Japan Atomic Energy Agency : Recruitment

HOME > News & Information > Recruitment > Recruitment for Postdoctoral Fellow 2025 (Fixed-term researcher) > Recruitment Field for Postdoctoral Fellow of JAEA

Recruitment

Recruitment for Postdoctoral Fellow 2025 (Fixed-term researcher)
Recruitment Field for Postdoctoral Fellow of JAEA

<Back

No.	1
Theme	R&D conserning Fukushima environmental remediation utilizing computing technologies such as sparse-modeling and air-dose simulations
Department	Center for Computer Science and e-Systems
Section	AI/DX 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 estimation of radiation sources from air-dose distribution based on sparse-modeling and Bayesian statistics, and air-dose calculation utilizing detailed models of terrain and buildings. The selected candidate will conduct research on themes such as estimation of radiation sources inside the Fukushima Daiichi nuclear power plant, and detailed estimation of air-dose distribution around and inside buildings in Fukushima.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Computer and Information Geo and Environemtal Sciences Biology Radiation Physics

No.	2
Theme	R&D of techniques for atomistic simulation utilizing first-principles calculation and machine learning
Department	Center for Computer Science and e-Systems
Section	AI/DX 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 using first-principles calculations, first-principles molecular dynamics, and machine-learning molecular dynamics. The selected candidate will conduct research on themes such as development of calculation method for machine-learning molecular dynamics and high-accuracy molecular dynamics incorporatig nuclear quantum effect, and/or application of the developed method for evaluation of thermal properties of MOX fuel, embrittlement of ferrite and austenite steels, irradiation behavior of graphite and SiC, and behaviour of radioactive elements in environment and living body.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Computer and Information Physics Material Geo and Environemtal Sciences Mechanics

No.	3
Theme	R&D of techniques for matelials simulation utilizing meso-scale modeling
Department	Center for Computer Science and e-Systems
Section	AI/DX 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 mesoscopic materials modeling for diffusion behavior of defects and impurities in nuclear fuels and structural materials, and environmental behavior of radioactive elements. The selected candidate will conduct research on themes such as evaluation of material properties of MOX fuel, hydrogen and irradiation embrittlement of ferrite and austenite steels, and behaviour of radioactive elements in environment and living body.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Computer and Information Physics Material Geo and Environemtal Sciences Mechanics

No.	4
Theme	R&D of multi-phase CFD simulations
Department	Center for Computational Science and e-Systems
Section	HPC/DX Research 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 conducting R&D of a gas-liquid two-phase CFD code on GPU supercomputers as a fundamental technology for new reactor design and safety evaluation of nuclear reactors. The selected candidate will work on R&D of GPU computation techniques, parallelization techniques, CFD methods, interface capturing models, etc. for the multi-phase CFD code, and conduct thermal hydraulics analysis in nuclear reactors to demonstrate the utility of the developed techniques.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Mathematics Applied Physics Computer and Information

No.	5
Theme	R&D of turbulence data assimilation
Department	Center for Computational Science and e-Systems
Section	HPC/DX Research 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 conducting R&D of data assimilation techniques that link observation and analysis in order to improve the accuracy of wind simulations such as plume dispersion analysis. The above simulations require different levels of data assimilation, ranging from observation-based direct modification of velocity fields to optimization of highly uncertain model parameters, and advanced modeling that takes into account the spatio-temporal scales, and observation and analysis costs is essential. The selected candidate will work on R&D of data assimilation techniques in real-time wind analysis codes on GPU supercomputers, and conduct plume dispersion analysis to demonstrate the utility of the developed techniques.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Mechanics Applied Physics Geo and Environemtal Sciences Architectural and Civil Engineering Computer and Information

No.	6
Theme	R&D of xR visualization
Department	Center for Computational Science and e-Systems
Section	HPC/DX Research 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 conducting R&D of xR visualization technology to visualize and analyze large-scale data generated from simulations and observations. xR visualization technology requires a technology, in which visualization images of diverse data such as volume data, CAD data, 3D point cloud data, and camera images can be integrated in a virtual space on a head-mounted display, and multiple users can share the virtual space and analyze the data interactively. The selected candidate will work on R&D of xR visualization technology in PBVR, a visualization system being developed at CCSE, and extend it for practical application problems.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Computer and Information Mathematics

No.	7
Theme	R&D of HPC technologies
Department	Center for Computational Science and e-Systems
Section	HPC/DX Research 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 the development of high-performance computing technology to accelerate nuclear analysis codes on supercomputers with various architectures. In the above technology, numerical algorithms that reduce data transfers between computing nodes and from memory to processors, and highly portable implementations that extract performance from processors with different architectures are important. Also, advanced implementations based on knowledge of state-of-the-art applied mathematics and compiler technology are essential. The selected candidate will work on R&D of high-performance computation techniques in PARCEL, a matrix library being developed at CCSE, and validate its utility in nuclear analysis codes.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Computer and Information Mathematics

