基于CORCA的带固定中子源堆芯求解与共轭计算的软件实现

CORCA-based Software Implementation of Core Solution and Conjugate Calculation with Fixed Neutron Source

深度次临界状态下,传统源倍增法在核反应堆反应性测量上具有精度低的特点,为提高测量精度,本文对CORCA软件进行扩充,开发了具备固定源问题求解和带不连续因子中子价值求解功能的CORCAFIX软件,并采用对照程序和实堆数据对CORCA-FIX软件进行了计算验证。验证结果证实,CORCA-FIX在求解带固定源堆芯的深度次临界状态时有着较高的精度,输出的结果应用于实堆数据后获得了更好的次临界度测量结果,且满足工程应用中反应性测量的偏差准则。

In the deep subcritical state,the traditional source multiplication method has the characteristic of low accuracy in the measurement of nuclear reactor reactivity.In order to improve the measurement accuracy,this paper expands CORCA software,develops CORCA-FIX software with fixed source problem solving function and neutron value solving function with discontinuous factor,and uses the comparison program and real reactor data to calculate and verify CORCA-FIX software.The verification results confirm that CORCA-FIX has high accuracy in solving the deep subcritical state of the core with fixed source.After the output results are applied to the real reactor data,better subcritical degree measurement results are obtained,and the deviation criteria of reactivity measurement in engineering applications are met.