Abstract:

Considering to reduce the filling factor of Be pebble bed from 80% to 62% in preliminary design phase, preliminary neutronics design and optimization for conceptual design of China ITER helium cooled ceramic breeder test blanket module (HCCB TBM) have been performed and the optimized HCCB TBM design has been proposed with modifying the material and arrangement of TBM inner components. This design has a better neutronics performance and satisfies the safety demand. Calculation results show that the tritium production rate of optimized HCCB TBM design is increased by 0.42mg/FPD comparing with conceptual design, but the total nuclear heating and peak power density are lower than conceptual design. These results can be used as supporting analyses for HCSB TBM preliminary design.

Key words: HCCB TBM, Neutronics design and optimization, Tritium production rate

摘要：

针对ITER中国氦冷固态增殖剂试验包层模块(HCCB TBM)的概念设计方案进行了初步中子学设计和优化。在铍球床填充率从80%降为62%的情况下，通过调整TBM内部结构的材料和布置，提出了一种中子学性能更好且满足安全要求的设计方案。计算结果表明，优化后HCCB TBM的产氚率比概念设计值提高的满功率运行一天后的产氚量为0.42mg，但总核热和最大功率密度有了一定降低。

关键词: 氦冷固态增殖剂试验包层模块, 中子学设计和优化, 产氚率