基于瞬态基准实验的CAACS程序验证

摘要

核临界安全是核工业发展的特殊安全问题,其中临界事故的分析评价具有重要的学术意义和工程价值.CAACS程序是自主开发的圆柱形溶液系统临界事故分析程序,可以实现计算临界事故的裂变次数,裂变功率、温度随时间的变化等功能.为了验证自主开发的CAACS程序,本文利用瞬态基准实验对程序进行验证,并于其他程序作了对比.结果表明:CAACS程序的计算结果与实验测量值符合较好,与国外同类程序具有相当的技术水平和精度,可为后处理厂建设提供事故分析的技术手段,为后续的临界瞬态研究奠定基础..%Nuclear criticality safety is a special security problem during the development of nuclear industry,among which analysis and evaluation of criticality accident has important academic and practical significance.CAACS program is a criticality accident analysis program for cylindrical solution system.The program could calculate the number of fission,fission power,temperature changes with time of the criticality accident and so on.In order to verify the CAACS program,this paper uses the transient benchmark experiments to do the verification,and then compares it with other similar foreign programs.The results showed that:the calculated results of CAACS is in good agreement with the experimental measurements.CAACS is of coequal technical level and accuracy with similar foreign programs,which provides the technical means of accident analysis for the transformation and construction of subsequent commercial fuel reprocessing plants plant,and lays the foundation for subsequent critical transient studies.