the viewpoint of strengthening domestic energy security and sustaining economic base. In order to ensure the structural integrity of safety-related components in the light water reactors during long-term operation, the improvement of accuracy of the materials degradation prediction methods should be performed based on the latest knowledge on the materials degradation mechanisms and assessment methods. In this study, for investigating the effects of peculiar environments to the reactors such as neutron irradiation, high temperature and high pressure water on the materials degradation, and improving the assessment methods for structural integrity and materials degradation on pressure boundary components such as the reactor pressure vessel, etc., we will perform the experimental investigations on microstructure and fracture toughness of irradiated/unirradiated materials, initiation and propagation of the stress corrosion cracking in high temperature and high pressure water environments, and non-destructive inspection, and the analytical investigations based on the finite element analysis.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Mechanics Material Measurements and Instruments Computer and Information

No.	10
Theme	Experimental and analytical studies on the fuel behavior under accident conditions of light-water-reactor
Department	Nuclear Safety Research Center
Section	Fuel Safety Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Yutaka Udagawa Tel: +81-29-282-6230 E-mail: udagawa.yutaka[at]jaea.go.jp
Summary	The objective of this study is to develop and/or improve simulation tools and related models for safety evaluation on fuel behaviors primarily under accident conditions. The following or related studies will be carried out with both analytical and/or experimental approaches: * Behaviors of accident torelant fuels (ATF): particularly Cr-coated Zr-alloy cladding and FeCrAl cladding * Improvement of simulation techniques: probabilistic models for fuel performance code, coupling of fuel performance code with thermal-hydraulic calculation codes and sevear accident codes, fuel melt progression models under high temperature conditions, etc. * Behaviors of high burnup fuels under accident conditions: clad deformation, rupture, hydride absorption, fuel pellet cracking, fuel axial relocation inside a fuel rod, fuel pulverization, fuel dispersal, etc. * Evaluation of core coolability during and after accidents
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Mechanics Material Physics Applied Physics Computer and Information Mathematics

No.	11
Theme	Study on safety assessment of decommissioning of nuclear facilities
Department	Nuclear Safety Research Center
Section	Waste and Environmental Safety Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Taro Shimada Tel: +81-29-284-3714 E-mail: shimada.taro[at]jaea.go.jp
Summary	In the decommissioning of nuclear facilities, it is required to evaluate the exposure doses of the public and workers at each stage of planning and completion, the doses should be comfirmed to be compliance with dose criteria. In addition, the IAEA recommendation mentions minimizing the amount of radioactive waste generated during decommissioning. Furthermore, it is also necessary to appropriately manage temporal and spatial changes of risk depending on the progress of dismantling works. Therefore, this study focuses on the sophistication of methods for evaluating the validity of the planning and implementation of decommissioning work for nuclear installations and the completion of decommissioning as follows. - Development of modeling and evaluation methods for optimizing indicators such as the amount of radioactive waste generated, reduction of exposure dose of workers, and cost - Research on evaluation of exposure risks changing according to the progress of dismantling works of the facilities - Development of evaluation methods for radioactive contamination distribution within the site, evaluation methods for nuclide migration and radiation exposure reflecting site characteristics and distribution of radioactivity contamination
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Radiation Computer and Information

No.	12
Theme	Study on improvement of severe accident evaluation techniques
Department	Nuclear Safety Research Center
Section	Severe Accident Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Yasuteru Sibamoto Tel: +81-29-282-5263 E-mail: sibamoto.yasuteru[at]jaea.go.jp
Summary	The research and development will be performed to evaluate the plant response, accident progression, and migration/release behavior of radionuclide during severe accidents, including the effects of countermeasures by accident management. Specifically, the R&D is related to the followings - Source term evaluation of the accident at the Fukushima Daiichi Nuclear Power Station using the severe accident analysis code THALES2/KICHE. - Evaluation of molten core coolability using mechanistic molten core/coolant interaction analysis code JASMINE. - Evaluation of hydrogen transport and combustion in containment vessel or reactor building using CFD code.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Chemistry Mechanics Geo and Environemtal Sciences Computer and Information Other

No.	13
Theme	Study on analytical techniques for individual particles containing nuclear materials in environmental samples
Department	Nuclear Safety Research Center
Section	Research Group for Safeguards Analytical Chemisty
Location	Tokai
ContactPerson *Replace [at] with @	Yutaka Miyamoto Tel: +81-29-282-5544 E-mail: miyamoto.yutaka[at]jaea.go.jp
Summary	Analysis of ultra-trace nuclear materials in environmental samples taken at nuclear facilities in the world is performed to reveal nuclear activities, which is important for nuclear safeguards. In this study, ultra-trace analytical techniques for measuring isotopic composition and/or chemical states of uranium and/or plutonium in a nuclear particle are developed using secondary ion mass spectrometer and micro-Raman spectrometer.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Chemistry Applied Chemistry

No.	14
Theme	Study on the methodology of seismic safety and structural integrity assessment for nuclear reactor components
Department	Nuclear Safety Research Center
Section	Seismic Safety and Structural Integrity Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Akemi Nishida Tel: +81-29-282-5324 E-mail: nishida.akemi[at]jaea.go.jp
Summary	Due to the long-term operation of some domestic nuclear power plants, the occurrence of the earthquakes beyond the designed seismic ground motion, and the regulation considering projectiles colliding in new regulatory standards, developing the methodologies of structural integrity assessments for the building, reactor components, and piping concerning seismic and impact loadings and age related degradation mechanisms such as neutron irradiation embrittlement, stress corrosion cracking and so on is of great importance. In this theme, one of the following related researches will be conducted. - Advanced seismic safety assessment research including development of three-dimensional evaluation models of nuclear facility buildings, components and piping systems, and numerical simulation considering nonlinear mechanical properties, and fragility evaluation method for seismic risk assessment, - Research and development on impact assessment methods for buildings and internal components due to projectile collision, - Advanced structural integrity assessment research for important nuclear components, such as failure estimation, crack propagation or weld residual stress evaluation, on the basis of numerical simulation, material testing, and fracture testing and so on.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Mechanics Architectural and Civil Engineering Material Physics Applied Physics Measurements and Instruments Computer and Information

