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Recruitment

Recruitment for Postdoctoral Fellow
(Fixed-term researcher)

  1. Physics Chemistry Mathematics Geo and Environemtal Sciences Biology Radiation
    Mechanics Material Electricity and Electronics Architectural and Civil Engineering Applied Physics Applied Chemistry
    Chemical Engineering Measurements and Instruments Computer and Information Nuclear Nonproliferation and
    Nuclear Security
    Other All
  2. No Theme
    Department Section Location Contact Person Radiation Worker/
    Non-Radiation Worker
    Field
    (for reference)
    Summary
    J1Research on measures to strengthen nuclear nonproliferation and nuclear security
    Integrated Support Center for Nuclear Nonproliferation and Nuclear SecurityPolicy Research OfficeHead OfficeKazunori SUDA (Mr.)
    Tel: +81-29-282-0495
    E-mail: suda.kazunori@jaea.go.jp
    Non-Radiation WorkerNuclear Nonproliferation and Nuclear Security,
    Other
    In consideration of importance and necessity of enhancing nuclear nonproliferation and nuclear security, a post-doctoral fellow is expected to conduct various researches and analyses on nuclear nonproliferation and nuclear security issues, including how to utilize synergy effects when implementing technical measures on nuclear safeguards and security, risk assessment when utilizing such effects, and how to minimize such risks. The fellow is also expected to carry out studies on how to strengthen international regime on both nuclear nonproliferation and nuclear security.
    J2Study on feasibility and effectiveness evaluation for severe accident countermeasures
    Nuclear Safety Research CenterSevere Accident Analysis Research GroupNuclear Science Research InstituteTomoyuki Sugiyama
    Tel: +81-29-282-5253
    E-mail: sugiyama.tomoyuki@jaea.go.jp
    Non-Radiation WorkerPhysics,
    Chemistry,
    Mechanics,
    Applied Physics,
    Chemical Engineering,
    Other
    This research aims at development of analysis models and tools to improve evaluation techniques of severe accident countermeasures. One of the following tasks or that related to the tasks is carried out.
    - Source term analysis of Fukushima daiichi NPS accident using the SA analysis code THALES2/KICHE.
    - Analysis of fluid dynamic behaviors of core melt in containment vessel using the mechanistic FCI code JASMINE.
    - Analysis of thermal-hydraulic and deflagration/detonation behaviors of hydrogen in containment vessel or reactor building using the open CFD code OpenFOAM.
    J3Experimental and analytical studies on the fuel behavior under accident conditions of light-water-reactor
    Nuclear Safety Research CenterFuel Safety Research GroupNuclear Science Research InstituteMasaki Amaya
    Tel: +81-29-282-5028
    E-mail: amaya.masaki@jaea.go.jp
    Non-Radiation WorkerMechanics,
    Material,
    Electricity and Electronics,
    Measurements and Instruments,
    Computer and Information,
    Physics,
    Chemistry
    The objective of this study is to develop and/or improve models concerning fuel behavior under reactivity-initiated accidents (RIAs), loss-of-coolant accidents (LOCAs), etc. by conducting experiments on light-water-reactor fuel and/or analyses using calculation codes etc. The following or related studies will be carried out.
    ・Model development and evaluation by using calculation codes etc., concerning effects of the deformation of fuel cladding tube and axial relocation of fuel pellets inside the fuel rod on the fuel temperature during LOCAs.
    ・Analysis and model improvement in terms of fuel dispersal behavior following failures of fuel cladding tube during accidents by using calculation codes etc.
    J4Study on material degradation and integrity evaluation of nuclear reactor components
    Nuclear Safety Research CenterMaterials and Water Chemistry Research GroupNuclear Science Research InstituteSatoshi Hanawa
    Tel: +81-29-282-5044
    E-mail: hanawa.satoshi@jaea.go.jp
    Radiation WorkerMechanics,
    Material,
    Measurements and Instruments
    Integrity of nuclear reactor components such as reactor pressure vessel (RPV) for long-term operation should be confirmed by the latest scientific knowledge. In order to enhance the knowledge for evaluating the structural integrity of the components, effect of environmental conditions such as neutron irradiation, high temperature-high pressure coolant on material degradation is investigated by micro-structural analysis and mechanical testing. Not only from the viewpoint of material degradation mentioned above, but the approach by fracture mechanics is also performed.
    J5Study on the methodology of estimation of property changes in radioactive waste disposal system due to natural events
    Nuclear Safety Research CenterEnvironmental Safety Research GroupNuclear Science Research InstituteSeiji Takeda
    Tel: +81-29-282-6170
    E-mail: takeda.seiji@jaea.go.jp
    Non-Radiation WorkerPhysics,
    Chemistry,
    Geo and Environemtal Sciences,
    Computer and Information,
    Architectural and Civil Engineering,
    Measurements and Instruments
    In the safety assessment for a geological disposal of radioactive wastes, it is important to estimate the effect of property changes in radioactive waste disposal system resulting from the occurrence of natural events such as volcanic and magmatic activity, seismic activity, uplifts and denudation etc.. In this study, the methodologies for estimating the possibility of the occurrence and the effect of topographical, hydrological/hydrogeological, physical and geochemical response to geological and/or climatic factors are developed using previous observation and data characterized by the factors in Japan.
    J6Study on release and transport behavior of radioactive materials in reprocessing plant under severe accident conditions
    Nuclear Safety Research CenterFuel Cycle Safety Research GroupNuclear Science Research InstituteHitoshi Abe
    Tel: +81-29-282-6672
    E-mail: abe.hitoshi@jaea.go.jp
    Non-Radiation WorkerChemistry,
    Physics,
    Chemical Engineering
    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.
