3D Real-Time Simulation of Reactor Core based on Discontinuity Factor Ratio

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Duan, Xinhui^1^2 ; Wang, Bingshu^1 ; Jiang, Ping^3

Department of Automation, North China Electric Power University, Baoding, China^1

Baoding Sinosimu Technology Company Ltd., Baoding, China^2

College of Electronic Information Engineering, Hebei University, Baoding, China^3

关键词: Coarse-mesh finite differences;    Diffusion equations;    Discontinuity factor;    Distribution calculations;    Finite-difference solution;    Full scope simulators;    Generalized equivalence theory;    Real time simulations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/3/032045/pdf
DOI  :  10.1088/1755-1315/252/3/032045

来源: IOP

【 摘 要 】

During the development of full scope simulator (FSS) in nuclear power plant, it is difficult to satisfy with high precision and efficiency of the 3D distribution calculation of reactor power. The accuracy of conventional coarse mesh finite difference method (CMFD) cannot meet the requirement if the nodal size is large. According to the generalized equivalence theory (GET), the finite difference solution of diffusion equation based on discontinuity factor correction was deduced, the calculation method of the discontinuity factor and boundary albedo are presented through the process of assembly homogenization. Through the calculation of typical LMW benchmark problem, the simulation results showed that using CMFD with discontinuity factor ratio (CMFD-DFR) to solve the time-dependent neutron kinetic equation, can not only improve the simulation precision, and can keep the calculation speed, and can meet the requirement of reactor core real-time model of FSS.