基于长寿期压水堆的新型可燃毒物材料组合研究  

Study on New Burnable Poison Material Combinations Based on Long-life Pressurized Water Reactor

作　　者：童吉 曲泠怡 谢金森[1,2] 徐士坤 于涛[1,2] 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)

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001 [2]南华大学湖南省数字化反应堆工程技术研究中心,湖南衡阳421001 [3]日本东北大学回旋加速器与放射性同位素研究中心,日本宫城仙台980-8578

出　　处：《核动力工程》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)。

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.

关 键 词：新型可燃毒物 可燃毒物组合 快燃耗 慢燃耗 

分 类 号：TL329[核科学技术—核技术及应用]