    J7Study on analytical techniques for individual particles containing nuclear materials in environmental samples
    Nuclear Safety Research CenterResearch Group for Safeguards Analytical ChemistyNuclear Science Research InstituteFumitaka Esaka
    Tel: +81-29-282-6165
    E-mail: esaka.fumitaka@jaea.go.jp
    Radiation WorkerChemistry,
    Physics
    Analysis of trace amounts of 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, analytical techniques for such samples are developed. For example, in order to clarify elemental composition, chemical states and isotopic composition, individual micron-sized particles containing uranium and/or plutonium are measured by using scanning electron microscopy, total-reflection X-ray analysis, micro-Raman spectroscopy and secondary ion mass spectrometry.
    J8Experimental Research on Safety Assessment of Storage and Disposal of Radioactive Waste
    Nuclear Safety Research CenterWaste Safety Research GroupNuclear Science Research InstituteToshikatsu Maeda
    Tel: +81-29-282-6001
    E-mail: maeda.toshikatsu@jaea.go.jp
    Radiation WorkerChemistry,
    Geo and Environemtal Sciences,
    Material
    Safety assessments of storage and disposal of radioactive wastes require quantitative analysis of long-term alteration of barrier materials used in storage and disposal systems. This study investigates long-term alteration behavior such as corrosion, dissolution redox reactions and colloid formation associated with glass, metals, clays, concretes and polyethlene focusing on primary factors such as adjacent barrier materials, groundwater composition, geology, microbes and radiolysis. The goal is to obtain scientific basis for models evaluating changes in the barrier functions and for systematical establishment of datasets. Methods for chemical analysis of radioactive wastes themselves are also investigated.
    J9Study on a Level 3 Probabilistic Risk Analysis of nuclear power plants
    Nuclear Safety Research CenterRadiation Risk Analysis Research GroupNuclear Science Research InstituteMasanori Kimura
    Tel: +81-29-282-5459
    E-mail: kimura.masanori@jaea.go.jp
    Non-Radiation WorkerPhysics,
    Chemistry,
    Mathematics,
    Geo and Environemtal Sciences,
    Radiation,
    Architectural and Civil Engineering,
    Computer and Information
    A level 3 probabilistic risk assessment (PRA) is an offsite consequence analysis for a severe accident and estimates the frequency and severity of the consequences to the public. Probabilistic accident consequence assessment models and computer codes are an integral part of level 3 PRA of nuclear power plants. Our research group has developed a level 3 PRA code, OSCAAR. In this theme, researches on the probabilistic accident consequence assessment for health effects and economic consequence are conducted considering site-dependent on metrological, population, agricultural and economic data by using OSCAAR.
    J10Experimental and analytical study on thermohydraulic safety of light water reactor
    Nuclear Safety Research CenterThermohydraulic Safety Research GroupNuclear Science Research InstituteYasuteru Sibamoto
    Tel: +81-29-282-5263
    E-mail: sibamoto.yasuteru@jaea.go.jp
    Non-Radiation WorkerMechanics,
    Measurements and Instruments,
    Computer and Information
    This experimental and analytical research focuses on thermo-hydraulic phenomena occurring in the reactor and the containment of the nuclear power plant during an accident before and after core damage. For the experimental study, two-phase flow and/or heat transfer are investigated using a high-pressure reactor simulation test facility or a small-scale test device that exits or will be built for this research. The development of the two-phase flow measurement technique is also an important topic for this research. By using the data obtained from the experiments, prediction models are validated and improved in order to be used in lumped parameter codes such as RELAP5 and MELCOR, or the CFD codes. A specific research topic will be selected considering the request by the applicant.
    J11Study on the methodology of the structural integrity assessment for nuclear reactor components
    Nuclear Safety Research CenterStructural Integrity Research GroupNuclear Science Research InstituteYinsheng Li
    Tel: +81-29-282-6457
    E-mail: li.yinsheng@jaea.go.jp
    Non-Radiation WorkerMechanics,
    Architectural and Civil Engineering,
    Material,
    Physics,
    Applied Physics,
    Measurements and Instruments,
    Computer and Information
    Due to the long term operation of some domestic nuclear power plants and occurrence of the earthquakes beyond the designed seismic ground motion, developing the methodologies of structural integrity assessments for the reactor components concerning seismic loading, impact loading 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 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
    - Advanced seismic safety and impact assessment research including development of three-dimensional evaluation models of nuclear facility buildings, components and piping systems, and numerical simulation considering nonlinear mechanical properties.
    J12Research on Criticality Safety/Management of Damaged- or Molten-Fuel formed by Severe Accidents
    Nuclear Safety Research CenterCriticality Safety Research GroupNuclear Science Research InstituteKotaro Tonoike
    Tel: +81-29-284-3762
    E-mail: tonoike.kotaro@jaea.go.jp
    Radiation WorkerPhysics,
    Computer and Information,
    Applied Physics,
    Other
    It is important to establish both the cooling and the criticality control of fuel debris after the severe accident, such as the Fukushima Daiichi accident, where large amount of fuel is damaged and melts. It is difficult, however, to control the situation of fuel debris and the coolant flow path, which leads the difficulty in securing the subcritical condition. Thus, the evaluation of re-criticality risk is necessary. In this research, critical mass, kinetic parameters, etc. of fuel debris will be obtained by computation; and critical experiments to validate the computation will be studied as well.
