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核技术  2015 

基于MCNP-ORIGEN2耦合程序的小型行波堆堆芯概念设计

DOI: 10.11889/j.0253-3219.2015.hjs.38.080603, PP. 80603-80603

Keywords: 行波堆,MCNP,ORIGEN2,耦合,堆芯设计,小堆

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Abstract:

研究设计了基于中国实验快堆(ChinaExperimentalFastReactor,CEFR)的小型“行波”概念堆。采用中子输运程序MCNP和点燃耗程序ORIGEN2的耦合程序进行堆芯设计,重点研究了不同点火组件的富集度和不同布料方案对小型堆的物理参数的影响,设计堆芯寿期为30a,并给出相应的倒料方案。不同点火组件富集度对比结果表明,小堆需要选取合适的富集度,富集度太低无法维持临界,而太高会影响堆芯增殖效应;而低泄漏和棋盘式布料两种方式对比结果表明,后者的增殖组件增殖效应明显高于前者。最终确定倒料周期为8a,倒料三次,堆芯实现较长寿期,且整个寿期内反应性变化小,各组件燃耗深度相对均匀,组件平均卸料燃耗深度约为238MWD/kgHM。

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