Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
長家 康展; 植木 太郎; 外池 幸太郎
Proceedings of 11th International Conference on Nuclear Criticality Safety (ICNC 2019) (Internet), 9 Pages, 2019/09
燃料デブリ体系に対する臨界安全解析のために新規モンテカルロ計算ソルバーSolomonを開発した。Solomonは、通常の臨界安全解析だけでなく、燃料デブリを含む損傷した原子炉の炉心の臨界安全解析もできるように設計されている。本論文では、Solomon開発の現状について述べ、乱雑化ワイエルシュトラス関数モデル, ボクセル形状を重ね合わせた乱雑化ワイエルシュトラス関数モデルの応用について紹介する。
Tuya, D.; 長家 康展
no journal, ,
Adjoint-weighted kinetics parameters have been calculated using the multigroup version of a Monte Carlo solver Solomon. Three iterated fission probability (IFP) algorithms/methods have been implemented and compared for multigroup infinite geometry systems.
Tuya, D.; 長家 康展
no journal, ,
A new continuous energy Monte Carlo solver Solomon (Solver of Monte Carlo) is under development at Japan Atomic Energy Agency (JAEA). Solomon features a new model for handling a continuous and random spatial distribution of materials based on the randomized Weierstrass function. This new model is suitable for analyzing criticality characteristics of fuel debris generated in severe nuclear accidents such as Fukushima Daiichi Nuclear Power Station (NPS) accident. Currently there are various development activities on going for Solomon. This work focuses on an implementation of the sensitivity analysis capability because the composition and spatial distribution of fuel debris are uncertain. The implementation is based on an iterated fission probability method, which calculates adjoint-weighted tallies such as kinetic parameters and k-eigenvalue sensitivity coefficients to nuclear data. Currently, the kinetic parameters can be calculated by one of three methods: Non-Overlapping Block (NOB), Multi-Overlapping Blocks (MOB), and Superhistory (SH) methods, while the k-eigenvalue sensitivity coefficients can be calculated via the NOB method. The implemented adjoint-weighted capability was then applied to simple fissile systems to verify the capability. The preliminary verification calculation results showed good agreement with analytic results.