    J13Experimental and theoretical studies of exotic nuclei
    Advanced Science Research CenterSector of Nuclear Science ResearchNuclear Science Research InstituteKatsuhisa Nishio
    Tel: +81-29-282-5454
    E-mail: nishio.katsuhisa@jaea.go.jp
    Radiation WorkerPhysics,
    Mathematics,
    Radiation,
    Applied Physics,
    Measurements and Instruments,
    Computer and Information,
    Other
    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 theorey subjects nuclear structure and fission process will be studied by taking advantage of the JAEA supercomputer.
    (http://asrc.jaea.go.jp/soshiki/gr/HENS-gr/index_e.html)
    J14Nuclear Chemistry of superheavy elements
    Advanced Science Research CenterSector of Nuclear Science ResearchNuclear Science Research InstituteKazuaki Tsukada
    Tel: +81-29-282-5491
    E-mail: tsukada.kazuaki@jaea.go.jp
    Radiation WorkerChemistry,
    Physics,
    Radiation,
    Measurements and Instruments,
    Applied Chemistry
    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, and molecular formations. The subjects include development of the measuring system based on an "atom-at-a-time" method. These experiments will be performed at the JAEA Tandem Accelerator Facility.
    (http://asrc.jaea.go.jp/soshiki/gr/HENS-gr/nc/index-e.htm)
    J15Theoretical or Experimental Research for Hadron and Nuclear Physics at J-PARC
    Advanced Science Research CenterResearch Group for Hadron and Nuclear PhysicsNuclear Science Research InstituteHiroyuki Sako
    Tel: +81-29-284-3828
    E-mail: sako.hiroyuki@jaea.go.jp
    Radiation WorkerPhysics
    The successful candidate will work on either theoretical or experimental research of hadron and nuclear physics at J-PARC. The theoretical research includes hadron and nuclear physics related to J-PARC, and promotion of international theoretical research activities. The experimental research includes R&D of a fast DAQ system and detectors for J-PARC Heavy-Ion Program, and experimental studies with the kaon beamlines or the high-momentum beamline at J-PARC, RHIC, LHC, or KEKB.
    J16Materials physics in heavy element systems
    Advanced Science Research CenterResearch group for Materials physics for heavy element systemsNuclear Science Research InstituteShinsaku KAMBE
    Tel: +81-29-284-3525
    E-mail: kambe.shinsaku@jaea.go.jp
    Non-Radiation WorkerPhysics,
    Chemistry,
    Applied Physics,
    Material
    New electronic states in heavy element systems are investigated experimentally and theoretically. Especially magnetic and superconducting properties at low temperatures in bulk and thin film samples are focused.
    J17Theoretical study on spin-energy transformation materials
    Advanced Science Research CenterResearch Group for Spin-energy Transformation ScienceNuclear Science Research InstituteMichiyasu Mori
    Tel: +81-29-284-3508
    E-mail: mori.michiyasu@jaea.go.jp
    Non-Radiation WorkerPhysics
    A sucessful candidate will theoretically study spin- and thermal-transport properties using some numerical techniques such as density functional theory, density matrix renormalization group method, quantum Monte Carlo method and so on. Thermoelectric materials, primarily related to spin Seebeck effect, and radiation-proof devices will be also important subjects of candidate.
    J18Experimental study on spin-energy transformation materials
    Advanced Science Research CenterResearch Group for Spin-energy Transformation ScienceNuclear Science Research InstituteMichiyasu Mori
    Tel: +81-29-284-3508
    E-mail: mori.michiyasu@jaea.go.jp
    Non-Radiation WorkerPhysics
    The theme is the experimental study on spintronics based on a noble cocept of spin current generation / manipuration using mechanical motion and nuclear spin. We approach the phenomenon that originate in the interaction of nuclear spin and mechanical motion using spectroscopy methods including Nuclear Magnetic Resonance. Our goal is to esablish a experimental method of the noble cocept of spin current generation / manipuration decrived above.
    J19Interdisciplinary study on emergent properties of nanoscale structures by using advanced beams
    Advanced Science Research CenterResearch Group for Nanoscale Structure and Function of Advanced MaterialsNuclear Science Research InstituteShin-ichi Shamoto
    Tel: +81-29-284-3521
    E-mail: shamoto.shinichi@jaea.go.jp
    Radiation WorkerPhysics,
    Chemistry,
    Material,
    Applied Physics,
    Applied Chemistry,
    Measurements and Instruments
    Structures and physical properties of materials from single-layer to bulk will be studied by using the advanced beams (neutron, positron and muon) produced at accelerator and reactor based facilities such as J-PARC. Those experiences are not required but high motivation for the researches are preferred.
    J20 Study on Advanced Nuclear Materials by Nanostructure Control
    Advanced Science Research CenterResearch Group for Nanoscale Structure and Function of Advanced MaterialsNuclear Science Research InstituteSatoshi Yasuda
    Tel: +81-29-284-3504
    E-mail: yasuda.satoshi@jaea.go.jp
    Radiation WorkerMaterial,
    Applied Physics,
    Applied Chemistry,
    Electricity and Electronics
    Studies on nano-fabrication and characterization will be performed for novel multi-functionalized materials. Molecular beam epitaxial (MBE), scanning tunneling microscopy (STM) and electrochemical methods will be used for the research (e.g. elucidation of surface reaction and structures of surface oxygen sensor in liquid metal for partitioning and transmutation technology).
