第4期
第34卷
2014年12月
核科学与工程
Nuclear Science and Engineering
Vol.34No.4
Dec.2014
失水事故下一回路水动力载荷分析
唐琼辉，周瑞，吴应喜，王荣忠（深圳中广核工程设计有限公司，广东深圳518000）
摘要：以M310反应堆冷却剂系统为对象，在计算假想失水事故(LOCA)时的一回路水动力载荷的基础上，着重分析了破口打开时间、破口面积、打开方式等破口假设特性对一回路管道、蒸汽发生器一次侧的水动力载荷的影响，并对主管道破口和辅助管道接管嘴破口下的水动力结果进行了对比分析。结果表明破口面积是影响失水事故下一回路管道和主设备上的水动力载荷的关键因索之一，辅助接管嘴破口下产生的水动力载荷与主管道上的破口产生的水动力载荷量级相当；蒸汽发生器（SG)出口接管嘴破口下SG一次侧的水动力载荷较人口接管嘴破口下的水动力载荷波动更明显。此外失水事故后蒸汽发生器隔板受到的压差远大于稳态运行下的压差值，因而在隔板设计时必须予以考虑。本文的研究成果对
新堆型研发中的一回路LOCA水动力载荷分析有重要的参考价值。关键词：失水事故；一回路；水动力载荷；隔板压差
中图分类号：TL364+.4
文献标志码：A
文章编号：0258-0918(2014)04-0462-07
Analysis of Hydrodynamic Force of the Primary
LoopunderLOCACondition
TANGQiong-hui,ZHOURui,WUYing-xi,WANGRong-zhong(Chins Nuclear Power Design Company, Shenzhen of Guangdong Prov, 518000, China)
Abstract: The transient hydrodynamic force of M31o reactors under loss of coolant accident (LOCA) condition is calculated in this paper, the effects of break characteristic including break opening time,break area as well as break opening type of the hydrodynamic force are analyzed, meanwhile the comparison of hydrodynamic force at the breakage of primary loop pipelines and at the nozzles connecting to these pipelines are made and analyzed. The results have shown that break area has critical effect on the LOCA hydrodynamic force of the primary loop and the connecting primary equipments, and the hydrodynamic force in case of breaks at the primary coolant pipeline and at the connecting nozzles are comparable, and hydrodynamic force at the SG primary side due to SG outlet nozzle break are more obvious than that due to SG inlet nozzle break.
收稿日期：2013-10-29；修回日期：2014-03-21
作者简介：唐琼辉（1976—），女，期北荆州人，工程师，工学博士，现主要从事流体力学分析 462