No.	15
Theme	Experimental and analytical study on thermohydraulic safety of light water reactor
Department	Nuclear Safety Research Center
Section	Thermohydraulic Safety Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Yasuteru Sibamoto Tel: +81-29-282-5263 E-mail: sibamoto.yasuteru[at]jaea.go.jp
Summary	This research focuses on thermal hydraulic (TH) phenomena occurring in the reactor and the containment of nuclear power plant during an accident before and after core damage. The research topics include core heat transfer, system response of PWR, the related two-phase flow for before core damage, and containment TH as in containment cooling, hydrogen transport, combustion, and aerosol migration for sever accident. The analytical models used for CFD and BE codes are developed to improve evaluation techniques. In addition, experiments will be conducted using large and small scale facilitieis if necessary,
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Mechanics Measurements and Instruments Computer and Information

No.	16
Theme	Study on methodology of accident consequence analysis and its application to the protection of people living in affected areas after a Nuclear Accident
Department	Nuclear Safety Research Cener
Section	Risk Analysis Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Shogo Takahara Tel: +81-29-282-6139 E-mail: takahara.shogo[at]jaea.go.jp
Summary	The aim of this study is to develop the assessment methods of consequences due to a Nuclear Accident, and also application to the protection of people living in affected areas after the accident. To achieve this aim, one of the following tasks or other related tasks will be made： ①Development of accident consequence assessement methods including radiation dose assessement and social-econical impacts analysis; ②Development of calculation codes which are implemented latest methods related to consequence assessments, and of a level 3 PRA code OSCAAR; ③Optimization of nuclear emergency preparedness by using a level 3PRA code OSCAAR; ④Research on public understanding and behavior, and public communication in nuclear emergency preparedness.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Geo and Environemtal Sciences Chemistry Mathematics Radiation Other

No.	17
Theme	Research on the optimization of the criticality experiments for nuclear data evaluation in order to improve the reliability of the criticality safety assessment
Department	Nuclear Safety Research Center
Section	Criticality Safety Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Kenya Suyama Tel: +81-90-9803-7921 E-mail: suyama.kenya[at]jaea.go.jp
Summary	Improvement of evaluated nuclear data has been continuously carried out to improve the accuracy and reliability of nuclear calculations. Recently in Japan, JENDL-5 has been released with revision of the thermal neutron scattering law which have not been revised or reviwed for a long period of time. JAEA has a plan to obtain the integral experimental data using a new critical assembly called "STACY." In this study, we will construct the optimal experimental cores to confirm the nuclear data required to be confirmed or improved by various approaches, and we acquire the data, and promote the validation of the evaluated nuclear data directly lead to the accuracy and reliability of the criticality safety assessment.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Computer and Information Applied Physics Mechanics Other

No.	18
Theme	Study on release and transport behavior of radioactive materials in reprocessing plant under severe accident conditions
Department	Nuclear Safety Research Center
Section	Fuel Cycle Safety Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Yuichi Yamane Tel: +81-29-282-6743 E-mail: yamane.yuichi[at]jaea.go.jp
Summary	Newly defined as as severe accidents in fuel reprocessing plant are organic solvent fire in cell as well as boiling and exsiccation of highly-active liquid waste in concentrators. Therefore, establishment of method for evaluating their effect on the public dose and effectiveness of countermeasures for the accidents become an urgent issue. Purposes of this study are 1) acquiring data about release, transport and confinement of radioactive materials under the accident conditions and 2) establishing a simulation code to evaluate the accident evolution with high applicability.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Chemistry Chemical Engineering Computer and Information

No.	19
Theme	Physics of exotic nuclei
Department	Sector of Nuclear Science Research Advanced Science Research Center
Section	Research Group for Exotic Heavy-element Nuclear Science
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Katsuhisa Nishio Tel: +81-29-282-5454 E-mail: nishio.katsuhisa[at]jaea.go.jp
Summary	Experimental and theoretical studies of unstable nuclei and superheavy elements will be prompted. The research topics include nucler structure, nuclear reaction, and nuclear fission for nuclei far from the stable isotopes. In experimental programs, JAEA facilities and/or external facilities will be used to produce exotic nuclei. In theory subjects, nuclear structure, fission and nuclear reaction will be studied by taking advantage of the JAEA supercomputer. (https://asrc.jaea.go.jp/soshiki/gr/HENS-gr/index_e.html)
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Mathematics Radiation Applied Physics Measurements and Instruments Computer and Information Other

No.	20
Theme	Nuclear chemistry of superheavy elements
Department	Sector of Nuclear Science Research Advanced Science Research Center
Section	Research Group for Exotic Heavy-element Nuclear Science
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Tetsuya Sato Tel: +81-29-282-5795 E-mail: sato.tetsuya[at]jaea.go.jp
Summary	The main objective is to understand chemical and atomic properties of superheavy elements (SHEs) placed at the uppermost end of the Periodic Table. This theme will focus on the valence electronic structure of SHEs from the measurements of ionization-energy, electron spin, surface adsorption, ionic radii, redox potentials, molecular formations and so on related to the chemical phenomena of SHEs. The subjects include development of the measuring/analyzing system for the purpose based on an "atom-at-a-time" method. These experiments will be mainly performed at the JAEA Tandem Accelerator Facility. (https://asrc.jaea.go.jp/soshiki/gr/HENS-gr/index_e.html)
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Chemistry Radiation Physics Measurements and Instruments Applied Chemistry Other

No.	21
Theme	Experimental research for hadron and nuclear physics at J-PARC
Department	Sector of Nuclear Science Research Advanced Science Research Center
Section	Research Group for Hadron Nuclear Physics
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Hiroyuki Sako Tel: +81-29-284-3828 E-mail: sako.hiroyuki[at]jaea.go.jp
Summary	The successful candidates will work on hadron nuclear experimental research either at J-PARC Hadron Experimental Facility, J-PARC Heavy-Ion Project (J-PARC-HI), RHIC, or Belle (II), which are promoted by our group.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics

No.	22
Theme	Condensed matter physics of strongly correlated actinide materials
Department	Sector of Nuclear Science Research Advanced Science Research Center
Section	Research group for Strongly Correlated Actinide Science
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Yo Tokunaga Tel: +81-29-284-3525 E-mail: tokunaga.yo[at]jaea.go.jp
Summary	A successful candidate will study experimentally new electronic states including spin-triplet superconductor, topological quantum states, and higher-order or augmented multipole orders, emerging from strongly correlated electrons in actinide and other materials. According to individual themes, research will be carried out using complementary experimental methods such as material development, magnetic/transport properties measurement, nuclear magnetic resonance, neutron scattering, muon spin relaxation, and resonant X-ray diffraction. Experiments will be performed at the laboratory building No. 4, JRR-3, J-PARC MLF and other experiment facilities outside JAEA.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Applied Physics Material Chemistry