No.	8
Theme	Research and development of radiation measuring instruments and related systems
Department	Fukushima Research and Engineering InstituteCollaborative Laboratories for Advanced Decommissioning Science
Section	Radiation Sensing and Digitization Group
Location	Fukushima
ContactPerson *Replace [at] with @	Yuki Sato Tel : +81-80-7056-7499 E-mail : sato.yuki[at]jaea.go.jp
Summary	In the decommissioning work, understanding the distribution of dose rates and radioactive contamination in the work area is crucial not only for reducing workers' exposure but also for efficient decontamination, dismantling, and subsequent management of radioactive waste. We are seeking motivated postdoctoral researcher who can conduct research and development on radiation measurement instruments and systems capable of measuring and distinguishing alpha, beta, gamma, and neutron radiation in high-dose rate environments. Applicants should have experience in the development of radiation measurement instruments, visualization techniques, or sensor materials. Additionally, individuals with an interest in utilizing information processing technologies such as environmental recognition and artificial intelligence are encouraged to apply, and experience in developing measurement systems based on radiation sensors is desirable.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Radiation Electricity and Electronics Measurements and Instruments Computer and Information

No.	9
Theme	Experimental and analytical studies on the fuel behavior under accident conditions of nuclear power reactors
Department	Nuclear Safety Research Center
Section	Fuel Safety Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Jinya Katsuyama Tel : +81-29-282-6230 E-mail : katsuyama.jinya[at]jaea.go.jp
Summary	It is expected that the safety of light water reactors will be improved by introducing accident-tolerant fuel (ATF), which may mitigate oxidation reaction and core-melting in the severe-event conditions. To enable safety behavior evaluations for the fuels such as ATF during accidents, the following model development and experimental research will be performed focusing the light-water reactors: * Behaviors of ATF under DBA and BDBA events: particularly Cr-coated Zr-alloy cladding and FeCrAl cladding * Improvement of simulation codes: 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. * 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.	10
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 radionuclides during severe accidents, including the effects of countermeasures by accident management. Specifically, the R&D is related to the followings, - Probability Risk Assessment (PRA): the research on Level 1 PRA using thermal-hydraulic system code, Level 2 PRA including source term evaluation using integrated severe accident analysis code, and advanced PRA method (e.g. DPRA) across Level 2/3 and their uncertainty evaluation. - Development of integrated severe accident analysis code (SA code): support the development of SA code to evaluate the accident progression and source term. It includes the overall design of the code, design and programming of analysis modules, investigation of existing SA code, and documentation.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Chemistry Mechanics Geo and Environemtal Sciences Computer and Information Other

No.	11
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.	12
Theme	Study on Materials Degradation Evaluation and Structural Integrity Assessment 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, which include failure estimation, crack propagation or weld residual stress evaluation, on pressure boundary components such as the reactor pressure vessel, piping, 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, numerical simulation, etc.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Mechanics Material Measurements and Instruments Computer and Information Physics Applied Physics

No.	13
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 seismic safety and structural integrity assessments for the building, reactor components and piping 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.
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.	14
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 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, and 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.	15
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.	16
Theme	Research on the optimization of evaluation methods for nuclear criticality safety reference values (estimated lower limit multiplication factor and upper subcriticality level)
Department	Nuclear Safety Research Center
Section	Fuel Cycle Safety Research Division, Criticality Safety Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Satoshi Gunji Tel : +81-29-282-6634 E-mail : gunji.satoshi74[at]jaea.go.jp
Summary	Regarding the evaluation method for nuclear criticality safety standards in Japan (estimated lower limit multiplication factor and upper subcriticality level), the Criticality Safety Handbook adopts a statistical evaluation method based on the calculation results of criticality experiment benchmarks. In the approximately 20 years since then, there has been little research or effort regarding the development of evaluation methods. On the other hand, there are many ocerseas research on this evaluation methods such as methods that take into account various uncertainties in nuclear data that serve as computation inputs, and evaluation of the representativity factor based on the analysis of correlation coefficient. Therefore, the applicant will extensively investigate and analyze the evaluation methods currently being proposed in Japan and overseas, and clarify the advantages and disadvantages of the representative methods according to the applicable targets and conditions in this study. The goal of this study is to consider robust evaluation methods that be widely applyed.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Computer and Information Applied Physics Mechanics Measurements and Instruments Other

No.	17
Theme	Study on safeguards analytical techniques for individual particles containing nuclear materials in environmental samples
Department	Nuclear Safety Research Center
Section	Safeguards Analytical Chemistry Research Group
Location	Tokai
ContactPerson *Replace [at] with @	Kenichiro YASUDA Tel : +81-29-284-3668 E-mail : yasuda.kenichiro[at]jaea.go.jp
Summary	Analysis of nuclear materials of ultra-trace amouts in environmental samples taken at nuclear facilities in the world is performed to reveal nuclear activities, which is important technique for nuclear safeguards. In this study, ultra-trace analysis for measuring isotopic composition and/or chemical states of nuclear materials in a nuclear particle are developed using several mass spectrometer (ICP-MS, TIMS and SIMS) and micro-Raman spectrometer.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Applied Physics Applied Chemistry Measurements and Instruments

