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加速器駆動核変換システム用三次元炉心解析コードADS3Dの整備

Development of three-dimensional reactor analysis code system for accelerator-driven system, ADS3D

菅原 隆徳 ; 平井 康志*; 西原 健司; 岩元 大樹; Sambuu, O.*; 牛尾 直史*

Sugawara, Takanori; Hirai, Yasushi*; Nishihara, Kenji; Iwamoto, Hiroki; Sambuu, O.*; Ushio, Tadashi*

未臨界度調整機構を導入した加速器駆動核変換システム(ADS)検討に資するため、汎用炉心解析システムMARBLEの機能を利用して、三次元炉心解析コードADS3Dを整備した。従来のADS核解析では二次元RZ計算モデルを主に扱ってきたが、この整備により、三次元の非均質な計算体系を対象として、陽子・中性子の輸送から燃焼計算、燃料交換までを扱うことが可能となった。これにより、制御棒や可燃性毒物などの未臨界度制御機構を取り入れた三次元の非均質な計算体系を計算対象とすることが可能となり、より幅広いADS炉心概念の検討が可能となる。

To investigate an Accelerator-Driven System (ADS) with sub-criticality control mechanism such as control rods or burnable poison, the ADS3D code has been developed on MARBLE which is a next generation reactor analysis code system developed by JAEA. In the past neutronics calculation for the ADS, JAEA employed RZ calculation models to realize efficient investigations. However, it was very difficult to model sub-criticality control mechanisms in RZ calculation models. The ADS3D code system is available to calculate the transportation of protons and neutrons, the burn-up calculation and the fuel exchange in three-dimensional calculation models. It means this code system can treat ADS concepts with sub-criticality control mechanism and makes it possible to investigate a new concept of ADS.

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