稠密栅堆芯底部再淹没计算模块开发  

Study on Prediction Models Development for Calculation of Reflooding Phase of Tight Lattice

作　　者：吴丹[1,2] 余红星[2] 于俊崇[1,2] 

机构地区：[1]清华大学工程物理系,北京100084 [2]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610041

出　　处：《核动力工程》2013年第S1期27-31,共5页Nuclear Power Engineering

基　　金：国家自然科学基金项目资助(11275178)

摘　　要：再淹没是大破口失水事故下最重要也是最复杂的两相流动换热过程。与普通压水堆堆芯相比,稠密栅堆芯再淹没过程具有包壳峰值温度更高,骤冷更加缓慢等特点。已有的最佳估算程序中的再淹没模块不能直接应用于稠密栅堆芯再淹没过程的模拟。本研究在RELAP5程序再淹没模块的基础上开发适用于稠密栅堆芯再淹没计算的工具,对新的再淹没模块进行验证,并和以往其他模型的开发方案进行比较。结果表明,本文采用的模型开发方案具有一定的合理性,但弥散流区域以及发泡区域的相间阻力及相间换热模型有待进一步研究。Reflooding is the most important and complex process in a LOCA transient.Compared with ordinary PWRs,the reflooding phase of tight lattice has the characteristics of higher peak cladding temperatures and slower quench front rates.The existing best estimate codes could not be used for the reflooding calculations of tight lattice.Based on RELAP5,we developed a modified reflooding model,and did validations using experimental results and other researchers’ results.It is proved that the modified code could be used to model the reflooding phase of tight lattice.Further investigations are needed on the development of interfacial drag and interfacial heat transfer models of the dispersed flow region and the region just downstream of the quench front.

关 键 词：稠密栅 再淹没 模型 

分 类 号：TL351.1[核科学技术—核技术及应用]