基于RELAP5的铅铋物性及传热模型改造研究  

Modification of Physical Properties and Heat Transfer Model of Lead Bismuth Based on RELAP5

作　　者：丛源岐 姜旭辉 林萌[1] 杨燕华[1] CONG Yuan-qi;JIANG Xu-hui;LIN Meng;YANG Yan-hua(School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学核科学与工程学院,上海200240

出　　处：《计算机仿真》2025年第1期275-280,共6页Computer Simulation

基　　金：广域非平衡两流体相间热质传输关键模型研究(U21B2059)。

摘　　要：为对铅铋快堆开展热工水力特性以及安全分析,在RELAP5程序基础上进行铅铋合金的热物理性质、输运性质参数以及液态金属流动换热模型的扩展改造后,对改造后的程序进行自然循环以及强迫循环验证,并对自然循环的启停工况进行验证。自然循环验证结果表明:流体流量和流体温度与文献参考值一致,计算得到的流体流量和流体温度的最大相对误差为5.37%和2.13%;强迫循环验证结果表明:程序计算得到的流体温度和热源表面温度的稳态相对误差均在2%以内,瞬态相对误差在5%以内;自然循环启停验证结果表明:启动时的计算流量和温度相对误差在10%以内,停止时趋势合理。验证结果表明改造后的RELAP5程序适用于后续铅铋流体自然循环和强迫循环的计算分析,且适用于自然循环启停工况。In order to carry out thermal-hydraulic characteristics and safety analysis for the lead-bismuth fast reactor,the thermophysical properties,and transport property parameters of lead-bismuth alloy and liquid metal flow,and heat transfer model were extended and modified on the basis of the RELAP5 program.The modified program was verified by natural cycle and forced cycle,and the startup and shutdown conditions of the natural cycle were verified.The results of natural circulation verification show that the fluid flow and fluid temperature are consistent with the reference values.The maximum relative errors between the calculated fluid flow and fluid temperature are 5.37%and 2.13%.The verification results of forced circulation show that the steady-state relative erors of fluid temperature and heat source surface temperature calculated by the program are within 2%,and the transient relative errors are within 5%.The verification results of the natural circulation startup show that the relative error of flow and temperature calculated is within 10%,and the trend at shutdown is reasonable.The verification results show that the modified RELAP5 program is suitable for the subsequent calculation and analysis of natural circulation and forced circulation of lead-bismuth fluid,and is suitable for the start and stop conditions of natural circulation.

关 键 词：铅铋合金 程序改造 验证 传热模型 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]