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	Robotics	Other	All

2. No	Theme
   	Department	Section	Location	Contact Person	Radiation Worker/ Non-Radiation Worker	Field (for reference）
   	Summary
   J8	Experimental Research on Safety Assessment of Storage and Disposal of Radioactive Waste
   	Nuclear Safety Research Center	Waste Safety Research Group	Tokai Research and Development Center Nuclear Science Research Institute	Tetsuji Yamaguchi Tel:+81-29-282-6001 E-mail: yamaguchi.tetsuji@jaea.go.jp	Radiation Worker	Chemistry Geo and Environemtal Sciences Material Chemical Engineering
   	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 and alteration of glass, metals, clays, concretes and polyethlene focusing on primary factors such as adjacent barrier materials, groundwater composition, geology, colloids, microbes and radiolysis. The goal is to obtain scientific basis for models evaluating changes in the barrier functions and for systematical establishment of datasets.
   J10	Study on a Level 3 Probabilistic Risk Analysis of nuclear power plants
   	Nuclear Safety Research Center	Radiation Risk Analysis Research Group	Tokai Research and Development Center Nuclear Science Research Institute	Masanori Kimura Tel:+81-29-282-5459 E-mail: kimura.masanori@jaea.go.jp	Non-Radiation Worker	Physics 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.
   J12	Study on the volcanic activity evaluation in a geological radioactive waste disposal
   	Nuclear Safety Research Center	Environmental Safety Research Group	Tokai Research and Development Center Nuclear Science Research Institute	Seiji Takeda Tel:+81-29-282-6170 E-mail: takeda.seiji@jaea.go.jp	Non-Radiation Worker	Applied Chemistry Physics Geo and Environemtal Sciences Measurements and Instruments
   	In a safety assessment of geological radioactive waste disposal, it is necessary to estimate the environmental impact at the site due to occurrence of natural phenomenon such as a volcanic activity, an earthquake and fault activity. In this theme, the research on the volcanic activity evaluation characterized by magma residence time, accumulated volume and temporal distribution of magma is conducted, in order to estimate the thermal and/or geochemical effects of a disposal site by a volcanic activity.
   J36	Study of geological environment during construction, operation and closure of underground facility.
   	Tono Geoscience Center	Crystalline environment research group	Tono Geoscience Center	Teruki Iwatsuki E-mail: iwatsuki.teruki@jaea.go.jp	Non-Radiation Worker	Geo and Environemtal Sciences Chemistry Biology Chemical Engineering Measurements and Instruments Material
   	The construction, operation and closure of large underground facility changes hydraulic and hydrochemical condition around the facility. Such disturbance process and the recovery mechanism are still unclear. It is required to develop the observation and simulation methods for understanding of the phenomenon. Postdoctoral fellow studies the hydraulic and hydrogeochemical evolution (artificial disturbance and the recovery) process, impact of burial materials such as cement, clay in deep underground around Mizunami Underground Research Laboratory (MIU) during facility construction and after the closure by analyzing the rock, groundwater and burial materials, and previous data.
   F2	Development of evaluation method of dose rate distribution in primary containment vessel of the Fukushima Daiichi Nuclear Power Station
   	Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Sector of Fukushima Research and Development	Dose Evaluation and Nuclear Material Accountancy Group Fuel Debris Handling and Analysis Division	Tokai Research and Development Center (Nuclear Science Research Institute)	Keisuke Okumura Tel:+81-(0)29-282-5840 E-mail: okumura.keisuke@jaea.go.jp	Non-Radiation Worker	Physics Geo and Environemtal Sciences Measurements and Instruments
   	In order to contribute to planning of fuel debris retrieval, we develop the evaluation method of the most possible dose rate distribution in the primary containment vessel (PCV) by using information obtained from irradiation calculations of fuels and structural materials, severe accident analyses, local dose rate measurement in PCV with robots, and so on.
   F8	Research on alteration and leaching of molten fuel
   	Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Sector of Fukushima Research and Development	Fuel Debris Characterization and Conditioning Technology Development Group Fuel Debris Handling and Analysis Division	Tokai Research and Development Center (Nuclear Fuel Cycle Engineering Laboratories)	Hideki Ogino Tel:+81-29-282-1126 E-mail: ogino.hideki@jaea.go.jp	Non-Radiation Worker	Physics Material Chemical Engineering Chemistry Geo and Environemtal Sciences Radiation Computer and Information
   	The work on fuel debris removal from the damaged reactors at Fukushima Daiichi NPP requires a considerably long time. Considering long-term removal work and the subsequent processes such as storage, treatment and disposal, alteration of fuel debris should be evaluated . Although it is anticipated that alteration of fuel debris can be developed by external environments such as air, water and radiation (e.g., the conversion of debris surfaces into powder form and elution into the water), there is little knowledge about alteration. In this research, the alteration and leaching behavior of fuel debris will be evaluated and their models will also be developed based on the knowledge about the alteration of Chernobyl LFCM and the disposal technologies of spent fuel and vitrified waste, etc.
