基于蒙特卡罗程序JMCT模拟计算堆芯物理基准题VERA  被引量:2

Simulation of Core Physics Benchmark VERA Based on Monte Carlo Code JMCT

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作  者:刘鹏 史敦福[1,2] 李瑞 付元光[1,2] 邓力[2] LIU Peng;SHI Dunfu;LI Rui;FU Yuanguang;DENG Li(Software Center for High Performance Numerical Simulation,China Academy of Engineering Physics,Beijing 100088,China;Institute of Applied Physics and Computational Mathematics,Beijing 100088,China)

机构地区:[1]中国工程物理研究院高性能数值模拟软件中心,北京100088 [2]北京应用物理与计算数学研究所,北京100088

出  处:《原子能科学技术》2023年第6期1131-1139,共9页Atomic Energy Science and Technology

摘  要:JMCT是基于蒙特卡罗方法的中子输运程序,具有几何建模精细、截面数据准确、物理过程真实等特点,计算结果具有更高的精度。通过开发临界硼浓度搜索、输运-热工-燃耗耦合功能模块,使JMCT具备了堆芯物理计算功能。本文利用JMCT程序对CASL项目提出的堆芯物理基准题库VERA进行模拟,获得了k_(eff)、控制棒价值、反应性系数等启动物理参数以及硼降曲线等堆芯运行参数。JMCT计算结果与蒙特卡罗程序KENO-Ⅵ以及MC21进行了对比,结果符合良好,证明了JMCT具有堆芯物理计算能力,并具有较高的精度。Numerical reactor is aimed to show the physical phenomena by means of high-fidelity numerical simulations.Monte Carlo method is commonly used in numerical reactor.JMCT(joint Monte Carlo transport)is a large-scale,high-fidelity,three-dimensional neutron-photon-electron transport Monte Carlo software system which is developed by CAEP-SCNS.For core physics calculation,JMCT has developed a number of functions.JMCT can make use of the multiple-temperature continuous energy data library which named Nuda based on ENDF/B-Ⅶ,and uses on-the-fly(OTF)Doppler broadening to improve the accuracy of multi-temperature cross sections.JMCT also has the ability of critical boron searching based on neutron balance,which is more efficient than the traditional k_(eff)-based linear interpolation algorithm.Based on the above functions,JMCT can calculate the reactor core of zero power.For hot full power cases,thermal hydraulic feedback is considered by coupling with a sub-channel code JTH.Furthermore,JMCT is coupled with a burn-up module named JBURN.Therefore,JMCT has the feather of transport thermal hydraulic and burnup coupling.VERA benchmark is a core physics benchmark proposed by CASL.It takes Watts Bar reactor as the original model and provides reference solutions for some problems with KENO-Ⅵ.It totally contains 10 problems,problem 1 to problem 5 are zero power problems,problem 6 and 7 are hot full power problems,problem 8 and 9 are depletion problems and problem 10 is a refueling problem.Problem 1 to problem 9 were modeled and simulated by JMCT,except problem 8.JMCT k_(eff) results are in good agreement with the reference values:The difference of k_(eff) is generally less than 20 pcm,and the max value is less than 150 pcm.The difference of control rod value between JMCT and the measured value is less than 60 pcm,and the results of boron coefficient and temperature coefficient are very close to the reference results calculated by KENO-Ⅵ.The radial power distribution of each assembly shows good agreement with KENO-Ⅵand MC21 a

关 键 词:蒙特卡罗 VERA 多物理耦合 堆芯物理 

分 类 号:TL329[核科学技术—核技术及应用]

 

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