COSINE堆用蒙卡分析软件cosRMC研发与应用

Development and Application of COSINE Reactor Monte Carlo Code cosRMC

为进一步提升核电软件自主化能力,研发了核电厂设计与安全分析一体化软件包COSINE。其中cosRMC为堆用三维中子-光子-电子输运蒙卡软件,已具备输运计算、燃耗计算、群常数产生、敏感性及不确定性分析、可视化建模等功能,可用于堆芯设计分析、确定论校核计算以及辐射屏蔽计算。本文从cosRMC的计算功能以及软件在先进非能动型压水堆(AP1000)与中国聚变工程实验堆(CFETR)中的典型应用对cosRMC软件的研发现状进行介绍。其中,AP1000堆芯的模拟结果显示,21种燃料组件及全堆芯模型的增殖因子绝对值最大偏差为89.9×10^(-5),功率分布计算结果绝对值最大偏差为2.1%;CFETR的模拟结果显示,氚增殖比的最大绝对值偏差为0.6%,cosRMC网格权窗功能可以有效解决模拟过程中的深穿透问题。cosRMC软件计算功能可满足压水堆、聚变堆等大型复杂模型的计算需求,软件具有较高的计算精度,同时可视化建模工具可有效提升建模效率及正确性。

The self-developed COSINE Monte Carlo code cosRMC is designed for the analysis of the reactor core and the radiation shielding.The typical functions as transport simulation,burnup calculation,group constants generation,sensitivity&uncertainty analysis and visual modeling have been sufficiently researched.A lot of V&V work was carried out,and the recent application in AP1000 PWR and China Fusion Engineering Test Reactor(CFETR)is introduced in this paper to show the capability of cosRMC.The simulation results show the maximum absolute deviation is 89.9×10^(-5 )for eigenvalue and 2.1%for power distribution of the 21 types of assemblies and core models of AP1000,while the maximum absolute deviation is 0.6%of the CFETR thorium proliferation ratio.The typical work further exhibits that cosRMC software can meet the computational needs of the large and complex models such as PWR and Fusion Reactor with high accuracy,and the visual modeling tool imbedded can effectively improve the modeling efficiency.