    J21Elucidation of circulation of dissolved organic matter in the ocean using radiocarbon as a tracer
    Nuclear Science and Engineering CenterReserch Group for Environmental ScienceNuclear Science Research InstituteShigeyoshi Otosaka
    Tel: +81-29-282-5171
    E-mail: otosaka.shigeyoshi@jaea.go.jp
    Non-Radiation WorkerGeo and Environemtal Sciences,
    Chemistry
    Dissolved organic matter (DOM) in seawater is known to play a role as a carrier for various materials, including radionuclides, in the ocean. In this study, “carbon age” of DOM in seawater collected in the North Pacific and its marginal seas are analyzed by radiocarbon measurement using an accelerator mass spectrometer (AMS). By adding information on "timescale" to the spatial distribution of DOM, the dynamics of the DOM-bound substances circulating in the ocean is elucidated.
    J22Study on Accurate Nuclear Data Measurement
    Nuclear Science and Engineering CenterNuclear Data CenterNuclear Science Research InstituteAtsushi Kimura
    Tel: +81-29-282-5796
    E-mail: kimura.atsushi04@jaea.go.jp
    Radiation WorkerPhysics,
    Measurements and Instruments,
    Radiation
    Accurate neutron cross sections for minor actinides (MAs) and long-lived fission products (LLFPs) are required for development of nuclear transmutation system. However, there are large gaps between current uncertainties and required uncertainties on these nuclear data. In order to decrease the uncertainties of the cross sections, we are carrying out neutron-TOF experiments using the high intensity pulsed neutron source at J-PARC. Since the increase of the neutron flux is in progress, it is essential to develop technologies related to data acquisition and data analysis especially designed for high count rate due to high neutron flux. In this theme, the assigned post doc fellow is requested to develop a fast data acquisition system and/or analysis methods (e.g. background evaluation due to scattering neutrons) in order to improve the accuracy of the nuclear data for MAs and LLFPs in wide neutron energy range.
    http://wwwndc.jaea.go.jp/Labo/
    J23Elucidation of radiation effects due to exposure from insoluble particle
    Nuclear Science and Engineering CenterResearch Group for Radiation Transport AnalysisNuclear Science Research InstituteTatsuhiko Sato
    Tel: +81-29-282-5803
    E-mail: sato.tatsuhiko@jaea.go.jp
    Radiation WorkerRadiation,
    Biology,
    Computer and Information,
    Measurements and Instruments
    When a person inhales insoluble cesium with high radioactivity (so-called, Cs-ball), radiation dose can be extremely high within a limited micro region. Then, radiation effects can differ between insoluble cesium and cesium in other chemical forms. Aims of this theme are to clarify physical characteristics for internal exposure from Cs-ball using the Particle and Heavy Ion Transport code System (PHITS) and to elucidate influences of the physical characteristics on radiation effects (e.g., cell population response) by experimental studies.
    J24Fission product behavior in the Primary Containment Vessel of Light Water Reactor
    Nuclear Science and Engineering CenterDevelopment Group for LWR Advanced TechnologyNuclear Science Research InstituteMasahiko Osaka
    Tel: +81-29-282-5922
    E-mail: ohsaka.masahiko@jaea.go.jp
    Radiation WorkerChemistry,
    Physics,
    Material,
    Chemical Engineering,
    Measurements and Instruments
    Fission product (FP) behavior in the Primary Containment Vessel (PCV) of Light Water Reactor (LWR) should be known for the estimation of FP amounts released into environment (source term estimation) in the case of severe accident. Simulant FP aerosol behavior is directly viewed and deposited aerosol is characterized by experiments in a small-sized model PCV. Results are analyzed by thermal-hydraulic and chemical analysis codes to interpret the aerosol behavior in PCV. Complementary experiment/analysis on the FP aerosol formation and deposit revaporization/resuspention behaviors would be conducted, for the comprehensive understanding of FP behavior in the PCV under various conditions of such as hydraulics, moisture content, surface status and so on. The research is conducted in collaboration with researchers in the group.
    J25Research and development of minor actinide separation process from high level liquid waste
    Nuclear Science and Engineering CenterResearch Group for PartitioningNuclear Science Research InstituteTatsuro Matsumura
    Tel: +81-29-282-6673
    E-mail: matsumura.tatsuro@jaea.go.jp
    Radiation WorkerChemistry,
    Applied Chemistry,
    Chemical Engineering
    In order to reduce the burden of the geological disposal of high level waste (HLW), we are investigating partitioning and transmutation technology. The separation of minor actinides from HLW is particularly important since they have high radiotoxity and long half lives. In this study, the novel extractants which has high selectivity of americium and curium from high level liquid waste will be studied and evaluated applicability for practical separation process, and the minor actinide separation process from HLW will be developed with the novel extractant. The experiments using minor actinides and high level liquid waste will be carried out in glove boxes and hot cells.
    J26Computational materials science for nuclear reactor structural materials
    Nuclear Science and Engineering CenterResearch Group for Radiation Materials EngineeringNuclear Science Research InstituteTomohito Tsuru
    Tel: +81-29-282-5198
    E-mail: tsuru.tomohito@jaea.go.jp
    Non-Radiation WorkerMechanics,
    Material
    The purpose of this study is to develop a computational approach for deformation and fracture process and explore fundamental mechnism of microscopic defect mechanics of structural materials. We look for PhD holder or candidate who is experienced in mechanics/thermodynamics calculations based on both ab-initio and molecular dynamics simulations for the deformation and fracture mechanics of structural materials.