   F9	Research for 3D visualization of environmental radiation distribution
   	Sector of Fukushima Research and Development, Fukushima Environmental Safety center	Fukushima Radiation measurement Group,	Minami-soma(Environmental Radiation Monitoring Centre)	Yukihisa Sanada Tel:+81-244-25-2072 E-mail: sanada.yukihisa@jaea.go.jp	Non-Radiation Worker	Physics Geo and Environemtal Sciences Measurements and Instruments
   	In FukushimaEnvironmental radiation monitoring centre, radiation monitoring system using unmanned vehicle was developed for environmental radiation monitoring. We recruit a postdoctoral fellow who can demonstrate his/her ability for development of 3D tecqnique of visualization results of environmental radiation monitoring based on image reconstruction tecqnique using PET. So, it is desirable that applicants have knowledge of a radiation and the computer language.
   F10	Research on the chemical form of radioactive material in the environment and its dissolution within environmental water systems by use of solid analysis techniques
   	Sector of Fukushima Research and Development Fukushima Environmetal Safety Center	Fukushima Environmental Restoration Group	Fukushima(Miharu)	Kazuki Iijima Tel:+81-：247-61-2913 E-mail: iijima.kazuki@jaea.go.jp	Non-Radiation Worker	Chemistry Geo and Environemtal Sciences Material Measurements and Instruments
   	The radioactive cesium deposited on the land surface of Fukushima exists mostly in forests and small portions of it discharge each year into the ocean through river systems. The dissolved form of radioactive cesium migrates most easily within the eco-system. Although dissolved radiocesium concentrations are low, it is still detected in stemflow and riverflows, and this fact is considered to be the reason for the existence of freshwater fish and mushrooms with high radioactive cesium concentration. In order to predict the future behaviour of radioactive cesium in the eco-system, it is necessary to clarify the chemical form of radioactive cesium in the forest and the mechanism by which it dissolves. In this research program, we will try to uncover these issues by utilizing solid analysis instruments such as TEM, EPMA, FIB, XPS, etc., installed in the Fukushima Environmental Creation Center.
   F11	Development of analytical method for small amount radionuclides in environment
   	Sector of Fukushima Research and Development Fukushima Environmental Safety Center	Fukushima Safety Administration and Radiation Measurement Group	Fukushima(Miharu)	Yasuhiro UEZU Tel:+81-247-61-2911 E-mail: uezu.yasuhiro@jaea.go.jp	Non-Radiation Worker	Chemistry Geo and Environemtal Sciences Radiation
   	The transfer factor of Sr-90 and H-3(OBT) are not same of Cs-137 in environment . Therefore, our group would like to develop simple and rapid analytical methods for Sr-90 and OBT in environmental samples. The study points of Sr-90 analytical method by using Q-ICP-MS are reduction of isobar interference and increasing of sensitivity. The study points of OBT are aqueous yield from samples. http://fukushima.jaea.go.jp/initiatives/cat01/pdf1511/2-2_takeishi.pdf
   F13	Research and development of treatment method for radioactive wastes generated at the contaminated water treatment facility in Fukushima Daiichi Power Plant
   	Sector of Nuclear Science Research Advanced Science Research Center	Research Group for Interfacial Reaction Field Chemistry	Tokai Research and Development Center Nuclear Science Research Institute	Kazuya Tanaka Tel:+81-29-284-3518 E-mail: tanaka.kazuya@jaea.go.jp	Radiation Worker	Geo and Environemtal Sciences Chemistry 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 conversion to stable inorganic form and subsequent solidification.
   F14	Elucidation of migration behavior of radioactive cesium in forest and technological development for preventing dispersion of contaminates
   	Sector of Nuclear Science Research Advanced Science Research Center	Research Group for Interfacial Reaction Field Chemistry	Tokai Research and Development Center Nuclear Science Research Institute	Fuminori Sakamoto Tel:+81-29-284-3517 E-mail: sakamoto.fuminori@jaea.go.jp	Radiation Worker	Geo and Environemtal Sciences Biology Chemistry Applied Chemistry
   	Fungi including mushrooms have a high ability to absorb radioactive cesium from contaminated soil and woods. This ability is supposed to give significant impact on migration behavior of radioactive cesium in forest although the mechanism has yet to be elucidated. The Japanese government recently decided to decontaminate Satoyama, undeveloped woodland near the populated areas, in near future. To achieve this, prevention of radioactive cesium dispersion from the depths of the forest to Satoyama areas is necessary The purposes of this study is to elucidate the migration behavior of radioactive cesium in forest through investigating biological transformation of radioactive cesium by fungi and cesium immobilization by minerals. This study also aims to develop methods to preventing dispersion of radioactive cesium in forest.
   F16	Clarification of Cs desorption mechanism on Cs free mineralization of clay minerals
   	Materials Sciences Research Center	Analytical Sciences Development Research Group	Tokai Research and Development Center (Nuclear Science Research Institute)	Iwao Shimoyama Tel:+81-29-284-3929 E-mail: shimoyama.iwao@jaea.go.jp	Radiation Worker	Chemistry Physics Geo and Environemtal Sciences Material
   	We study Cs desorption mechanism from clay minerals to develop Cs-free meneralization for volume reduction and reuse of radioactive contaminated soil in Fukushima. Weathered biotite (WB) in Fukushima is adopted as a model soil and sorbed with non-radioactive Cs. WB is heated with some alkaline salt reagents in ambient atomosphere condition or low-pressure conditions and products formed after the heating treatment are analyzed using X-ray diffraction and X-ray flulrescence analysis. Especially, we focus on the dependences of reagents and pressure on Cs desorption ratio and structural change of WB in this study.