No.	18
Theme	Research on exotic heavy-element nuclear science
Department	Sector of Nuclear Science ResearchAdvanced Science Research Center
Section	Research Group for Exotic Heavy-element Nuclear Science
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Dr. Katsuhisa Nishio Tel : +81-29-282-5454 E-mail : nishio.katsuhisa[at]jaea.go.jp
Summary	Experimental and theoretical studies of nuclear physics and/or nuclear chemistry in the region of heavy and superheavy elements will be promoted. In nuclear physics, experimental subjects include nucler structure, nuclear reaction, and nuclear fission for nuclei far from the stable isotopes to find out new phenomena and new principle in exotic nuclei. These subjects are also studied theoretically by taking advantage of the JAEA supercomputer. In nuclear chemistry, to investigate unique electronic structure and chemical bonding in superheavy elements, experiments on aquaus chemistry and gas-phase chemistry, and reaction studies and ionization-energy measurements using ion source, low-energy ion beam, and ion trap will be performed. In the experimental programs, JAEA facilities and/or other external facilities will be used to produce exotic nuclei. ( https://asrc.jaea.go.jp/soshiki/gr/HENS-gr/index_e.html )
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Chemistry Radiation Applied Physics Measurements and Instruments Computer and Information Other

No.	19
Theme	Experimental research for hadron and nuclear physics at J-PARC
Department	Nuclear Science Research InstituteAdvanced 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.	20
Theme	Research on physical properties of strongly correlated electron systems
Department	Nuclear Science Research Institute, Advanced Science Reserch 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	Applicants will conduct research on novel quantum states created by strongly correlated electrons, such as spin triplet superconductivity, higher-order extended multipoles, and topological quantum physical properties. Depending on the individual theme, research will be carried out using complementary methods such as crystal growth, magnetic/transport property measurements, nuclear magnetic resonance, neutron scattering, muon spin relaxation, and resonance X-ray diffraction. Our reserch group is actively conducting international joint research.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Chemistry Material Applied Physics

No.	21
Theme	Study of spin-related physics in condensed matter systems
Department	Advanced Science Research Center
Section	Research Group for Spin-energy Science
Location	Tokai (Nuclear Science Reserch 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.	22
Theme	Study on Surface/Interface and Low-Dimensional Materials
Department	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 Applied Chemistry Measurements and Instruments

No.	23
Theme	Research of Materials Science by using Advanced Muon Beam
Department	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	We recruit researchers who promote research on materials science by using muons, produced by accelerators. Muons, one of the elementary particles, are widely used in materials research, such as to investigate the local magnetic field inside matter with ultra-high sensitivity, or the state and dynamics of hydrogen. In this research subject, by using advanced muon beam obtained from J-PARC and other facilities, applicants investigate properties of materials, such as elucidating the local spin and electronic state, or hydrogen state of materials. An experience of muon or other beam experiment does not be required.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Material Chemistry Applied Physics Applied Chemistry Measurements and Instruments

No.	24
Theme	Theoretical study of many-body quantun systems
Department	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 in JAEA, and to carry out interdisciplinary researches in terms of the role of basic science in JAEA.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics

No.	25
Theme	Development of highly durable functional materials
Department	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.	26
Theme	R&D of Corrosion Calculation Modeling for Nuclear System Materials
Department	Nuclear Science and Engineering Center
Section	Research Group for Corrosion Resistant Materials
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Takahiro Igarashi Tel : +81-29-282-5752 E-mail : igarashi.takahiro[at]jaea.go.jp
Summary	Research Group for Corrosion Resistant Materials has been developing corrosion prediction models and elucidating the corrosion mechanisms of nuclear system materials using computer simulation in order to contribute to ensuring the structural integrity of light water reactors and reprocessing plants. In this theme, we will construct a new calculation model that can predict the corrosion of nuclear system materials under various environments, and evaluate electrochemical reaction behavior by corrosion simulation in aqueous solution to elucidate the corrosion mechanism.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Material Chemistry Computer and Information

No.	27
Theme	R&D of Corrosion Behavior for Metallic Materials under Nuclear System Conditions
Department	Nuclear Science and Engineering Center
Section	Research Group for Corrosion Resistant Materials
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Eriko Irisawa Tel : +81-29-282-5399 E-mail : irisawa.eriko[at]jaea.go.jp
Summary	Research Group for Corrosion Resistant Materials conducts research and development to elucidate the corrosion phenomena of metallic materials used in spent nuclear fuel reprocessing plants from an electrochemical point of view and to contribute to ensuring structural integrity of the materials. In this topic, the corrosion mechanism of stainless steel base metal and welds under irradiation and in solutions containing metal ions derived from spent nuclear fuel will be clarified, taking into account the interaction between metal ions, and an advanced evaluation method for the degree of corrosion of materials will be developed.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Material Chemistry Radiation Measurements and Instruments