No.	23
Theme	Study of spin-related physics in condensed matter systems
Department	Sector of Nuclear Science Research Advanced Science Research Center
Section	Research Group for Spin-energy Science
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Jun'ichi Ieda Tel: +81-29-284-3449 E-mail: ieda.junichi[at]jaea.go.jp
Summary	Our group studies spintronics, magnonics, gyromagnetic effect, strong correlation effect, topological properties, and other physical properties stemming from spin in condensed matter systems both experimentally and theoretically. We welcome a wide range of candidates who are interested in fields related to magnetism and spintronics and who are willing to pursue the physics of spin. For specific research themes, please refer to the publication list (https://asrc.jaea.go.jp/soshiki/gr/spinenergy/publist_idx.html), and inquiries are accepted at any time.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Applied Physics Material Computer and Information

No.	24
Theme	Study on Surface/Interface and Low-Dimensional Materials
Department	Sector of Nuclear Science Research Advanced Science Research Center
Section	Research Group for Surface and Interface Science
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Yuki Fukaya Tel: +81-29-282-6582 E-mail: fukaya.yuki99[at]jaea.go.jp
Summary	The research theme is focused on low-dimensional materials such as surface/interface structures and two-dimensional materials. By using surface and/or solid/liquid interface analysis techniques, atomic arrangements and electronic states of low-dimensional materials are investigated towards the development of new functional materials such as electrode catalysts for fuel cells and carbon recycling and hydrogen functional materials. Molecular beam epitaxy (MBE), chemical vapor deposition (CVD), atomic force microscopy (AFM), scanning tunneling microscopy (STM), Raman spectroscopy, electrochemical analysis, reflection high-energy electron diffraction (RHEED), positron diffraction, photoelectron spectroscopy, and first-principles calculations are available.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Chemistry Material Applied Physics Geo and Environemtal Sciences Applied Chemistry Measurements and Instruments

No.	25
Theme	Research of Material Science by using Advanced Muon Beam
Department	Sector of Nuclear Science Research Advanced Science Research Center
Section	Research Group for Surface and Interface Science
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Wataru　Higemoto Tel: +81-29-284-3873 E-mail: higemoto.wataru[at]jaea.go.jp
Summary	Muon is one of an elemental paeticle and used as a probe of local state inside material. By using muon, which is obatined at J-PARC and other proton accelarator facilities, the candiate advance a material science and develpment of experimental instruments. An experience of muon experiment does not be required.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Material Chemistry Material Applied Physics Applied Chemistry

No.	26
Theme	Theoretical study of many-body quantun systems
Department	Sector of Nuclear Science Research Advanced Science Research Center
Section	Research Group for Advanced Theoretical Physics
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Yutaka Utsuno Tel: +81-29-282-6901 E-mail: utsuno.yutaka[at]jaea.go.jp
Summary	We invite candidates who will conduct theoretical researches of many-body quantum physics in quark, hadron, or nuclear physics, and the related areas beyond energy scale. The candidates are encouraged to strengthen links to experimental studies and condensed-matter (or cold-atom) physics performed in this center, and to carry out interdisciplinary researches.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics

No.	27
Theme	Development of highly durable functional materials
Department	Sector of Nuclear Science Research Advanced Science Research Center
Section	Research Group for Sustainable Functional Materials Sciences
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Kazuya Tanaka Tel: +81-29-284-3518 E-mail: tanaka.kazuya[at]jaea.go.jp
Summary	This theme intends to perform basic and applied reserch on the development of functional (e.g. magnetic, optical, mechanical, and/or electrochemical) materials with high durability/resistivity against harsh conditions (e.g. radiation, heat, corrosion, etc.). Energy storage materials with high environmental-durability is also a potential scope of this theme.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Material Applied Physics Applied Chemistry

No.	28
Theme	Development of a seamless atmospheric dispersion simulation method covering from a local to a global scale
Department	Nuclear Science and Engineering Center
Section	Research Group for Environmental Science
Location	Tokai (Sector of Nuclear Science Reserach)
ContactPerson *Replace [at] with @	Hiromasa Nakayama Tel: +81-29-282-5170 E-mail: nakayama.hiromasa[at]jaea.go.jp
Summary	We have been developing a seamless simulation method for atmospheric dispersion of radioactive materials released from nuclear facility over a range from a local (i.e. up to several kilometers) to a global scale (i.e. from ten kilometers to several thousands of kilometers). In this approach, a micro-scale model based on large-eddy simulation (LES) and a meso-scale model based on numerical weather prediction (NWP) are appropriately combined by considering physical processes and interactions at different scales from turbulence to synoptic and meso-scale. We aim to develop a comprehensive simulation system for atmospheric dispersion over a range from a local to a global scale.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Geo and Environemtal Sciences Radiation Architectural and Civil Engineering Computer and Information

No.	29
Theme	Evaluation of radiation and/or environmental effects on material property
Department	Nuclear Science and Engineering Center
Section	Research Group for Radiation Materials Engineering
Location	Tokai Research and Development Center (Nuclear Science Research Institute)
ContactPerson *Replace [at] with @	Nariaki Okubo Tel: +81-29-282-6212 E-mail: okubo.nariaki[at]jaea.go.jp
Summary	The candidate is expected to elucidate the influence of in-pile irradiation on the property of new type of fuel claddings, which will be used for not only accident tolerant fuel for light water reactor, but also for small modular reactor and for accelerator-driven system. A wide variety of tests such as micrstructural observation, mechanical tests (tensile, hardness measurement etc), high temperature oxidation, and corrosion will be conducted using the cladding materials which were irradiated under various environmental conditions. Based on the experimental data, a correlation between changes in microstructure and mechanical properties in the materials and radiation damage behavior will be evaluated. Through these works, it is expected that synergistic function among environmental factors (irradiation, thermal load, stress, atmosphere etc) influencing on correlation evaluation for those materials will be clarified.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Material Radiation Mechanics Measurements and Instruments Chemistry

No.	30
Theme	Development of a coupled thermal-hydraulics-structure analysis method for a multiphysics-coupled simulation system
Department	Nuclear Science and Engineering Center
Section	Research Group for Reactor Physics and Thermal-Hydraulics Technology
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Susumu Yamashita Tel: +81-29-282-5097 E-mail: yamashita.susumu[at]jaea.go.jp
Summary	The Reactor Physics and Thermal-Hydraulics Research Group is developing a multi-physics coupled simulation system for coupled analysis of various physical phenomena in nuclear reactors. In this theme, a postdoctoral researcher conducts research and development to analyze the deformation behavior of structures considering the effects of thermal-hydraulic fields. In particular, the postdoctoral researcher develops a coupling method of a detailed multi-phase, multi-component thermal hydraulics analysis code JUPITER and an open-source finite element method code FrontISTR. The postdoctoral researcher also extracts issues for the method, resolves the issues, and validates the coupled simulation system.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Material Mathematics Mechanics Computer and Information

