用RT_(T_0)取代RT_(NDT)分析国产某核压力容器压力-温度限值曲线的效益  

Benefit for the analysis of P-T limit curve of a home-made RPV using RT_(T_0) instead of RT_(NDT)

作　　者：曹昱澎[1,2] 贺寅彪[2] 惠虎[1] 李辉[2] 轩福贞[1] 

机构地区：[1]华东理工大学承压系统与安全教育部重点实验室,上海200237 [2]上海核工程研究设计院工程设备所,上海200233

出　　处：《核技术》2014年第7期72-78,共7页Nuclear Techniques

基　　金：上海上海市博士后科研资助计划(No.12R21420600);国家高技术研究发展计划(863计划)(No.2012AA040105);大型先进压水堆核电站重大专项(No.2010ZX06002)资助

摘　　要：ASME规范和美国联邦法规规定了核反应堆压力容器(Reactor pressure vessel,RPV)在正常启、停堆过程中及水压试验时的压力和温度限值,2013年版ASME规范直接纳入了Code Case N-629,即同时接受了RTT0和RTNDT两种参考温度表征的材料断裂韧性KIc下包络线。本文对比分析采用KIR-RTNDT、KIc-RTNDT和KIc-RTT0三种断裂韧性取值方法所确定的压力-温度限值曲线(P-T曲线),以国产某台RPV为研究对象,计算了在40年设计寿期末和延寿期的P-T曲线。结果表明三者差别很大,基于KIc-RTT0下包络线拓宽了P-T运行窗口,甚至无需担心该容器在启停堆过程中会发生脆断,KIc-RTNDT曲线的计算结果偏保守,而由KIR-RTNDT给出的结果过于保守。研究结果为该电站的运行和延寿的可能性提供了支持。Background： The leak test temperature and startup and shutdown pressure-temperatue （P-T） limits for reactor pressure vessel are specified in the ASME code and in the U.S. Part 50 to Title 10 of the Code of Federal Regulations. The ASME Code Case N-629 has been integrated into the 2013 ASME code. The Kic curves indexed by RTNDT and RTTo are both accepted by the ASME code. Purpose： The application of Klc-RTro curve to the determination of the P-T curve needs to be compared against the results using KIC-RTNDT and KIR-RTNDT curves. Methods： The P-T limit curves at the design life of 40 years and in the extended period are made for a home-made Reactor pressure vessel （RPV） which is taken as an example. Results： It is indicated that there exists great difference among results using the three methods. The P-T operating window based on KIc-RTTo is widened. The brittle facture can not occur during the normal start-up and cool-down transients. The P-T limit curves from KIc-RTNnT curve are relatively conservative while the results based on KIR-RTNDT curve are too conservative. Conclusion： The analysis in this paper provides the technical support to the operation and the potentional of life extension for this RPV.

关 键 词：反应堆压力容器 压力-温度限值曲线 主曲线法 ASTM E1921 

分 类 号：TL351[核科学技术—核技术及应用]