No.	28
Theme	Research and development of smart irradiation technology
Department	Nuclear Science and Engineering Center
Section	Research Group for Radiation Materials Engineering
Location	Tokai (Nuclear Science Research Institute)
ContactPerson *Replace [at] with @	Nariaki Okubo Tel : +81-29-282-6212 E-mail : oubo.nariaki[at]jaea.go.jp
Summary	The candidate is expected to elucidate the effects of irradiation in the in-core environment on material properties for accident tolerant fuel （ATF）for light water reactors and fuel cladding and beam window materials used for accelerator-driven transmutation systems (ADS).Microstructural observation of materials irradiated under various environmental conditions, various mechanical strength tests (tensile, fatigue, creep, etc.), development of small specimen testing technology, analysis under in-situ irradiation will be conducted to evaluate the correlation between microstructural evolutions and strength property changes, irradiation damage behavior. The superposition effects of nuclear environmental factors (irradiation, heat load, stress, atmosphere, etc.) and irradiation conditions will be investigated. The development of smart irradiation technology that can handle reactor irradiation materials rationally will be also expected in cooperation with the modeling team.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Material Radiation Mechanics Measurements and Instruments

No.	29
Theme	Improvement of evaluation technology of nuclear fuel and fission products behaviors toward the enhancement of nuclear safety
Department	Nuclear Science and Engineering Center
Section	Research Group for High Temperature Science on Fuel Materials
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Shuhei Miwa Tel : +81-29-282-5379 E-mail : miwa.shuhei[at]jaea.go.jp
Summary	We perform fundamental research contributing to the safety enhancement of light water reactors and so on by acquiring basic data, clarifying mechanisms, and modeling the physical properties of nuclear fuel and the behavior of fission products (FPs) in severe accidents, and are constructing a database that will contribute to the improvement of analysis codes. In this research topic, the applicant will either engage in the study of the physical properties and irradiation behavior of a new type of high burnup fuel (using simulated irradiated fuel), or in the study of the FP behavior under severe accidents, of which the applicant will acquire the basic data, clarify the mechanisms involved, and develops computational methods. This study will be carried out in collaboration with the researchers in our group. The main target of study such as the type of fuels may be adjusted according to the specialization of the applicant.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Chemistry Material Computer and Information

No.	30
Theme	Research and development on nuclear data
Department	Nuclear Science and Engineering Center, Nuclear Science Research Institute
Section	Nuclear Data Center
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Osamu Iwamoto Tel : +81-29-282-5480 E-mail : iwamoto.osamu[at]jaea.go.jp
Summary	In order to contribute to research and development of nuclear energy and various uses of radiation toward the realization of a sustainable society, we conduct research on nuclear data related to nuclear reactions and decay, which form the basis of these. For development of nuclear data library JENDL, applicants can select research topics of (1) study on nuclear data measurement using facilities in J-PARC and others, (2) theoretical study on nuclear reaction and structure, (3) study on nuclear data evaluation for the nuclear data library development. (Works on radiation or non-radiation depend on the selected topics.)
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Radiation Applied Physics Measurements and Instruments Computer and Information

No.	31
Theme	Research and developments of nondestructive analytical techniques using radiation sources
Department	Nuclear Science and Engineering Center
Section	Research Group for Nuclear Sensing
Location	Tokai (Nuclear Science Research Institute)
ContactPerson *Replace [at] with @	Yosuke Toh Tel : +81 29 282 6211 E-mail : toh.yosuke[at]jaea.go.jp
Summary	Developments of nondestructive analytical techniques are required in many fields such as nuclear transmutation, nuclear decommission, nuclear security, material science and radiation therapy.This study focuses on the research and development of radiation measurement techniques required for the analysis of nuclear fuel materials, radioactive materials, and therapeutic agents for nuclear medicine, utilizing neutrons, alpha particles, gamma rays, and other radiation sources. Specifically, research activities include the development of novel radiation measurement techniques and radiation detectors, as well as applied research utilizing these techniques. The research can be conducted at various facilities, including the Accurate Neutron Nucleus Reaction measurement Instruments (ANNRI) at the Japan Proton Accelerator Complex (J-PARC), tandem accelerator facilities, and other experimental sites.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Applied Physics Radiation Measurements and Instruments Applied Chemistry Other

No.	32
Theme	Study on greenhouse gas dynamics and climate change prediction, using radioactive and stable carbon isotope analyses
Department	Nuclear Science and Engineering Center
Section	Research Group for Environmental Science
Location	Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Jun Koarashi Tel : +81-29-282-5903 E-mail : koarashi.jun[at]jaea.go.jp
Summary	Climate change is one of the greatest threats to human well-being. Global warmig is the main driver of a range of climate change-related phenomena and the main cause of the global warming is the increase in greenhouse gases such carbon dioxide (CO2) and methane in the atmosphere. Soils are a huge source of CO2 emission and also can play a role as a source and a sink of methane. Therefore, understanding the exchange of greenhouse gasses via soils and its response to global warming is essential for predicting Earth's climate in the future. This study aims to reveal mechanisms contolling the greenhouse gas dynamics via soils using radioactive (14C) and stable carbon isotope analyses and to evaluate the climate change-carbon cycle feedback in terrestrial ecosystems using modelling approaches.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Geo and Environemtal Sciences Biology Chemistry Measurements and Instruments

