Preliminary analysis of fuel cycle performance for a small modular heavy water-moderated thorium molten salt reactor

作     者：Ya-Peng Zhang Yu-Wen Ma Jian-Hui Wu Jin-Gen Chen Xiang-Zhou Cai Ya-Peng Zhang;Yu-Wen Ma;Jian-Hui Wu;Jin-Gen Chen;Xiang-Zhou Cai

作者机构：Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China CAS Innovative Academies in TMSR Energy SystemChinese Academy of SciencesShanghai 201800China University of Chinese Academy of SciencesBeijing 100049China 

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

年 卷 期：2020年第31卷第11期

页      面：23-35页

核心收录：

学科分类：082703[工学-核技术及应用] 08[工学] 0827[工学-核科学与技术] 

基　　金：supported by the Chinese TMSR Strategic Pioneer Science and Technology Project(No.XDA02010000) the National Natural Science Foundation of China(No.11905285) the National Natural Science Foundation of China(No.11790321) the Frontier Science Key Program of the Chinese Academy of Sciences(No.QYZDY-SSW-JSC016) 

主　　题：Molten salt reactor Heavy water-moderated molten salt reactor(HWMSR) Th-U fuel cycle 

摘      要：Heavy water-moderated molten salt reactors(HWMSRs)are novel molten salt reactors that adopt heavy water rather than graphite as the moderator while employing liquid *** to the high moderating ratio of the heavy water moderator and the utilization of liquid fuel,HWMSRs can achieve a high neutron *** this study,a large-scale small modular HWMSR with a thermal power of 500 MWth was proposed and *** criticality of the core was evaluated using an in-house critical search calculation code(CSCC),which was developed based on Standardized Computer Analyses for Licensing Evaluation,version *** preliminary fuel cycle performances(initial conversion ratio(CR),initialfissile fuel loading mass,and temperature coefficient)were investigated by varying the lattice pitch(P)and the molten salt volume fraction(VF).The results demonstrate that the temperature coefficient can be negative over the range of investigated Ps and VFs for both 233U-Th and LEU-Th fuels.A core with a P of 20 cm and a VF of 20%is recommended for 233U-Th and LEU-Th fuels to achieve a high performance of initial CR and fuel *** TRU-Th fuel,a core with a smaller P(~5 cm)and larger VF(~24%)is recommended to obtain a negative temperature coefficient.