摘要
长寿期压水堆采用单一可燃毒物组件的设计不是最优选择.为满足长寿期压水堆中可燃毒物对反应性控制的综合需求,本文针对具有较好中子学性能的新型可燃毒物231Pa2O3、PACS-J、PACS-L、167Er2O3和157Gd2O3进行组合研究.结果表明,采用"快燃耗"与"慢燃耗"可燃毒物进行组合的组件可以达到更优的结果.其中对于"低富集度"下的燃料组件,可以选用231Pa2O3与PACS-J、PACS-L与167Er2O3的组合方案;对于"高富集度"下的燃料组件,可以选用231Pa2O3与PACS-J、157Gd2O3和167Er2O3的组合方案.因此,本文通过对"快燃耗"与"慢燃耗"可燃毒物组合设计,可实现对长寿期压水堆初始剩余反应性控制、反应性平缓释放及增加燃耗深度的要求.
Abstract
Long-life pressurized water reactors using a single bumable poison assembly design is not the optimal choice.In order to meet the comprehensive requirements of bumable poisons for reactivity control in long-life pressurized water reactors,this paper conducts a combined study on new bumable poisons with good neutronics characteristics:231Pa2O3,PACS-J,PACS-L,167Er2O3,and 157Gd2O3.The results show that the combination of"fast burnup"and"slow burnup"burnable poisons can achieve better results.For fuel assemblies with"low enrichment",the combination of 231Pa2O3 with PACS-J,PACS-L with 167Er2O3 can be selected;for fuel assemblies with"high enrichment",the combination of 231Pa2O3 with PACS-J,157Gd2O3 with 167Er2O3 can be selected.Therefore,this paper realizes the initial excess reactivity control,smooth release of reactivity,and increased burnup level of long-life pressurized water reactors through the combined design of"fast burnup"and"slow burnup"burnable poisons.
维普
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