No.	33
Theme	Improvement of the Particle and Heavy Ion Transport code System PHITS and its applications to life, material, medical, and space sciences
Department	Nuclear Science and Engineering Center
Section	Research Group for Radiation Transport Analysis
Location	Tokai, Nuclear Science Research Institute
ContactPerson *Replace [at] with @	Tatsuhiko Sato Tel : +81-29-282-5803 E-mail : sato.tatsuhiko[at]jaea.go.jp
Summary	Particle and Heavy Ion Transport code System (PHITS) is a multi-purpose Monte Carlo particle transport simulation code developed in JAEA. This study is dedicated to improving PHITS and extending its application fields to various research areas such as life, material, medical, and space sciences. We look forward to innovative proposals from young researchers.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Radiation Computer and Information Biology Material Geo and Environemtal Sciences Applied Physics

No.	34
Theme	Research of radiolysis reactions relating treatment and disposal of radioactive waste
Department	Nucelar Science Research Institue, Nuclear Science and Engineering Center（https://nsec.jaea.go.jp/）
Section	Research Group for Nucelar Chemistry（https://nsec.jaea.go.jp/nuclchem/）
Location	Nucelar Science Research Institue, Tokai-mura
ContactPerson *Replace [at] with @	Yuta Kumagai Tel : +81-29-282-5268 E-mail : kumagai.yuta[at]jaea.go.jp
Summary	For safe operation of the treatment and disposal of spent nuclear fuel and radioactive waste, it is necessary to understand the effects of chemical reactions that occur due to the radiolysis of materials. This research topic covers vearious radiation effects on materials used in nuclear engineering: hydrogen generation from radioactive waste through radiolysis, chemical changes in waste forms, deterioration and decomposition reactions of extraction solvents used in reprocessing and separation, and radiolysis of groundwater during disposal of radioactive wastes. We will conduct research to obtain new knowledge about radiolysis through experiments, elucidate the mechanism of chemical reactions, and develop more reliable computation models. （https://nsec.jaea.go.jp/nuclchem/researches/）
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Chemistry Radiation Applied Chemistry Physics

No.	35
Theme	Study on exotic phenomena in strongly correlated electron systems by complementary use of neutrons and synchrotron radiation
Department	Materials Sciences Research Center, Nuclear Science Research Institute, Sector of Nuclear Science Reseach
Section	Strongly Correlated Materials Research Group
Location	Tokai（NSRI)
ContactPerson *Replace [at] with @	Katsuaki Kodama Tel : +81-29-282-6474 E-mail : kodama.katsuaki[at]jaea.go.jp
Summary	We are engaged in development of neutron scattering technique and research on relationship between structural characteristics and functional properties of advanced materials. A successful candidate will study exotic phenomena in strongly correlated electron systems by using neutrons and synchrotron radiation instruments installed at JRR-3, J-PARC and .SPring-8. Further, he/she can also develop the neutron scattering technique and data analysis for triple-axis spectrometer, high-resolution powder diffractometer and reflectometer which are 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. Publication list : （https://msrc.jaea.go.jp/jp/result/publications/kyousou/） Beam experimental instruments : （https://msrc.jaea.go.jp/jp/device/） Project JAEA "Towards the restarting of the Japan Research Reactor No.3 (JRR-3)" : （https://www.jaea.go.jp/atomic_portal/jaea_channel/40/）
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Applied Physics Material Measurements and Instruments

No.	36
Theme	Advanced materials research contributing to carbon neutrality by comprehensively ultizing quantum beams
Department	Nuclear Science Research InstituteMaterials Sciences Research Center
Section	Hierarchical Structure Research Group
Location	Tokai(NSRI)
ContactPerson *Replace [at] with @	Takahisa Shobu Tel : +81-4905-2775 E-mail : shobu.takahisa[at]jaea.go.jp
Summary	Materials Sciences Research Center promotes the various research and development of advanced materials based on the elucidation of the internal correlation between their structures and functions by upgrading and applying neutron evaluation technology. In this research theme, through making good use of our large quantum beam facilities including the research reactor JRR-3, the pulsed neutron source J-PARC MLF and the large synchrotron radiation facility SPring-8, during the challenging to the resolution of current important issues that we should address such as radioactive waste disposal and recycling, the advanced research and development of functional materials will be also carried out to contribute to carbon neutrality towards their implementation in society. Young researchers who can work on this theme with enthusiasm and initiative are welcome to apply, regardless of their previous experience or expertise. Publication list : （https://msrc.jaea.go.jp/jp/result/publications/kaiso/） Beam experimental instruments : （https://msrc.jaea.go.jp/jp/device/） Project JAEA "Towards the restarting of the Japan Research Reactor No.3 (JRR-3)" : （https://www.jaea.go.jp/atomic_portal/jaea_channel/40/）
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Mechanics Material Applied Physics Measurements and Instruments Chemistry Radiation Architectural and Civil Engineering