    J27Development of new separation reagents for radioactive nuclides based on the coodination chemistry of the transition metal complexes
    Nuclear Science and Engineering CenterResearch Group for RadiochemistryNuclear Science Research InstituteMasayuki Watanabe
    Tel: +81-29-282-5167
    E-mail: watanabe.masayuki@jaea.go.jp
    Radiation WorkerChemistry,
    Physics,
    Geo and Environemtal Sciences
    Radioactive wastes resulting from spent nuclear fuel contain numerous d-block or f-block transition metals such as platinum group or rare earths metals, as fission products. In this project, the coordination chemistry and physical properties of d-block and f-block elements are identified by various types of spectroscopy in order to develop effective separation reagents for these transition metal cations. The applicant should have profound scholarly knowledge about the redox reaction and complexation of the metal cations in radioactive wastes.
    J28Electronic structure research of actinide and the related materials with synchrotron radiation X-ray spectroscopy
    Materials Sciences Research CenterElectronic Structure Research GroupEnergy and Environment Materials Science DivisionHiroshi Yamagami
    Tel: +81-791-58-2607
    E-mail: yamagami@cc.kyoto-su.ac.jp
    Radiation WorkerPhysics,
    Applied Physics,
    Material,
    Measurements and Instruments
    Our group is carrying out a research on electronic structure by synchotron radiation X-ray spectroscopies (soft x-ray angular-resolved photoemission, soft x-ray magnetic circular dichroism, and hard x-ray photoemission) at SPring-8 in order to elucidate a mechanism holding physical properties of actinides and the related materials including uranium compounds. Furthermore, we are engaged on Fukushima environmental recovery research and reactor decommissioning research. For going ahead with the above-mentioned research, our group will hope a researcher who can take part in a technical development on x-ray spectroscopy at beam lines of synchrotron radiation facility.
    J29Research for controlling chemical reaction by laser
    Materials Sciences Research CenterActinide Chemistry GroupEnergy and Environment Materials Science DivisionKeiichi Yokoyama
    Tel: +81-791-58-0971
    E-mail: yokoyama.keiichi@jaea.go.jp
    Radiation WorkerPhysics,
    Chemistry,
    Applied Physics
    Fundamental studies to explore controllability of valence states of metal ions in solution are to be conducted using ultrafast lasers, aiming at developing new schemes in the nuclear fuel reprocessing. With respect to the f-electron elements such as lanthanides, through monitoring their valency after multi-photon excitations mediated by f-f transitions, you are expected to integrate the fundamental knowledge relevant to photo-induced element-selective valence control techniques. Development and application of ultrafast lasers and some spectroscopic techniques are to be included.
    J30In situ studies of metallic materials using time-of-flight neutron diffraction
    J-PARC CenterMaterials and Life Science Directorate Neutron Science SectionJ-PARC CenterStefanus Harjo
    Tel: +81-29-284-3266
    E-mail: stefanus.harjo@j-parc.jp
    Radiation WorkerMaterial,
    Mechanics,
    Applied Physics,
    Physics,
    Measurements and Instruments
    A high-resolution & high-intensity time-of-flight neutron diffractometer (TAKUMI) was constructed and now is operated for researches on various engineering materials at the Material & Life Science Experimental Facility of J-PARC. In this theme, the following studies using TAKUMI for the advanced steels and advanced light metals are planned. (1) The relationship between the microstructure evolution during deformation and the mechanical & functional properties, (2) the relationship between microstructural evolution during thermo-mechanical treatment and the mechanical properties, and (3) development of in situ hybrid neutron diffraction measurement technique (concurrent measurements of digital image correlation method and infrared thermography) for various deformation tests. Supporting researches at TAKUMI are also required.
    J31Study of Performance Improvement for the J-PARC linac
    J-PARC CenterAccelerator DivisionJ-PARC CenterHidetomo Oguri
    Tel: +81-29-284-3132
    E-mail: oguri.hidetomo@jaea.go.jp
    Radiation WorkerPhysics,
    Applied Physics,
    Radiation,
    Electricity and Electronics,
    Measurements and Instruments
    The goal of the J-PARC proton accelerators is to achieve stable beam operation at 1 MW. The linac is a beam injector for the J-PARC accelerator. Beam loss reduction is crucial to increase beam power and to achieve stable operation. And also, long-lasting component and failure prediction diagnosis are important for reliable operation. The subject of this theme is to study of performance improvement for the J-PARC linac. He/she will perform a study of beam loss reduction theoretically or experimentally, or a development of long-lasting component or failure prediction diagnosis for stabler operation of the linac.
    J32The experimental study to elucidate the relationship between functions and dynamics of bio-macromolecules using deuterated samples
    J-PARC CenterNeutron Science SectionJ-PARC CenterKaoru Shibata
    Tel: +81-29-284-3199
    E-mail: shibata.kaoru@jaea.go.jp
    Radiation WorkerBiology,
    Chemistry,
    Measurements and Instruments
    By mainly using the inelastic and quasielastic scattering spectrometer DNA installed in J-PARC/MLF neutron facility, the corresponding researcher will perform the experimental study to investigate the relationship between functions and dynamics of bio-macromolecules, such as the molecular mechanisms of the functions of enzymatic proteins, using particularly the deuterated protein samples.
    Therefore, it will be given special importance that the corresponding researcher has the extensive experience of preparation of bio-macromolecules, especially proteins by using bacterial expression systems.
    The corresponding researcher will also be expected to perform the research assistance for the related research fields in addition to his/her own research.
    J33Development of scanning neutron microscope system
    J-PARC CenterTechnology Development SectionJ-PARC CenterKazuya Aizawa
    Tel: +81-29-284-3703
    E-mail: aizawa.kazuya@jaea.go.jp
    Radiation WorkerMeasurements and Instruments,
    Radiation,
    Electricity and Electronics,
    Applied Physics,
    Physics
    The employee will develop a neutron detector by new detection principle with fast readout and super-high spatial resolution based on superconducting detector in Materials and Life Science Experimental Facility at J-PARC. The goals of the theme are an establishment of an energy-dispersive scanning neutron-microscope system and its application to materials and life science research.
