Forced propagation method for Monte Carlo fission source convergence acceleration in the RMC

作     者：Ze-Guang Li Kan Wang Yu-Chuan Guo Xiao-Yu Guo Ze-Guang Li;Kan Wang;Yu-Chuan Guo;Xiao-Yu Guo

作者机构：Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 100084China Department of Engineering PhysicsTsinghua UniversityBeijing 100084China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2021年第32卷第3期

页      面：52-62页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

基　　金：supported by the National Natural Science Foundation of China(Nos.11775126,11545013,11605101) the Young Elite Scientists Sponsorship Program by CAST(No.2016QNRC001) Science Challenge Project by MIIT of China(No.TZ2018001) Tsinghua University,Initiative Scientific Research Program 

主　　题：Fission source convergence acceleration Monte Carlo method Forced propagation method RMC code 

摘      要：In loosely coupled or large-scale problems with high dominance ratios,slow fission source convergence can take extremely long time,reducing Monte Carlo(MC)criticality calculation *** various acceleration methods have been developed,some methods cannot reduce convergence times,whereas others have been limited to specific problem *** this study,a new fission source convergence acceleration(FSCA)method,the forced propagation(FP)method,has been proposed,which forces the fission source to propagate and accelerate fission source ***,some stabilization techniques have been designed to render the method more *** resulting stabilized method was then successfully implemented in the MC transport code,and its feasibility and effectiveness were tested using the modified OECD/NEA,one-dimensional slab benchmark,and the Hoogenboom full-core *** comparison results showed that the FP method was able to achieve efficient FSCA.