No.	37
Theme	Development of functional materials based on soil clay minerals for sustainable resource use
Department	Materials Sciences Research Center, Nuclear Science Research Institute, Sector of Nuclear Science Reseach
Section	Actinide Sciences Research Group,Energy and EnvironmentMaterials Science Division
Location	Tokai（NSRI)
ContactPerson *Replace [at] with @	Mitsunori Honda Tel : +81-29-282-5832 E-mail : honda.mitsunori[at]jaea.go.jp
Summary	The Materials Sciences Research Center conducts research on the development of various materials aimed at realizing a sustainable society by applying analytical techniques such as synchrotron radiation. In this research theme, we explore the potential of soil clay minerals, which are abundant and environmentally friendly on Earth, from the viewpoint that sustainable use of limited resources is indispensable to improve energy self-sufficiency and achieve carbon neutrality in modern society. We will develop new functional materials by fully utilizing our proprietary molten salt method. Specifically, we aim to create thermoelectric conversion materials from soil clay minerals and conduct research on their elementalization and modularization, as well as develop humidity sensor materials. Through the synthesis of various crystals using the molten salt method, the obtained crystals will undergo detailed compositional and structural analysis via fluorescent X-ray analysis, X-ray diffraction analysis, infrared absorption spectrum analysis, and synchrotron radiation X-ray analysis. Furthermore, thermoelectric performance metrics such as conductivity, Seebeck coefficient, and thermal diffusivity will be evaluated using thermoelectric property evaluation equipment, with the aim of establishing modularization and evaluation methods. We will also utilize specific surface area and pore distribution measurement equipment to assess material properties through the evaluation of pore distribution and surface hydrophilicity/hydrophobicity. Although experience in this field is desirable, young researchers who can work on this theme with enthusiasm and initiative are welcome to apply, regardless of their previous experience or expertise. https://msrc.jaea.go.jp/jp/result/publications/actinoid/ https://arim.jaea.go.jp/jp/device.html
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Material Geo and Environemtal Sciences Applied Physics Measurements and Instruments Physics Chemistry

No.	38
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 EnvironmentMaterials 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. https://msrc.jaea.go.jp/jp/result/publications/actinoid/ https://arim.jaea.go.jp/jp/device.html https://arim.jaea.go.jp/jp/beamline.html
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Applied Physics Measurements and Instruments Material

No.	39
Theme	Development of a valence state analysis in environmental samples using a high-energy x-ray microbeam 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 EnvironmentMaterials 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. https://msrc.jaea.go.jp/jp/result/publications/actinoid/ https://arim.jaea.go.jp/jp/device.html https://arim.jaea.go.jp/jp/beamline.html
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Geo and Environemtal Sciences Measurements and Instruments Chemistry Radiation Physics

No.	40
Theme	X-ray absorption spectroscopy study on the reaction mechanism of energy conversion materials
Department	Materials Sciences Research Center, Nuclear Science Research Institute
Section	Advanced Energy Materials Research Group,Energy and EnvironmentMaterials 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 advance 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. We will aim for the creation of wide research connection group by upgrading to the more attractive equipment. https://msrc.jaea.go.jp/jp/result/publications/energy/ https://arim.jaea.go.jp/jp/device.html https://arim.jaea.go.jp/jp/beamline.html
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Chemistry Material Applied Chemistry Measurements and Instruments

No.	41
Theme	Research and development for improving a beam performance in J-PARC 3 GeV Synchrotron
Department	J-PARC Center
Section	Accelerator DivisionAccelerator Section II
Location	J-PARC
ContactPerson *Replace [at] with @	Masanobu Yamamoto Tel : +81-29-284-3175 E-mail : masanobu.yamamoto[at]j-parc.jp
Summary	Increasing a beam power toward a 1 MW in progress at J-PARC accelerators. The reduction of the beam loss and prolonging the life time of the accelerator components are important for the stable accelerator operation. In this research program, (1) the evaluation and experimental verification of the effect by the beam loss on the accelerator components, (2) the evaluation of the beam dynamics and beam diagnostics, (3) the consolidation of the vacuum system and the development of the charge exchange stripping foil are investigated on J-PARC 3 GeV rapid cycling synchrotron.
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	Research and development of diffraction method using polarized neutrons for material science
Department	J-PARC Center
Section	Neutron Science Section, Materials and Life Science Division
Location	J-PARC
ContactPerson *Replace [at] with @	Ryoji Kiyanagi Tel : +81-29-287-9608 E-mail : ryoji.kiyanagi[at]j-parc.jp
Summary	SENJU is the single crystal neutron diffractometer installed at BL18 in the Materials and Life Science Experimental Facility (MLF) at J-PARC and has been in operation for a decade. Currently, the instrument is seeking opportunities to incorporate polarized neutrons. The successful candidate will be involved in researching and developing polarized devices and data analysis methods for material research. (https://mlfinfo.jp/en/bl18/)
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Chemistry Material Applied Physics Measurements and Instruments

No.	43
Theme	Nano-structure and dynamics of soft matter interfaces studied by neutron techniques
Department	J-PARC Center
Section	Neutron Science Section, Materials and Life Science Division
Location	J-PARC
ContactPerson *Replace [at] with @	Hiroyuki Aoki Tel : +81-29-284-3333 E-mail : hiroyuki.aoki[at]j-parc.jp
Summary	The various properties at the surface and interface of softmatters such as polymer materials are different from those in the bulk state. This research project investigate the origin of the surface/interface-specific properties of softmatters by neutron techniques. The strucutre and dynamics at the surface and interfaces is examined by neutron scattering/reflectometry methods using labeled samples prepared in the deuteration laboratoty in the Materials and Life Science Experimental Facility at J-PARC.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Material Applied Physics Applied Chemistry