    J34Development of a He-3 neutron spin filter and promotion of research using pulsed polarized neutrons.
    J-PARC CenterTechnology Development SectionJ-PARC CenterTakayuki Oku
    Tel: +81-29-284-3196
    E-mail: takayuki.oku@j-parc.jp
    Radiation WorkerPhysics,
    Radiation,
    Material,
    Applied Physics,
    Measurements and Instruments
    At J-PARC MLF, a He-3 neutron spin filter (NSF) based on spin-exchange optical pumping method has been developed for the efficient utilization of pulsed neutrons. The employee will improve the He-3 NSF performance and adapt it to various kinds of experiments at J-PARC MLF. The employee will also develop sample environment which is optimized for use of the He-3 NSF, and will promote research using pulsed polarized neutrons.
    J35Research on advanced nuclear characterization method of accelerator driven transmutation system using J-PARC facility
    J-PARC CenterFacility and Application Development SectionJ-PARC CenterShin-ichiro Meigo
    Tel: +81-29-284-3207
    E-mail: meigo.shinichiro@jaea.go.jp
    Radiation WorkerPhysics,
    Radiation,
    Material
    For R&D to reduce of long-life radioactive waste with an accelerator-driven system (ADS), "ADS target test facility" is planned to be built as a part of nuclear transformation experiment facility (TEF) in J-PARC, which utilize spallation neutron produced at a lead-bismuth target irradiated with a 400-MeV proton beam. In this theme, basic nuclear data such as hydrogen and helium generation and DPA cross-sections will be measured by using J-PARC accelerator. The obtained data will be compared with model calculation such as a nucleon and meson transport calculation code (PHITS) to improve the nuclear reaction model, which is aimed to contribute to the optimization of the neutronics of the ADS.
    R&D on the partitioning and transmutation technology: http://snsr.jaea.go.jp/en/topics/pt.html"
    J36Research on concensus building of policies for fast reacor development
    Sector of Fast Reactor Research and DevelopmentPlanning and Co-ordination OfficeO-arai Research and Development CenterKiyoshi Ono
    Tel: +81-29-267-1919 (Ex.6470)
    E-mail: ono.kiyoshi@jaea.go.jp
    Non-Radiation WorkerOther
    The purpose of this reseasrch is to clarify the process of national consensus building by adopting social scientific approaches, and refelct it to the formulation of development strategies and policy recommendations. Specifically, analyses are performed on obstructive factors in siting, maintaining and developing facilites facing similar problems even though such facilites are required for maintaining the stable livelihood of the people, as well as the transition of fast reactor development at home and abroad. These analyses can cralify the process of consensus builing including roles of relevant entities to study what actions should be taken.
    https://www.jaea.go.jp/04/fast_reactor/
    J37Study of aging deterioration mechanism and preservation technology by using the material of Fugen NPP
    Fugen Decomissionning Engineering CenterPlant Material Examination SectionTsuruga headquartersYoshiaki Katano
    Tel: +81-770-26-1221
    E-mail: katano.yoshiaki@jaea.go.jp
    Radiation WorkerMaterial,
    Measurements and Instruments,
    Physics,
    Chemistry,
    Chemical Engineering,
    Computer and Information
    The operation period of a nuclear power plant is limited to 40 years by law in Japan. The Nuclear Regulation Authority (NRA) can extend the period by 20 years more when the plant passed the review of the NRA. By using the real used material of the “Fugen” NPP after 25 years operation, the research of the deterioration and preservation mechanism is carried out for the long-term integrity of nuclear facilities. The main study programs are aging mechanism related to embrittlement by corrosion, thermal and radiation characteristics, by using data obtained from the three-dimensional atom probe (3DAP), the electron beam backscattering diffraction (EBSD) and focused ion beam scanning electron microscope (FIB-SEM) in the laboratory of the Fugen site. Moreover, the study of mechanism theory is implemented by simulation technology of the microscopic stress analysis by ABAQUS and phase field method. In this way, it will contribute to the long-term integrity of the nuclear power plant, by investigating the aging deterioration mechanism and improving the preservation technology.
    J38Study on methodogies for modelling and analysis of geological environment
    Horonobe Underground Research CenterSedimentary Environment Research GroupHoronobe Underground Research CenterToshinori SATO
    Tel: +81-1632-5-2022
    E-mail: sato.toshinori@jaea.go.jp
    Non-Radiation WorkerPhysics,
    Geo and Environemtal Sciences,
    Architectural and Civil Engineering,
    Measurements and Instruments
    The Horonobe Underground Research Laboratory (URL) Project is being pursued to enhance the reliability of relevant disposal technologies through investigations of the deep geological environment within the host sedimentary formations at Horonobe, northern Hokkaido. The project consists of two major research areas, geoscientific research and R&D on geological disposal. One of theses, study on methodogies for modelling and analysis of geological environment, such as, geology, groundwater flow, geochemistry for long period have been performed. Modelling study for excavation disturbed zone and permeability of faults based on the results of in-situ and laboratory test also have been developed.
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    J39Research and development for modeling of hydrogeological heterogeneity of fractured crystalline rock
    Tono Geoscience CentorCrystalline Environment Research GroupTono Geoscience CentorHironori Onoe
    Tel: +81-572-66-2244
    E-mail: onoe.hironori@jaea.go.jp
    Non-Radiation WorkerGeo and Environemtal Sciences,
    Architectural and Civil Engineering,
    Computer and Information
    It is important to understand hydraulic heterogeneities influenced by presence of water conducting fractures and faults in fractured crystalline rock from the viewpoints of the sagety assessment og geological disposal of high-level radioactive waste. One of the research task is to establish comprehensive technigues for investigation, analysis and assessment of hydraulic heterogeneities in in fractured crystalline rock.
