摘要
一回路承压管道蠕变是压水堆核电厂严重事故重要现象之一。针对小型压水堆,本文基于SCDAP/RELAP5程序开发了严重事故分析模型,利用实验拟合方法得到了一回路主管道(SA321)、自然循环式蒸汽发生器传热管(00Cr25Ni35Al Ti)两种材料蠕变预测分析模型,改进了SCDAP/RELAP5程序蠕变预测分析功能模块,并通过假想事故序列验证了SA321、00Cr25Ni35Al Ti蠕变预测分析模型的合理性。为后续开展小型压水堆严重事故下一回路承压管道蠕变规律研究提供基础参考。
Backgroud： The reactor coolant system （RCS） pipelines creep is an important phenomenon during severe accident analysis of pressurized water reactor （PWR） plants. Purpose： This study aims to develop a severe accident analysis model focus on the RCS pipeline creep analysis for small PWR plant. Method： The severe accident analysis model is developed by using the SCDAP/RELAP5 code, the creep prediction formulas of RCS main coolant pipeline （SA321） and natural circulation steam generator tubes （00Cr25Ni35A1Ti） materials are fitted by the experiment data, and the corresponding functions are added to the creep prediction subroutines of the SCDAP/RELAP5 code, which are finally verified by a simulation of supposed severe accident by SCDAP/RELAP5 code. Results： The upgraded SCDAP/RELAP5 code is finally available for the RCS pipelines creep analysis of the small PWR under severe accident condition. Conclusion： This provides a basic reference for the next quantify creep character analysis of the small PWR during the severe accident processes.
出处
《核技术》
CAS
CSCD
北大核心
2017年第5期69-74,共6页
Nuclear Techniques
