二次开发的RELAP5在倾斜条件下对PRS运行分析的适用性研究  

Applicability of secondary-developed RELAP5 code for PRS operation analysis under inclined conditions

作　　者：郝承明[1] 赵京[1] 汪涛 梁铁波[1] 汪宇[1] 徐慧天 孙燕[1] 喻巧 张皓 HAO Chengming;ZHAO Jing;WANG Tao;LIANG Tiebo;WANG Yu;XU Huitian;SUN Yan;YU Qiao;ZHANG Hao(Nuclear Power Institute of China,Chengdu 610005,China;No.92351 Unit of PLA,Sanya 527000,China)

机构地区：[1]中国核动力研究设计院,成都610005 [2]中国人民解放军92351部队,三亚527000

出　　处：《核技术》2025年第3期136-144,共9页Nuclear Techniques

摘　　要：为验证经二次开发后的RELAP5程序在倾斜条件下的适用性,基于缩小比例的反应堆二次侧非能动余热排出系统(Passive Residual Heat Removal System,PRS)实验装置,开展了倾斜角度为−24°~+24°的工况下的余热排出实验。在此基础上,使用二次开发后的RELAP5程序对实验工况进行了模拟计算,利用实验数据验证其适用性,并进行了进一步对比分析。研究结果表明:二次开发后的RELAP5程序能有效预测倾斜条件下系统运行特性的变化;倾斜条件下C型换热器内冷凝段长度将发生变化进而影响换热效果,当倾斜角度为正时,倾斜角度越大系统整体换热效果越好。本文研究结果可为海洋条件下二次侧非能动余热排出系统的设计提供一定参考。[Background]The operational characteristics of passive residual heat removal systems(PRS)under marine conditions are crucial for the thermal and hydraulic safety of offshore floating nuclear power plants.[Purpose]This study aims to verify the applicability of the re-developed RELAP5 code under inclined conditions.[Methods]Based on the small-scaled secondary side of the PRS experimental device,simulation of the experiments were carried out by using the secondary-developed RELAP5 code under the operating conditions of the inclination angle from−24°to+24°.Then,a comparative analysis of experimental data was performed to verify the applicability of this secondary-developed code.[Results]The results show that the length of the condensing section in the C-type heat exchanger is changed under inclination conditions,and the larger the tilt angle,the better the overall heat transfer effect is achieved.Besides,the re-developed RELAP5 code can effectively predict changes in the system operating characteristics under tilt conditions,and the deviation between the calculated results and the experimental values is within±4%.[Conclusions]The results of this study provides some reference for the design of the secondary side passive heat removal system under marine conditions.

关 键 词：RELAP5 倾斜条件 非能动余热排出系统 C型换热器 运行特性 

分 类 号：TL339[核科学技术—核技术及应用]