No.	31
Theme	Structural sttudies on functional materials using neutron scattering
Department	Materials Sciences Research Center, Nuclear Science Research Institute, Sector of Nuclear Science Reseach
Section	Strongly Correlated Materials Research Group, Neutron Materials Research Division
Location	Tokai(NSRI)
ContactPerson *Replace [at] with @	Katsuaki　Kodama Tel: +81-29-282-6474 E-mail: kodama.katsuaki[at]jaea.go.jp
Summary	A successful candidate will study the relationship between structural characteristics and functional physical properties in functional materials, for example, strongly correlated electron systems and ions conductors by using steady and pulse neutron scattering instruments installed in JRR-3 and J-PARC, respectively. Further, he/she can also develop the neutron scattering technique and data analysis for high-resolution powder diffractometer which is owned by our group. We welcome young researchers who are willing to work on such research theme with high motivation, regardless of previous experience and expertise.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Applied Physics Material Measurements and Instruments

No.	32
Theme	Material research on exotic phenomena using neutrons and synchrotron radiation
Department	Materials Sciences Research Center, Nuclear Science Research Institute, Sector of Nuclear Science Reseach
Section	Strongly Correlated Materials Research Group, Neutron Materials Research Division
Location	Tokai(NSRI)
ContactPerson *Replace [at] with @	Koji Kaneko Tel: +81-29-284-3808 e-mail: kaneko.koji[at]jaea.go.jp
Summary	Our group operates 3 triple-axis spectrometers installed at the steady neutron source JRR-3, and has modernized them to study exotic phenomena in matter. In this role, you will join the triple-axis team and be tasked with developing scientific program mainly on these spectrometers, in combination with supplementary techniques, such as pulsed-neutron and synchrotron radiation. You will also be encouraged to develop the instrument with sample environments, as well as the software, to improve the instrument’s performance. We welcome young researchers with high motivation. Previous experience in fields such as condensed matter physics, neutron/x-ray spectroscopy is preferred, but not mandatory.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Material Measurements and Instruments Applied Physics

No.	33
Theme	Nanostructural study of functional materials using neutron scattering
Department	Materials Sciences Research Center, Nuclear Science Research Institute, Sector of Nuclear Science Reseach
Section	Hierarchical Structure Research Group, Neutron Materials Research Division
Location	Tokai(NSRI)
ContactPerson *Replace [at] with @	Takayuki Kumada Tel: +81-29-284-3834 E-mail:　kumada.takayuki[at]jaea.go.jp
Summary	This work focuses on the hierarchical structure of chemical, physical, and biological systems on the nano to sub-micron length scale using a various kinds of neutron scattering instruments, in particular, small-angle neutron scattering (SANS-J) installed at JRR-3, and then, elucidating the origin of the materials functionalization. In addition, it is required to contribute for developing small-angle neutron scattering instruments, leading to cutting-edge innovation in the research. We expect applications from ambitious young scientists who are motivated to develop their own scientific topics.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Chemistry Biology Geo and Environemtal Sciences Material Measurements and Instruments

No.	34
Theme	Recycling metals and radioactive material through selective separation for a more sustainable use of resources
Department	Materials Sciences Research Center, Nuclear Science Research Institute, Sector of Nuclear Science Reseach
Section	Actinide Sciences Research Group, Energy and Environment Materials Science Division
Location	Tokai(NSRI)
ContactPerson *Replace [at] with @	Marie Simonnet Tel: +81-29-282-6304 E-mail: simonnet.marie[at]jaea.go.jp
Summary	Metals and radioactive materials could be recovered from industrial waste to help creating a more sustainable use of limited resources. This requires advanced chemistry to perform efficient and selective elemental separation and purification. In this research theme, the aim is to find ways of improving the current separation methods through the design of new molecules (DFT calculations), the determination of optimal parameters such as diluent, modifier, concentrations, etc. and the fundamental study of the speciation through different analysis tools (NMR, UV-Vis, EXAFS, etc.).
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Chemistry Applied Chemistry Measurements and Instruments Computer and Information

No.	35
Theme	Material science research by synchrotron radiation
Department	Materials Sciences Research Center, Nuclear Science Research Institute, Sector of Nuclear Science Reseach
Section	Actinide Sciences Research Group, Energy and Environment Materials Science Division
Location	Harima, Hyogo
ContactPerson *Replace [at] with @	Shin-ichi　Fujimori Tel: +81-70-1493-2188 E-mail: fujimori[at]spring8.or.jp
Summary	Energy and Environment Materials Science Division of the Materials Sciences Research Center is developing experimental techniques using JAEA's beamlines BL22XU and BL23SU at SPring-8, and promoting advanced materials science research using these beamlines. In this research theme, we utilize advanced materials science research using soft X-ray angle-resolved photoemission spectroscopy (ARPES), soft X-ray absorption magnetic circular dichroism spectroscopy (XMCD), scanning transmission X-ray microscopy (STXM) and support for synchrotron radiation users. The position is also responsible for upgrading and maintaining the above equipment and providing support to users of the synchrotron radiation facilities. Although experience in this field is desirable, young researchers who are willing to take on new challenges are also welcome to apply.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Applied Physics Measurements and Instruments Material

No.	36
Theme	Development of a valence state analysis for light to heavy elements in environmental samples using a high-energy x-ray microbeam in the same field of view and its application to correlation analysis of different elements
Department	Materials Sciences Research Center, Nuclear Science Research Institute, Sector of Nuclear Science Reseach
Section	Actinide Sciences Research Group, Energy and Environment Materials Science Division
Location	Harima, Hyogo
ContactPerson *Replace [at] with @	Hajime　Tanida Tel: +81-80-4903-5984 E-mail: tanida.hajime[at]jaea.go.jp
Summary	A wide variety of elements contained in environmental samples such as radioactive particulates and nuclear fuel debris originating and futurely removed from the Fukushima Daiichi Nuclear Power Plant, and vitrified materials have been measured using high-energy X-ray microbeam focusing mirrors installed at the beamline BL22XU of Japan Atomic Energy Agency at SPring-8 to perform elemental mapping and valence mapping measurements in the same field of view over a wide energy range from the Ca K edge to the Ce K edge without changing the focusing beam setting. If necessary, we will also perform analysis using the STXM (scanning soft X-ray microscope) installed in the beamline BL23SU. Any enthusiastic young researcher is welcome to join this project, regardless of previous experience or expertise. We encourage an enthusiastic young researcher to submit an application regardless of the previous speciality.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Geo and Environemtal Sciences Measurements and Instruments Chemistry Radiation Physics