    Threfore, research and development for modeling method of hydrogeological heterogeneities of rock mass around the research gallery is located at several hundred meters depth will be carried out using the result of in-situ investigation and monitoring in the Mizunami Underground Research Laboratory at the Tono area, Central Japan.
    (https://www.jaea.go.jp/04/tono/tgc_e/index_e.html)
    J40Research and development for hydrogeological investigation of fractured crystalline rock
    Tono Geoscience CentorCrystalline Environment Research GroupTono Geoscience CentorRyuji Takeuchi
    Tel: +81-572-66-2244
    E-mail: takeuchi.ryuji@jaea.go.jp
    Non-Radiation WorkerGeo and Environemtal Sciences,
    Architectural and Civil Engineering
    It is important to understand hydraulic heterogeneities influenced by presence of water conducting fractures and faults in fractured crystalline rock from the viewpoints of the sagety assessment og geological disposal of high-level radioactive waste. One of the research task is to establish comprehensive technigues for investigation, analysis and assessment of hydraulic heterogeneities in in fractured crystalline rock.
    Threfore, research and development for hydrogeological investigation method of fractured crystalline rock will be carried out using the result of in-situ investigation and monitoring in the Mizunami Underground Research Laboratory Project and Regional Hydrogeological Study at the Tono area, Central Japan.
    (https://www.jaea.go.jp/04/tono/tgc_e/index_e.html)
    J41Ra which exists in the mineral Study about the physico-chemistry-like special quality of the isotope
    Ningyo-toge environmental engineering centerEnvironmental engineering Material R&D DivisionNingyo-toge Environmental Engineering CenterYoshiyuki Ohara
    Tel: +81-868-44-2211
    E-mail: ohara,yoshiyuki@jaea.go.jp
    Non-Radiation WorkerPhysics,
    Geo and Environemtal Sciences,
    Measurements and Instruments
    We are working on environmental restoration business of uranium mine which had ended mine activity at Ningyo-toge Environmental Engineering Center at present.
    It’s a very important problem for safe and efficient environmental restoration business to make clear the factor which ruled behavior of radioactive materials in the water conservation area in Ningyo-toge basin.
    Minerals containing naturally occurring uranium and thorium have isotopes of radium produced as progeny nuclides within their decay series. Isotopes of radium present in minerals are considered to have different physicochemical properties, reflecting the history (such as the mode of disintegration and the number of disintegration etc.) until they are produced. Therefore, in this study, by investigating the existence state of radium isotope in minerals, it contributes to making clear of the difference in elution behavior between radium isotopes. Also, a research of the difference in the existence state of radium isotopes between different kinds of minerals gives important knowledge when choosing matrix of solidified body of radioactive waste, and is important for promoting uranium mine environmental restoration project.
    F1Research on evaluation of middle and long term soundness for nuclear industry materials in radiation environment
    Collaborative Laboratories for Advanced Decommissioning Science (CLADS)Strage Equipment Soundness Evaluatuon GroupNuclear Science Reserch InstituteTakafumi Motooka
    Tel: +81-29-282-5950
    E-mail: motoka.takafumi@jaea.go.jp
    Radiation WorkerMechanics,
    Chemical Engineering,
    Applied Chemistry,
    Radiation,
    Material
    Reasearch on evaluation of meddle and long term soundness for nuclear industry materials in radiation environment will be conducted. Especifically, basic data on corrosion behavior was obtained by immersion test, electrochemical tests and so on under a wide range of environmental conditions taking into consideration the environment in Fukushima Daiichi nuclear power station (1F) where high radiation field was expected. We will elucify corrosion phenomena which can occur during the decommissioning of 1F.
    F2Studies on Radiolysis and Radiation Damege for Advanced Safety Control of Hydrogen (H2) in Nuclear Engineering
    Collaborative Laboratories for Advanced Decommissioning Science (CLADS)Strage Equipment Soundness Evaluatuon GroupNuclear Science Reserch InstituteRyuji Nagaishi
    Tel: +81-29-282-5493
    E-mail: nagaishi.ryuji@jaea.go.jp
    Radiation WorkerRadiation,
    Chemistry,
    Material,
    Other
    To realize advanced safety control of H2 generated in severe accidents in nuclear facilities, subsequent decommissioning and waste management, radiolysis of aqueous solution systems and radiation damage of materials such as adsorbents, catalysis and debris will be studied experimentally and analytically. Then their data will be applied to construction of analysis code for the H2 behavior, and to development of technologies for the reduction and prevention of accidents originated from the H2 generation.
    F3Research on radioactive material recovery and immobilization technology of radioactive waste
    Collaborative Laboratories for Advanced Decommissioning Science (CLADS)Waste Treatment Technology Development GroupNuclear Fuel Cycle Engineering LaboratoriesYoshikazu Koma
    Tel: +81-29-282-1133 (60661)
    E-mail: koma.yoshikazu@jaea.go.jp
    Non-Radiation WorkerGeo and Environemtal Sciences,
    Applied Chemistry,
    Material
    It is important to develop volume reduction and safety storage for a large amount of solid waste generated from the accident of Fukushima Daiichi Nuclear Power Station. Removal and recovery technology of radioactive material from the solid waste using subcritical water washing, volume reduction and immobilization technology of recovered material by inorganic solids like a functional glass are developed in this research.
