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^(231)Pa_(2)O_(3)、PACS-J、PACS-L、^(167)Er_(2)O_(3)和^(157)Gd_(2)O_(3)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^(231)Pa_(2)O_(3)与PACS-J、PACS-L与^(167)Er_(2)O_(3)的组合方案;对于“高富集度”下的燃料组件,可以选用^(231)Pa_(2)O_(3)与PACS-J、^(157)Gd_(2)O_(3)和^(167)Er_(2)O_(3)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。
Long-life pressurized water reactors using a single burnable poison assembly design is not the optimal choice.In order to meet the comprehensive requirements of burnable poisons for reactivity control in long-life pressurized water reactors,this paper conducts a combined study on new burnable poisons with good neutronics characteristics:^(231)Pa_(2)O_(3),PACS-J,PACS-L,^(167)Er_(2)O_(3),and ^(157)Gd_(2)O_(3).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 ^(231)Pa_(2)O_(3) with PACS-J,PACS-L with ^(167)Er_(2)O_(3) can be selected;for fuel assemblies with"high enrichment",the combination of ^(231)Pa_(2)O_(3) with PACS-J,^(157)Gd_(2)O_(3) with ^(167)Er_(2)O_(3) 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.
作者
童吉
曲泠怡
谢金森
徐士坤
于涛
Tong Ji;Qu Lingyi;Xie Jinsen;Xu Shikun;Yu Tao(School of Nuclear Science and Technology,University of South China,Hengyang,Hunan,421001,China;Hunan Engineering&Technology Research Center for Virtual Nuclear Reactor,University of South China,Hengyang,Hunan,421001,China;Cyclotron and Radioisotope Center,Tohoku University,Sendai,Miyagi,980-8578,Japan)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2024年第2期35-41,共7页
Nuclear Power Engineering
基金
湖南省科技创新技术项目(2020RC4053)。
关键词
新型可燃毒物
可燃毒物组合
快燃耗
慢燃耗
New burnable poison
Combination of burnable poisons
Fast burnup
Slow burnup