No.	37
Theme	X-ray absorption spectroscopy study on the reaction mechanism of energy conversion materials
Department	Materials Sciences Research Center, Nuclear Science Research Institute, Sector of Nuclear Science Reseach
Section	Advanced Energy Materials Research Group, Energy and Environment Materials Science Division
Location	Harima, Hyogo
ContactPerson *Replace [at] with @	Daiju　Matsumura Tel: +81-70-1435-6393 E-mail: daiju[at]spring8.or.jp
Summary	In this research theme, using X-ray absorption spectroscopy measurement system at large synchrotron radiation facility SPring-8, we will conduct research about energy conversion materials such as fuel cell electrode catalysts, automobile exhost catalysts, solar cells, and radiation power generation elements. Based on the structural and electronic information of the materials during the reaction of materials, we will clarify the energy conversion mechamism and determine the key structural factors which are the origin of the properties of materials, and feed them back to the production of optimal materials. In addition, we will also develop the measurement environment around the sample in order to realize the reaction environment of materials under syhchrotron radiation condition. Because the X-ray observation system is used by many researchers, we will aim for the creation of wide research connection group by upgrading to the more attractive equipment.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Measurements and Instruments Chemistry Material Geo and Environemtal Sciences Applied Chemistry

No.	38
Theme	Study on surface and interface of energy materials by means of synchrotron radiation
Department	Materials Sciences Research Center, Nuclear Science Research Institute, Sector of Nuclear Science Reseach
Section	Advanced Energy Materials Research Group, Energy and Environment Materials Science Division
Location	Harima, Hyogo
ContactPerson *Replace [at] with @	Akitaka　Yoshigoe Tel: +81-70-1428-8178 E-mail: yoshigoe[at]spring8.or.jp
Summary	The main targets of this study are surface and interface of advanced materials relating to wide varieties of reserach fields such as nano-devices, power devices, fuel cells, solar cells, and nuclear power. In practice, we will conduct in situ observation and analysis of reactions occurring at the surface and interface in gaseous and heated environments at the atomic level by using JAEA beamlines at SPring-8. The goal of our study is to solve various issues of surface and interface to establish basic science or future innovations. For instance, material processes which contribute to architecuture of the advanced devices for energy saving, energy conversion/control are investiigated. Futhermore, we also deal with high-efficient processes such as catalytic reactions. The project will also develop technologies relating to material DX researches, such as automation of measurement, remote control, data structuring, and so on.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Measurements and Instruments Applied Physics Applied Chemistry Material Chemistry Electricity and Electronics Computer and Information

No.	39
Theme	Study on advanced boron-based neutron pulse shaping materials for high-intense neutron source
Department	Sector of Nuclear Science Research J-PARC Center
Section	Materials and Life Science Division Neutron Source Section
Location	J-PARC
ContactPerson *Replace [at] with @	Masahide Harada Tel: +81-29-282-6217 E-mail: harada.masahide[at]jaea.go.jp
Summary	As pulsed neutron sources provide narrow and sharp pulses useful for neutron scattering experiments by combination of moderators, reflectors, and neutron absorbers, the role of neutron absorbers is very important. In this research, we will research and develop boron-based neutron absorbers having stable performance for a long period in high radiation fields, such as in the spallation pulse neutron source at J-PARC. Specifically, the optimization of neutronic performance, material composition selected by an nuclear simulation of burn-up evaluation, evaluation of material properties by irradiation test and neutronic performance evaluation by neutron transmission experiments will be performed to realized a practical application.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Chemistry Radiation Material Applied Physics

No.	40
Theme	Nanostructural Analysis of Polymer Materials using Small-Angle Scattering
Department	Sector of Nuclear Science Research J-PARC Center
Section	Materials and Life Science Division Neutron Science Section
Location	J-PARC
ContactPerson *Replace [at] with @	Shinichi Takata Tel: +81-29-284-3267 E-mail: shinichi.takata[at]j-parc.jp
Summary	The goal of this research is to clarify the correlation between physical properties and nanostructures of polymer materials such as fuel cell membranes, polymer gels, cellulose nanofibers, and proteins due to external environmental changes such as stretch and pressure by using the small- and wide-angle neutron scattering instrument (TAIKAN) installed at the Materials and Life Science Experimental Facility, J-PARC Center.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Material Physics Chemistry Biology

No.	41
Theme	Research on performance improvement of power supply for J-PARC accelerator
Department	Sector of Nuclear Science Research J-PARC Center
Section	Accelerator Division, Accelerator Section IV
Location	J-PARC
ContactPerson *Replace [at] with @	Hidetomo　Oguri Tel: +81-29-284-3132 E-mail:oguri.hidetomo[at]jaea.go.jp
Summary	At J-PARC, the accelerators are being upgraded to achieve stable operation at a maximum beam power of 1 MW, based on the facility's medium- to long-term plan. In order to realize this goal, research on upgrading power supplies for the accelerators is essential. In this theme, research and development of new power supplies using SiC power devices, which is one of the next-generation power semiconductors, will be conducted to achieve smaller size, lower power consumption, and higher efficiency compared to power supplies based on conventional Si power devices.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Radiation Electricity and Electronics Applied Physics Measurements and Instruments Computer and Information

No.	42
Theme	R&D on liquid lead-bismuth target technology and proton beam technology for accelerator-driven nuclear transmutation system (ADS)
Department	Sector of Nuclear Science Research J-PARC Center
Section	Nuclear Transmutation Division
Location	J-PARC
ContactPerson *Replace [at] with @	Fujio Maekawa Tel: +81-29-284-3315 E-mail:maekawa.fujio[at]jaea.go.jp
Summary	The Nuclear Transmutation Division of J-PARC Center is conducting R&D for the development of accelerator-driven nuclear transmutation systems (ADS). In the R&D on the liquid lead-bismuth target for ADS, we are studying thermal hydraulics properties and materials corrosion behavior with using liquid lead-bismuth test loops, and also developing sensors dedicated to lead-bismuth such as flow meters and oxygen concentration sensors. In the R&D on the proton beam technology, we are studying nuclear reaction cross section with using the J-PARC’s GeV-energy proton beam, and also developing high-intensity proton beam monitors and superconducting accelerators for ADS. In this theme, R&D items in line with the applicant's expertise will be studied. (https://j-parc.jp/c/OPEN_HOUSE/2021/others/transmutation.html)
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Radiation Measurements and Instruments Applied Physics Mechanics Material