No.	44
Theme	R&D on liquid lead-bismuth target technology and proton beam technology for accelerator-driven nuclear transmutation system (ADS)
Department	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	As an initiative to solve the problem of radioactive waste in order to achieve a decarbonized society, 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 hydraulic properties and materials corrosion behavior using liquid lead-bismuth test loops and 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 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.	45
Theme	Research on performance improvement of linac in J-PARC accelerators
Department	J-PARC Center
Section	Accelerator DivisionAccelerator 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.	46
Theme	Study on high performance beam diagnostic system of J-PARC accelerator
Department	J-PARC Center
Section	Accelerator DivisionAccelerator Section 3
Location	J-PARC
ContactPerson *Replace [at] with @	Junichiro Kamiya Tel : +81-29-284-3164 E-mail : kamiya.junichiro[at]jaea.go.jp
Summary	Since J-PARC is a multi-purpose accelerator, simultaneous operation of different feeders requires optimization of the operating conditions for each feeder using a beam diagnostics system. In addition, input timing and output data to the beam diagnostics system, etc., must be strictly controlled for each operation mode, which makes it necessary to upgrade the system, including the control system. Furthermore, basic studies on the physics and chemistry of surfaces and materials are necessary to understand vacuum phenomena such as the interaction between ions and walls during high-intensity beam output. In this theme, research and development of elemental technologies for upgrading not only the beam diagnostic system but also various diagnostic, control, and vacuum systems including other components will be conducted. Through this, we aim to contribute to the realization of a facility that provides highly stable operation of accelerators and high-quality beams to all users. More specifically, the postdoctoral researcher will develop a beam diagnostic system that can be used even at high intensity, develop a timing and data acquisition system that can be distinguished for each supplier, develop a system for recording and predicting when equipment malfunctions and their signs, and develop equipment for an ultra-high vacuum system. Postdoctoral fellows may work on one or more of these topics.
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Mechanics Radiation Electricity and Electronics Material Computer and Information

No.	47
Theme	Study on performance improvement of power supply for J-PARC accelerator
Department	J-PARC Center
Section	Accelerator DivisionAccelerator Section IV
Location	J-PARC
ContactPerson *Replace [at] with @	Tomohiro Takayanagi Tel : +81-29-284-3164 E-mail : tomohiro.takayanagi[at]j-parc.jp
Summary	At J-PARC, the accelerator is being upgraded to achieve stable operation at a maximum output of 1 MW, based on the mid-to long-term plan for the facility. To achieve this goal, it is essential to consider upgrading the accelerator power supply. In this theme, research and development of a new type of power supply using SiC power devices, one of the next-generation power semiconductors, will be carried out to achieve smaller size, lower power consumption, and higher efficiency compared to conventional power supplies using 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.	48
Theme	Structure and dynamics of soft matters studied by isotope labeling methods
Department	J-PARC Center
Section	Technology Development
Location	J-PARC
ContactPerson *Replace [at] with @	Takashi Oda Tel : +81-29-287-9618 E-mail : takashi.oda[at]j-parc.jp
Summary	Unique functions of soft matter, such as proteins, lipids 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）	Biology Material Applied Chemistry

No.	49
Theme	Development and application of a He-3 spin filter for neutron scattering experiments
Department	J-PARC Center
Section	Technology Development
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.	50
Theme	R&D on the multilayer optics for polarized neutrons
Department	J-PARC Center
Section	Neutron Instrumentation Section,Materials and Life Science Division
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.	51
Theme	Development of scintillator-based or gas-based neutron detectors at Materials and Life Science Facility of J-PARC
Department	J-PARC Center
Section	Neutron Instrumentation Section,Materials and Life Science Division
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 the 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.	52
Theme	Research on dynamics in condensed matter using inelastic neutron scattering instruments and related technological developments
Department	J-PARC Center
Section	Neutron Science Section, Materials and Life Science Division
Location	J-PARC
ContactPerson *Replace [at] with @	Ryoichi Kajimoto Tel : +81-29-284-3197 E-mail : ryoichi.kajimoto[at]j-parc.jp
Summary	The inelastic neutron scattering instrument 4SEASONS installed in the Materials and Life Science Experimental Facility at J-PARC can measure spin, lattice, and atomic dynamics in the energy region from a few meV to several hundred meV, and is widely used by domestic and international users to study superconductors, quantum magnets, dielectrics, thermoelectric materials, structural materials, etc. In this theme, the successful candidate will conduct research on dynamics in condensed matter using neutron scattering instruments including 4SEASONS, and be engaged in hardware and software developments to keep 4SEASONS a world-class instrument. (https://mlfinfo.jp/en/bl01/)
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Physics Chemistry Material Applied Physics Measurements and Instruments

