MTR基准例题截面输运修正方法对比  

Cross Section Transport Correction Methods ForMaterial Test Reactor(MTR)Benchmark

作　　者：仲洋宇 周夏峰 ZHONG Yangyu;ZHOU Xiafeng(School of Energy and Power Engineering,Nuclear Engineering and Nuclear Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学、能源与动力工程学院、核工程与核技术系,武汉430074

出　　处：《现代应用物理》2023年第4期101-107,130,共8页Modern Applied Physics

基　　金：国家自然科学基金资助项目(12005073)。

摘　　要：本文针对IAEA MTR基准例题,使用蒙特卡罗程序OpenMC对IAEA MTR基准例题进行pin-by-pin建模,以OpenMC连续能量计算结果作为参考解,对比Flux-limited, Out-scatter及近年来提出的累积徙动方法(cumulative migration method, CMM)等输运修正方法的计算精度和效果,分析不同修正方法的有效增殖系数、中子注量率和功率与参考解的相对偏差。结果表明:与其他3种方法相比,CMM对截面修正方法具有较高的计算精度,与OpenMC连续能量模式的计算结果相对偏差为1.733%,pin级别功率相对偏差的RMS为3.91%。A Monte Carlo code OpenMC is used to pin-by-pin model the IAEA MTR benchmark.The computational accuracy and effectiveness of flux limited,out-scatter,cumulative migration method(CMM),and other transport correction methods are compared by using the OpenMC continuous energy results as reference solutions.The relative deviations are provied among the effective multiplication coefficient,neutron flux rate,and power of different correction methods and the reference solution.The results indicate that the CMM method for section correction has higher computational accuracy compared to the other three methods.The relative deviation between the calculation results of k eff and OpenMC continuous energy mode is 1.733%,and the RMS of the relative deviation of pin level power is 3.91%.

关 键 词：输运修正 MTR板状堆 pin-by-pin OpenMC 

分 类 号：TL329[核科学技术—核技术及应用] O571[理学—粒子物理与原子核物理]