Mid-loop工况冷凝回流冷却措施分析  

Analysis of Reflux Condensation in Mid-loop Condition

作　　者：杨亚军[1] 张琨[1] 

机构地区：[1]上海核工程研究设计院,上海200233

出　　处：《原子能科学技术》2013年第10期1778-1781,共4页Atomic Energy Science and Technology

摘　　要：核电厂在Mid-loop工况下由正常余热排出(RHR)系统移出堆芯衰变热,一旦丧失RHR系统,若不采取措施,堆芯在沸腾后可能裸露并最终损坏。本工作以300 MW核电厂为对象,采用RELAP5/Mod3.2程序对Mid-loop工况下丧失RHR系统时的冷凝回流冷却措施进行分析。结果表明,在RCS回路封闭的情况下,两台蒸汽发生器(SG)均充满水,或1台SG充满水且辅助给水系统可用时,通过冷凝回流可维持24h堆芯不裸露,即冷凝回流是可行的缓解措施之一。The normal residual heat removal （RHR） system is used to remove the decay heat generated in the reactor core when a nuclear power plant （NPP） is in Mid-loop condition .Once the RHR system is lost without taking any action ,it could eventually lead to core damage following core boiling and uncovery . The RELAP5/Mod3.2 code was used to analyze the reflux condensation when RHR system was lost in Mid-loop condition for a 300 MW NPP . The result shows that when RCS is closed ,the core may remain covered for 24 h if two SGs are filled with water ,or one SG is filled with water and one auxiliary feedwater is available . Reflux condensation can be used as one of successful mitigation measures .

关 键 词：Mid—loop 正常余热排出 冷凝回流 

分 类 号：TL33[核科学技术—核技术及应用]