No.	53
Theme	Application of advanced computational / information science on neutron scattering measurements and analyses at a pulsed neutron source facility
Department	J-PARC Center
Section	Technology Development
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/infomration 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 or utilizing aritificial neural netowork to denoise the experimental spectra by preparing the adequate training data sets. The postdoctoral fellow shall willingly discuss on the targeted method with staffs in tecnology development section and related 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.	54
Theme	Research on Engineering Materials Using Pulsed Neutron Diffraction
Department	J-PARC Center
Section	Neutron Science Section, Materials and Life Science Division
Location	J-PARC
ContactPerson *Replace [at] with @	Takuro Kawasaki Tel : +81-29-287-9631 E-mail : takuro.kawasaki[at]j-parc.jp
Summary	In this research theme, studies are conducted using neutron diffraction and scattering devices, focusing on the engineering materials diffractometer TAKUMI in the Materials and Life Science Experimental Facility at J-PARC. Research involves investigating the correlation between the structure and mechanical and other properties of various structural metal materials such as steel, as well as functional materials such as ferroelectric ceramics and solid electrolytes. Furthermore, development of sample environmental equipment and measurement/analysis methods necessary for advancing the research is undertaken. (https://mlfinfo.jp/en/bl19/)
Radiation Worker/ Non-RadiationWorker	Radiation Worker
Field (for reference）	Applied Physics Material Measurements and Instruments

No.	55
Theme	Development of a water leak detection system for a steam generator of a sodium cooled fast reactor
Department	Strategy and Manegement Department
Section	Advenced Reacotr Development Promotion Group
Location	Oarai Research and Development Institute
ContactPerson *Replace [at] with @	Atsushi KATO Tel : +81-29-267-1919, (ext.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 Measurements and Instruments Chemical Engineering Computer and Information

No.	56
Theme	Numerical Simulation Code Development for Mechanistic Source Term Anylysis for Fast Rreactor Systems
Department	Fast Reactor Life-cycle Safety and Integrity Evaluation Technology Development DepartmentFast Reactor Cycle System Research and Development Center
Section	Reactor Safety Evaluation Group
Location	Oarai Research and Development Institute
ContactPerson *Replace [at] with @	Yasushi OKANO Tel : +81-29-267-1919 (ext.6700) E-mail : okano.yasushi[at]jaea.go.jp
Summary	JAEA is developing a numerical simulation code for source term analysis for fast reactor systems where the transport of radioactive materials from fuel pins of a reactor core to a containment vessel under accidental conditions is calculated using physical and chemical mechanistic models. The R&D includes performing numerical modeling, code development, and benchmark analysis.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Chemistry Mechanics Computer and Information

No.	57
Theme	Research and developlment of risk assesment methodology for sodium-cooled fast reactors
Department	Fast Reactor Life-Cycle Safety and Integrity Evaluation Technology Development DepartmentFast Reactor Cycle System Research and Development Center
Section	Fast Reactor Safety Design Group
Location	Oarai Research & Development Institute
ContactPerson *Replace [at] with @	Kenichi KURISAKA Tel : +81-29-267-1919 (ext.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.	58
Theme	Dynamic PRA Methodology Development for Fast Reactor Systems
Department	Fast Reactor Life-cycle Safety and Integrity Evaluation Technology Development DepartmentFast Reactor Cycle System Research and Development Center
Section	Reactor Safety Evaluation Group
Location	Oarai Research and Development Institute
ContactPerson *Replace [at] with @	Yasushi OKANO Tel : +81-29-267-1919 (ext.6700) E-mail : okano.yasushi[at]jaea.go.jp
Summary	As a PRA (Probabilistic Risk Assessment) for fast reactors, JAEA is developing dynamic PRA method development using the Petri-net (PN) method and CMMC (continuous Markov process Monte Carlo) method with plant dynamic system codes. The R&D includes performing numerical modeling, code development, and benchmark analysis.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Physics Chemistry Mechanics Computer and Information

No.	59
Theme	R&D on establishment of mid-and-long-term behavior estimation method for a cementitious solidified product
Department	Nuclear Backend Technology CenterNuclear Fuel Cycle Engineering Laboratories
Section	Waste Treatment Technology Section, Decommissioning Technology Department
Location	Tokai-mura, Ibaraki (Nuclear Fuel Cycle Engineering Laboratories)
ContactPerson *Replace [at] with @	OSUGI Takeshi Tel : +81-29-282-1133 (ext. 65700) E-mail : ncl-saiyo[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.	60
Theme	R&D on Robot Technology for Radioactive Waste Processing
Department	Nuclear Backend Technology CenterNuclear Fuel Cycle Engineering Laboratories
Section	Waste Treatment Technology Section, Decommissioning Technology Department
Location	Tokai-mura, Ibaraki (Nuclear Fuel Cycle Engineering Laboratories)
ContactPerson *Replace [at] with @	OSUGI Takeshi Tel : +81-29-282-1133 (ext. 65700) E-mail : ncl-saiyo[at]jaea.go.jp
Summary	The separation and disassembly of radioactive waste at nuclear facilities are primarily manual processes, with reducing exposure and improving efficiency as ongoing challenges. This R&D project attempts to apply robotic technology to radioactive waste treatment to improve safety and reduce costs.The plan includes testing cutting, disassembling, and moving simulated wastes, such as exhaust filters, using industrial robots (manipulators/control devices), collaborative robots, and cameras. These tasks will be managed through master-slave remote control and enhanced by semi-autonomous control using deep learning models.
Radiation Worker/ Non-RadiationWorker	Non-Radiation Worker
Field (for reference）	Mechanics Material Electricity and Electronics Architectural and Civil Engineering Applied Physics Computer and Information Robotics