5 MWt微型热管反应堆堆芯初步概念设计方案及热分析  

Conceptual Core Schemes and Thermal Analysis for 5 MWt Heat Pipe Cooled Micro Reactor

作　　者：康小亚 李华琪 陈森 李达[1] 田晓艳[1] 朱磊[1] KANG Xiaoya;LI Huaqi;CHEN Sen;LI Da;TIAN Xiaoyan;ZHU Lei(Northwest Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]西北核技术研究所,西安710024

出　　处：《现代应用物理》2022年第2期65-74,共10页Modern Applied Physics

基　　金：国家重点研发计划资助项目(2018YFB1900604)。

摘　　要：提出了3种5 MWt微型热管反应堆堆芯概念设计方案,并采用CFD计算软件对3种堆芯概念设计方案进行了热分析计算,研究了方案1中的包壳厚度、氦气气隙厚度和外包壳倒角半径对燃料元件温度分布的影响,计算给出了方案2和3在正常运行、1根热管失效、3根热管失效和7根热管失效情况下的温度及应力分布。结果表明:包壳厚度和氦气气隙对燃料元件温度有明显影响,而外包壳倒角半径对燃料元件温度影响可忽略;7根热管失效情况下,方案2燃料峰值温度及峰值应力比方案3略低,方案2优于方案3,即控制棒孔采用与燃料基底形状一致的孔型更为合适。Three conceptual core schemes of 5 MWt heat pipe cooled micro reactor core are proposed,and the thermal analysis and calculation of the three conceptual core schemes are carried out by using CFD calculation software.The effects of cladding thickness,helium gas gap thickness,and the inner corner fillet radius of the outer cladding on the temperature distribution of fuel elements are studied.The temperature and the stress distributions of the core under four conditions such as normal operation,one heat pipe failure,two heat pipes failure,and seven heat pipes failure are calculated.The results show that the cladding thickness and the helium gap have obvious effects on the fuel element temperature,while the influence of the inner corner fillet radius of the outer cladding on the fuel pellet temperature can be ignored;In case of failure of 7 heat pipes,it is more appropriate to adopt the type of the control rod hole consistent with the shape of fuel base hole.

关 键 词：微型热管反应堆 堆芯概念设计方案 热分析 

分 类 号：TL425[核科学技术—核技术及应用] O571[理学—粒子物理与原子核物理]