No.	43
Theme	Development and application of a He-3 spin filter for neutron scattering experiments
Department	Sector of Nuclear Science Research J-PARC Center
Section	Materials and Life Science Division Technology Development Section
Location	J-PARC
ContactPerson *Replace [at] with @	Takayuki Oku Tel: +81-29-284-3196 E-mail: takayuki.oku[at]j-parc.jp"
Summary	We will improve He-3 spin filters based on a spin-exchanged optical pumping method and apply them to pulsed neutron beam experiments at J-PARC MLF. Moreover, we will also develop sample environment for the He-3 spin filters to diversify the applicable experiments
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Material Physics Chemistry Applied Physics

No.	44
Theme	Research on performance improvement of linac in J-PARC accelerators
Department	Sector of Nuclear Science Research J-PARC Center
Section	Accelerator Division Accelerator Section I
Location	J-PARC
ContactPerson *Replace [at] with @	Takatoshi Morishita Tel: +81-29-284-3142 E-mail: takatoshi.morishita[at]j-parc.jp
Summary	The J-PARC accelerator is being upgraded to stably accelerate 1 MW high-intensity proton beams, and the linac, located at the upstream of the J-PARC accelerator, generates negative hydrogen ion beams and accelerates them up to 400 MeV energy. In this theme, we will study the improvement of beam quality mainly in the linac by using actual machines, test benches, and computer simulations to increase beam power and reduce beam loss. In addition, R&D for upgrading the beam source, accelerating cavity, RF source, magnets, and beam diagnostic equipment will be carried out to achieve stable and high availability operation.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Radiation Electricity and Electronics Applied Physics Measurements and Instruments Computer and Information

No.	45
Theme	Research and development of new measurement techniques using J-PARC pulsed neutrons and prompt γ-rays
Department	Sector of Nuclear Science Research J-PARC Center
Section	Materials and Life Science Division Neutron Science Section
Location	J-PARC
ContactPerson *Replace [at] with @	Kenichi Oikawa Tel: +81-29-284-3211 E-mail: kenichi.oikawa[at]j-parc.jp
Summary	Using the test beam port "NOBORU" (BL10) and other neutron instruments in MLF at J-PARC, and Monte Carlo simulation software such as PHITS and McStas, this project aims at developing detectors and measurement techniques for high-energy neutron measurement, local structure analysis using prompt γ-rays, and the angular distribution of prompt γ-rays using polarized neutrons. You will be engaged in the field of your choice among these topics collaborating with us. In addition, you will be expected to provide user support on related experiments that may contribute to enhance your own research ability and experience.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Measurements and Instruments Radiation Computer and Information Material Physics

No.	46
Theme	Structure and dynamics of soft matters studied by isotope labeling methods
Department	Sector of Nuclear Science Research J-PARC Center
Section	Materials and Life Science Division Technology Development Section
Location	J-PARC
ContactPerson *Replace [at] with @	Takayuki Oku Tel: +81-29-284-3196 E-mail:takayuki.oku[at]j-parc.jp
Summary	Unique functions of soft matter, such as proteins and polymer materials, originate from the large degree of freedom of a consisting molecule. Neutron scattering techniques with isotope-labeled samples are powerful tools to elucidate the structure and dynamics of soft matters because it enables the selective measurement of a specific site in a molecule. This research topic aims at the elucidation of structure and dynamics of soft matters by neutron scattering methods using deuterated samples.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Material Applied Physics Applied Chemistry

No.	47
Theme	Research and development for increasing beam power and stability of the J-PARC accelerator system
Department	Sector of Nuclear Science Research J-PARC Center
Section	Accelerator Division Accelerator Section II
Location	J-PARC
ContactPerson *Replace [at] with @	Kazami Yamamoto Tel: +81-29-284-3095 E-mail:kazami[at]post.j-parc.jp
Summary	Research and development activities are carried out for realizing stable 1-MW beam power operation in the J-PARC proton accelerators. Beam loss reduction is one of the main issues with such a high power beam in the accelerators. A stable and long lifetime operation of accelerator components are also important issues. The candidate will research one or more topics for beam loss reduction in the J-PARC 3GeV rapid cycling synchrotron. Themes are the beam loss simulations, diagnostics and research of the beam loss source, improvement of accelerator components to establish stability, such as the electro-magnet system, vacuum system or reduction of the beam instability source.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Radiation Electricity and Electronics Applied Physics Measurements and Instruments Computer and Information

No.	48
Theme	Study on high-performance beam diagnostic system of J-PARC accelerator
Department	Sector of Nuclear Science Research J-PARC Center
Section	Accelerator Division Accelerator Section III
Location	J-PARC
ContactPerson *Replace [at] with @	Junichiro Kamiya Tel: +81-29-284-3164 E-mail: kamiya.junichiro[at]jaea.go.jp
Summary	An accelerator is a complex of many high-precision devices. Each device should operate in rigid synchronization to achieve the high performance of the accelerator. Since J-PARC is a multi-purpose accelerator and has multiple beam destinations, it is necessary to optimize the operating conditions for each destination. Therefore, the beam diagnostics system for the simultaneous operation of different destinations is very important. In addition, the input timing to the beam diagnostic system and the output data from the such system must be strictly controlled for each operation mode. The long-term and short-term changes in the vacuum condition and their effects on the beam are also notable subjects of research. In this theme, we will conduct research on upgrading not only the beam diagnostics system but also various diagnostics, control system, and vacuum system including other components. The aim of this is the contribution to the realization of a facility that provides highly stable operation of accelerators and high-quality beams to all users. More specifically, we will develop a beam diagnostic system that can be used even at high intensity, eliminate the defects in the timing and data acquisition systems, and develop a system for recording equipment malfunctions and their signs.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Mathematics Radiation Electricity and Electronics Material Measurements and Instruments Computer and Information

No.	49
Theme	Pulsed Neutron Diffraction Studies on Engineering Materials
Department	Sector of Nuclear Science Research J-PARC Center
Section	Materials and Life Science Division Neutron Science Section
Location	J-PARC
ContactPerson *Replace [at] with @	Takuro Kawasaki Tel: +81-29-284-4550 E-mail: takuro.kawasaki[at]j-parc.jp
Summary	In this theme, research on the correlation between crystallographic structural properties and mechanical and/or functional properties of materials will be conducted using neutron diffraction and scattering, mainly using the engineering materials diffractometer TAKUMI at the Materials and Life Science Experimental Facility of J-PARC. The research targets metallic structural materials such as steel and light metal alloys, and functional materials such as ferroelectric ceramics and solid electrolytes. In addition, sample environmental devices and measurement/analysis methods required for the research will also be developed.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Material Physics Mechanics Measurements and Instruments Computer and Information Chemistry

