LBB设计中管道贯穿裂纹张开位移及泄漏率计算研究  

Research on crack-opening displacement and leak rate prediction of the through-wall crack in LBB design

作　　者：乔红威[1] 李琦[1] 刘志伟[1] 李锡华[1] 

机构地区：[1]中国核动力研究设计院二所,成都610041

出　　处：《核技术》2013年第4期94-100,共7页Nuclear Techniques

摘　　要：在核电站管道破前漏设计(LBB)过程中,需要对管道的关注部位假设一个贯穿裂纹,然后计算该裂纹在正常运行工况下的裂纹张开位移(COD)以及流体泄漏率,从而验证管道LBB设计准则的适应性。本文介绍了COD以及泄漏率计算的意义,然后探讨了各种计算方法的优缺点和发展方向,最后给出了自主开发程序的验证算例。文中讨论的问题可为LBB技术在我国核电厂中的应用提供参考。Background： During the process of Leak Before Break （LBB） design for the pipes in nuclear power plant, a through-wall crack is hypothesized in each selected location of the candidate pipe line, then the Crack-Opening Displacement （COD） and leak rate of the crack under normal operation condition is predicted, finally the applicability of the LBB design criterion is ascertained. Purpose： Discuss the disadvantages of the COD and leak rate calculation methodologies, develop a COD and leak rate calculation program. Methods： Through compare the results from the program developed by ourselves with PICEP, the program developed by ourselves is verified. Results： The results from the program developed by ourselves tally with PICEP. Conclusions： The disadvantages of each COD and leak rate methodologies are discussed; then a program was successfully developed. Both can provide some reference for the application of the LBB approach to the nuclear power stations of China.

关 键 词：LBB 裂纹张开位移 泄漏率 程序研发 

分 类 号：O346.1[理学—固体力学]