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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
    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.
    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)
    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.
    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.
    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"
    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.
    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
    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.