No.	50
Theme	Neutronic study to establish a new concept of pulsed neutron source and its fundamental research
Department	Sector of Nuclear Science Research J-PARC Center
Section	Materials and Life Science Division Neutron Source Section
Location	J-PARC
ContactPerson *Replace [at] with @	Masahide Harada Tel: +81-29-282-6217 E-mail: harada.masahide[at]jaea.go.jp
Summary	In the Materials and Life Science Division of the J-PARC Center, a new and more optimized spallation pulsed neutron source concepts are being studied to contribute to the expansion of research fields, based on various technology and knowledge obtained from the operation of the 1 MW spallation pulsed neutron source. In this study, basic data such as cross sections and scattering data in the cold and thermal neutron energy region, which are necessary for the refinement of this neutron source concept, will be precisely measured by neutron scattering and neutron transmission experiments. Then, particle transport calculations applying the measurement data will be performed to establish an optimized high-intensity pulsed neutron source concept.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Chemistry Radiation Material Applied Physics

No.	51
Theme	Application of advanced computational science and technology on neutron scattering measurements and analyses at a pulsed neutron source facility.
Department	Sector of Nuclear Science Research J-PARC Center
Section	Materials and Life Science Division Technology Development Section
Location	J-PARC
ContactPerson *Replace [at] with @	Kazuyoshi　Tatsumi Tel: +81-29-284-3169 E-mail: tatsumi.kazuyoshi[at]jaea.go.jp
Summary	We have tried to apply computational sciences toward neutron scattering measurements and analyses in J-PARC MLF so as to utilize the measurements more effectively in materials and life science. The postdoctoral fellow shall develop such analyses methods as combining the experimental neutron scattering data and computations based on machine learning atomic potentials so as to analyze the atomistic static or dynamic information. The postdoctoral fellow shall carefully discuss on the targeted method with beam line staffs. We hope a powerful person who can construct the atomistic models which explain the experimental data by means of the computational materials science methods or who can apply the state-of-the-art machine learning methods to the experimental neutron scattering data.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Computer and Information Measurements and Instruments Mathematics Material

No.	52
Theme	Development of Scintillator-based or Gas-based Neutron Detectors at Materials and Life Science Facility of J-PARC
Department	Sector of Nuclear Science Research J-PARC Center
Section	Materials and Life Science Division Neutron Instrumentation Section
Location	J-PARC
ContactPerson *Replace [at] with @	Tatsuya Nakamura Tel: +81-29-282-5344 E-mail: nakamura.tatsuya[at]jaea.go.jp
Summary	The successful candidates will be participating in the development of scintillator or gas based neutron detectors for the world-leading pulsed neutron scattering instruments in the J-PARC MLF. The candidates will be involved in the project to improve detector performances such as detector efficiency, spatial resolution, count rate capability. You will have varied and wide ranging duties througout the detector system that will include development of new detection mateials, electronic cirucuit, signal processing and detection method.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Radiation Measurements and Instruments Electricity and Electronics Material

No.	53
Theme	R&D on the multilayer optics for polarized neutrons
Department	Sector of Nuclear Science Research J-PARC Center
Section	Materials and Life Science Division Neutron Instrumentation Section
Location	J-PARC
ContactPerson *Replace [at] with @	Ryuji Maruyama Tel: +81-29-284-3811 E-mail: ryuji.maruyama[at]j-parc.jp
Summary	The core component of this role is to join our R&D in the field of the multilayer optics for polarized neutrons which enhances the capability of the polarized neutron scattering technique and meets a veriety of research demands in J-PARC MLF. This will involve elements such as a research of the magnetism of layered systems which are not seen in the bulk and development of the software and technique to analyze the in-plane/out-of-plane magnetic structure of the multilayers using the polarized neutron scattering with considerable flexibility depending on your particular skills and interests. As part of this role you will develop your own scientific research program in the field related to the ones mentioned above in collaboration with the staff in MLF.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Applied Physics

No.	54
Theme	R&D on establishment of mid-and-long-term behavior estimation method for a cementitious solidified product
Department	Nuclear Backend Technology Center Nuclear Fuel Cycle Engineering Laboratories Sector of Nuclear Fuel, Decommissioning and Waste Management Technology Development
Section	Waste Processing Technology Section Decommissioning Technology Department
Location	Tokai-mura, Ibaraki (Nuclear Fuel Cycle Engineering Laboratories)
ContactPerson *Replace [at] with @	Takeshi Osugi Tel: +81-29-282-1133 (ext. 65700) E-mail: ohsugi.takeshi[at]jaea.go.jp
Summary	This R&D attempts to verify and establish estimation methods on analisis of a mid-and-long-term behavior and to construct anlytical model for revealing the deterioration mechanisms, and will contribute to selection of methods for managent of radioactive wastes arising from decommissioning operations. A wide variety of radioactive wastes have arisen from decommissioning of the Fukushima Daiichi Nuclear Power Station. These wastes need to be managed (storage, processing, disposal) for a certain period. It is almost impossible to obtain each data on the soundness and deterioration of a waste solidified product for all wastes, since characteristics of a waste solidified product changes according to properties of the wastes.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Material Geo and Environemtal Sciences Architectural and Civil Engineering Chemical Engineering Applied Physics Computer and Information

No.	55
Theme	R&D on processing of radioactive organic liquids
Department	Nuclear Backend Technology Center Nuclear Fuel Cycle Engineering Laboratories Sector of Nuclear Fuel, Decommissioning and Waste Management Technology Development
Section	Waste Processing Technology Section Decommissioning Technology Department
Location	Tokai-mura, Ibaraki (Nuclear Fuel Cycle Engineering Laboratories)
ContactPerson *Replace [at] with @	Takeshi Osugi Tel: +81-29-282-1133 (ext. 65700) E-mail: ohsugi.takeshi[at]jaea.go.jp
Summary	This R&D attempts to treat radioactive organic liquids containing uranium after evaluating characterization of them, and will contribute to the promotion of decommissioning of domestic nuclear facilities. Waste organic solvent and machine oil used in nuclear facilities have been stored, and it can be predicted that many research facilities will generate them according to decommissioning. It is considered that these organic solvents and the like have a negative impact on the landfill environment and difficulties to be solidified by using cementitious materials. Therefore, it is positioned as one of the wastes that is difficult to treat, and it is required to establish an appropriate processing method as the steam reforming treatment or the alkali activated materials (AAM) solidification.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Geo and Environemtal Sciences Radiation Material Applied Chemistry Chemical Engineering Computer and Information

