基于RELAP5-3D钠物性模型改造及验证

Improvement and Validation of the Sodium Property Model for RELAP5-3D

为使RELAP5-3D程序计算结果更准确,误差更小,在保证程序使用方法不变的前提下,采用新的钠物性模型对程序进行改造,并选用EBR-Ⅱ反应堆SHRT-45R基准题对改造后程序进行验证,比较两次的计算结果与试验值误差大小。结果显示:改造后程序计算结果变化趋势与试验结果相符,与改造前计算结果相比误差明显减小,初步证明了改造后程序计算结果比改造前更可靠。

This study applies a new sodium property model to improve the RELAP5-3D program,and uses the SHRT-45R benchmark problems of the EBR-II reactor to verify the improved program,without changing the usage of the program,so as to make the calculation results of the RELAP5-3D program more accurate and its er-rors smaller.The study compares the results of two calculations and the error magnitude of experimental values.The results show that the change trend of the calculation results of the program after improvement is consistent with experimental results,and that the error is significantly reduced compared to the calculation results before im-provement,which preliminarily proves that the calculation results of the program after improvement are more reli-able than those before improvement.