考虑瞬态分析的反应堆结构关键间隙优化设计

摘要

Design of reactor structure key clearances is the important part in the reactor internals structure design.This paper analyzed the influence factors on clearance value between reactor internals and pressure vessel.Then,the variations of the reactor structure key clearances under transient conditions had been investigated by using the general finite element analysis software,ANSYS.A new kind of design method of the reactor structure key clearances was offered.The investigation result has successfully been used to the reactor structure key clearances optimum design of HUALONG 1 which is the three-generation advanced nuclear power reactor.The design has reliability and rationality for that the design of reactor structure key clearance has been improved effectively.%反应堆堆内关键间隙设计是反应堆堆内构件结构设计的关键内容。分析了影响堆内构件与压力容器间间隙值的影响因素，针对三种典型间隙，基于通用有限元软件 ANSYS，研究了瞬态工况下反应堆内关键间隙变化，提出了一种新的反应堆内关键间隙优化设计方法。研究成果已成功应用于三代核电华龙一号反应堆内关键间隙的优化设计中，有效提高了反应堆内关键间隙设计的合理性和可靠性。