No.	56
Theme	Experimental and analytical study to improve the safety and reliability of a sodium cooled fast reactor
Department	Fast Reactor Cycle System Research and Development Center Sector of Fast Reactor and Advanced Reactor Research and Development Japan Atomic Energy Agency
Section	Fast Reactor Fundamental Technology Development Department Fast Reactor Life-Cycle Safety and Integrity Evaluation Technology Development Department
Location	Oarai Research & Development Institute
ContactPerson *Replace [at] with @	Kenji Kamiyama Tel: +81-29-267-1919 (Int., 6774) E-mail: kamiyama.kenji[at]jaea.go.jp
Summary	The Fast Reactor Cycle System Research and Development Center conducts the following experimental and analytical studies to improve the safety and reliability of a sodium cooled fast reactor: - Study on core and shielding properties, - Study on cooling characteristics inside the reactor vessel, - Study on thermo-hydraulic behavior and chemical reaction during severe accidents, including migratoin behavior of fission products, - Study for advancement of the evaluation method of structural design, including development of codes and standard, and so on. The applicant can select the research theme from the above list based on the expertise of applicant and conduct the research using experimental and analysis equipments, computer codes, conputer, and so on, which the eache section owes. (https://www.jaea.go.jp/04/sefard/randd/development/)
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Mechanics Material Electricity and Electronics Chemical Engineering Applied Chemistry Measurements and Instruments Computer and Information

No.	57
Theme	Development of computer codes to simulate irradiation behavior of fast reactor fuel elements and fuel assemblies
Department	Fast Reactor Cycle System Research and Development Center Sector of Fast Reactor and Advanced Reactor Research and Development Japan Atomic Energy Agency
Section	Fuel Technology Development Section Fuels and Materials Department
Location	Oarai Research & Development Institute
ContactPerson *Replace [at] with @	Tomoyuki Uwaba Tel: +81-29-267-1919 (Int., 6447) E-mail: uwaba.tomoyuki[at]jaea.go.jp
Summary	For the purpose of strengthening the research and development indispensable for the practical application of fast reactor cycle technology, a postdoctoral researcher shall develop computer codes to simulate irradiation behaviors of fuel elements and fuel assemblies in fast reactors and to realize highly reliable fuel design and innovative new fuels. In this research and development, the researcher shall analyze the post-irradiation tests of fuel elements or subassemblies irradiated in fast reactors such as "Joyo" by using the "CEDAR" code that simulates the behavior of fuel elements, the "BAMBOO" code that simulates a fuel element bundle deformation under bundle-duct interactions, and the coupled system of the codes. Based on the analyses, the researcher shall develop models to predict fuel irradiation behaviors and introduce the models into the codes, improving their reliability and analytical functions.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Mechanics Material Computer and Information Applied Physics Mathematics

No.	58
Theme	Research and developlment of risk assesment methodology for sodium-cooled fast reactors
Department	Fast Reactor System Design Department Sector of Fast Reactor and Advanced Reactor Research and Development
Section	Fast Reactors Design Group
Location	Oarai Research & Development Institute
ContactPerson *Replace [at] with @	Kenichi Kurisaka Tel: +81-29-267-1919 (Int., 6778) E-mail: kurisaka.kennichi[at]jaea.go.jp
Summary	To develop a global standard for risk-informed safety design approach, our group has been studying on the development of Levels 1 to 3 probabilistic risk assessment (PRA) methodologies for sodium-cooled fast reactors (SFR), including external events. This program will contribute to improving Japan’s PRA for SFRs through a practical work on PRA of SFRs (e.g., experimental fast reactor "JOYO"). The hired researcher will examine applicability of the PRA methodologies developed for light water reactors to SFRs and then develop the Level 1-3 PRA methodologies for SFRs. The scope of this program may be reviewed accorinding to applicant requests.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Mathematics Radiation Mechanics

No.	59
Theme	Development of a water leak detection system for a steam generator of a sodium cooled fast reactor
Department	Fast Reactor System Design Department Sector of Fast Reactor and Advanced Reactor Research and Development
Section	Fast Reactors Design Group
Location	Oarai Research & Development Institute
ContactPerson *Replace [at] with @	Atsushi Kato Tel: +81-29-267-1919 (Int., 6413) E-mail: kato.atsushi[at]jaea.go.jp
Summary	We are developing a leak detection system for early detection of water leak events that occur in the heat transfer tubes of steam generators in sodium-cooled fast reactors to prevent the spread of accidents. This system aims to achieve high reliability and detection performance based on the phenomenon that hydrogen generated in the sodium-water reaction permeates through a Ni film installed in the cover gas area and sodium. This development is a key issue for larger steam generators because it contributes to early detection of accidents and prevention of their spread. In the development, the behavior of hydrogen in gas and sodium is considered phenomenologically, and an algorithm to improve the signal-to-noise ratio that can identify hydrogen generated during a water leak event is developed through the use of computer chemistry and verification by testing at the Oarai Research & Development Institute and other facilities. The study will examine the behavior of hydrogen in sodium and gases (dissolved hydrogen atoms, dissolved hydrogen molecules, hydrogen bubbles, and hydrogen compounds) according to plant operating conditions and the conditions of water leak events in heat transfer tubes, and analyze the behavior near the Ni film. The system will be constructed to enable highly reliable detection of minute leaks. The research scope will be considered according to the applicant's preference and experience.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Chemistry Material Chemical Engineering Measurements and Instruments Computer and Information

No.	60
Theme	Development of techniques of radiometric dating for geological events
Department	Tono Geoscience Center Sector of Nuclear Fuel, Decommissioning and Waste Management Technology Development
Section	Geochronology Research Group Geoscientific Research Department
Location	Toki City, Gifu prefecture
ContactPerson *Replace [at] with @	Akiomi Shimada Tel: +81-572-53-0211 E-mail: shimada.akiomi[at]jaea.go.jp
Summary	For the study on long-term geological stability related to research and development of the geological disposal of high-level radioactive waste, we need to estimate the ages of past fault and volcanic activities, as well as uplift and erosion rates by techniques of radiometric dating. The aim of our study is improvement for the techniques of radiometric dating using an accelerator mass spectrometry and an inductively coupled plasma mass spectrometry in order to know the age of geological events.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Measurements and Instruments Geo and Environemtal Sciences Chemistry