Conceptual design and neutronic analysis of a megawatt-level vehicular microreactor based on TRISO fuel particles and S-CO_(2) direct power generation  

作　　者：Fang-Yuan Zhang Gui-Feng Zhu Yang Zou Rui Yan Hong-Jie Xu 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nuclear Science and Techniques》2022年第6期18-33,共16页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(No.12005290);the Chinese TMSR Strategic Pioneer Science and Technology Project(No.XDA02010000);Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2020261)。

摘　　要：With global warming,the demand for diversified energy sources has increased significantly.Transportable microreactors are important potential supplements to the global power market and are a promising development direction.This paper describes a 5 MW integrated long-life S-CO_(2)cooled vehicular microreactor(VMR)design based on tristructural isotropic(TRISO)fuel particles that aims to provide electricity for industrial power facilities,remote mines,and remote mountainous areas that are not connected to central power grids.First,to facilitate transportation,flexible deployment,and simplified operation and maintenance requirements,the VMR core and auxiliary system were designed to be reasonably small and as simple as possible.Second,the TRISO fuel particles used in the proposed VMR offer excellent properties,such as high inherent security and nonproliferation,which are vital for reactors in remote areas.In addition,a long core lifetime was achieved using the compact core design and enhanced fuel loading capacity,which is challenging when using TRISO as fuel.Finally,to make the VMR economically competitive in terms of improved neutron performance and fuel efficiency compared to similar designs,large-size TRISO particles and tube-in-duct fuel assembly were utilized and different core configurations were schemed and simulated to obtain the design that best satisfied the proposed criteria.The lifetime and burnup in the final optimized VMR were satisfactory at 21 years and43.9 MWd/kgU,respectively,with an adequate shutdown margin and excellent safety parameters to ensure safe operation.

关 键 词：Vehicular microreactor Tristructural isotropic particle Tube-in-duct assembly Compact core LIFETIME BURNUP 

分 类 号：TM623[电气工程—电力系统及自动化]