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
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
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
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
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
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.
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
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
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
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
