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※ 半角英数字
 年 ~ 
 年

多様な炉心に適用する詳細核特性解析システムの整備

Development of advanced nuclear core analysis system applicable to various reactor types

金子 邦男*

not registered

本年度は、現在考えられている様々な概念の高速炉炉心に広く適用できる詳細核特性解析システムを開発することを目的として、その基礎となる詳細群ライブラリーの検討とその仕様決定を実施した。即ち、世界で最も進歩している欧州の炉物理解析システムERANOS(European reactor Analysis optimuzed System)と「次世代炉定数の整備」研究で整備された炉定数作成システムの改修作業を実施した。その後、改修炉定数作成システムの機能検証として、 450群のプロトタイプ炉定数ライブラリーを作成した。そして、作成プロトタイプ炉定数ライブラリーを使用して小型高速炉の解析等のベンチマークテストを実施し、プロトタイプ炉定数ライブラリーが十分な核特性計算精度を持つ事を確認した。更には、詳細 900群炉定数ライブラリー作成で必要となる計算機メモリー、ライブラリーのディスク容量、計算時間等のコンピュータ資源を推定した。また、詳細解析システムで使用されるセル計算コードの開発課題の摘出を行った。

This fiscal year, aiming at development of an advanced detailed analysis system applicable to nuclear core performance analysis of various fast reactors currently considered, the concept of cross section library set was examined and the specification of library set was determined. That is to say, referring the world most advanced reactor physics analysis system ERANOS (European Reactor Analysis optimized System) and the result of preceding research "preparation of next generation cross section library", 900 energy groups structure, concrete cross section data to be included and the format of cross section library were defined. And we performed elaborate work revising the group cross section production system which was prepared in the preceding research. After that the revision work was completed, to confirm the capability of revised cross section production system, we produced a prototype 450 groups cross section library. And we carried out a series of bench mark tests including analysis of small fast reactors utilizing this prototype cross section library and confirmed that the prototype cross section library has sufficient accuracy for predicting core perfomance. Furthermore, we estimated the computer resource infomation such as memory size, hard disk capacity and calculation time, etc. necessary for producing 900 groups detailed cross section library. In addition, we identified problems to be solved for developing a cell calculation code installed in our detailed analysis system.

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