    F4Mid- and Long-term stability of Fuel Debris
    Collaborative Laboratories for Advanced Decommissioning Science (CLADS)Fuel Debris Environmental Behavior Analysis GroupNuclear Fuel Cycle Engineering LaboratoriesTadahiro Washiya
    Tel: +81-29-282-1133(66003)
    E-mail: washiya.tadahiro@jaea.go.jp
    Radiation WorkerChemistry,
    Mathematics,
    Material
    Researcher will clarify the state of Pu in dominant phases of fuel debris and investigate chemical state of Pu such as the valent and solubilities of Pu in each phase and consider the possibility of Pu doposition in fuel debris
    F5Study for advancing measurement and analysis techniques of radiation and radioactive substances in the environment
    Fukushima Environmental Safety CenterFukushima Radiation Measurement GroupFukushimaMasanori Takeyasu
    Tel: +81-247-61-2911
    E-mail: takeyasu.masanori@jaea.go.jp
    Non-Radiation WorkerChemistry,
    Measurements and Instruments,
    Radiation,
    Geo and Environemtal Sciences
    The measurement results of radiation in the environment are examined, and the measurement method is optimizated in terms of time and spacial resolutions. Also, quick analytical methods are developmed for radioavtivity in environmental samples.
    By these, it is expected that the measurement method of air dose rate is advanced and that the radiocesium, Sr-90 and Tritium in various environmental samples are analysed and determined quickly.
    http://fukushima.jaea.go.jp/initiatives/cat01/pdf1511/2-2_takeishi.pdf
    F6Research and development of treatment method for radioactive wastes generated at the contaminated water treatment facility in Fukushima Daiichi Power Plant
    Advanced Science Research CenterResearch Group for Interfacial Reaction Field ChemistryNuclear Science Research InstituteNaofumi Kozai
    Tel: +81-29-282-6031
    E-mail: kozai.naofumi@jaea.go.jp
    Radiation WorkerChemistry,
    Geo and Environemtal Sciences,
    Material,
    Applied Chemistry
    At Fukushima Daiichi, radionuclides in the contaminated water have been removed according to thier physicochemical forms. Posttreatment method for disposal of those radionuclides collected by various materials has yet to be decided. This study aims to develop effective posttreatment methods for mainly long-life anionic radionuclides for which few effective treatment methods for geological disposal are known. The posttreatment methods for them include selective sepatarion (accumulation), conversion to stable inorganic form, and subsequent solidification.
    F7Exploration and elucidation of novel interaction between microorganisms and radionuclides
    Advanced Science Research CenterResearch Group for Interfacial Reaction Field ChemistryNuclear Science Research InstituteKazuya Tanaka
    Tel: +81-29-284-3518
    E-mail: tanaka.kazuya@jaea.go.jp
    Radiation WorkerChemistry,
    Mathematics,
    Geo and Environemtal Sciences,
    Biology,
    Applied Chemistry
    It is widely known that microorganisms affect the environmental migration behavior of radionuclides in various stiations. This theme performs fundamental research on microbial influence on the chemical states of radionuclides, the response of microorganisms to radionuclides, and microbial influence on interaction amongradionuclides, minerals, and plants. This study aims to discover and elucidate novel phenomena.
    F8Development of volume reduction of Cs-contaminated soil and elucidation of Cs sorption-desorption mechanism.
    Materials Sciences Research CenterActinide Chemistry GroupEnergy and Environment Materials Science DivisionHideaki Shiwaku
    Tel: +81-791-58-2615
    E-mail: shiwaku@spring8.or.jp
    Radiation WorkerChemistry,
    Physics,
    Geo and Environemtal Sciences,
    Chemical Engineering,
    Measurements and Instruments
    Radioactive cesium (Cs-134 and Cs-137) released to environment by the accident of TEPCO Fukushima Daiichi Nuclear Power Plant. Radioactive cesium was taken into soil in the environment after the accident immediately and produced enormous contaminated soil. Contaminated soil is planned to be exported outside Fukushima after 30 years. Therefore, the development study of the volume reduction of this contaminated soil is very important from the viewpoint of economic efficiency, environmental impact, radiation exposure, etc. In this study, structural analysis will be performed using synchrotron radiation (SPring-8) on the elucidation of radioactive cesium adsorption mechanism for farmland soil, including many clay minerals such as weathered biotite. We will contribute to environmental recovery of Fukushima.
    F9Research on cesium removal from contaminated soils and selective formation of the product by heat treatment
    Materials Sciences Research CenterAnalytical Sciences Development Research GroupNuclear Science Research InstituteMitsunori Honda
    Tel: +81-29-284-3928
    E-mail: honda.mitsunori@jaea.go.jp
    Radiation WorkerGeo and Environemtal Sciences,
    Radiation,
    Physics,
    Chemistry,
    Material
    Decontamination of a large quantity of radioactive cesium (Cs) released with The Fukushima Daiichi Nuclear Power Plant Accident is an urgent problem that should be solved. However, the decontamination method of the radioactive contamination soil is not established yet. We study Cs desorption mechanism of clay minerals to develop Cs-free mineralization for volume reduction and reuse of the treated soil in Fukushima. Weathered biotite (WB) is adopted as a model soil to sorb non-radioactive Cs. WB is heated with some alkaline salt reagents in ambient atmosphere or low-pressure conditions and the products formed after the heating treatment are analyzed using X-ray diffraction, X-ray fluorescence and X-ray absorption spectroscopy techniques. We focus on the dependences of reagents and pressure on Cs desorption ratio and structural change of WB.