某型反应堆启动中子源设计研究  

Design of the Start-up Neutron Source for a Reactor

作　　者：陈志宏 李志勇 沈季 于悦海 张颖 CHEN Zhihong;LI Zhiyong;SHEN Ji;YU Yuehai;ZHANG Ying(China Nuclear Power Engineering Co.,Ltd.,Shenzhen of Guangdong Prov.518124,China)

机构地区：[1]中广核工程有限公司,广东深圳518124

出　　处：《核科学与工程》2024年第6期1215-1225,共11页Nuclear Science and Engineering

摘　　要：基于某型反应堆堆芯设计,依据相关法规标准,使用蒙特卡罗程序通过计算分析堆外源量程探测器处的归一化中子注量率,给出该型反应堆堆芯启动中子源(包括初级中子源和次级中子源)设计方案。同时,考虑到次级中子源使用带来的诸多问题,结合影响乏燃料组件中子源强参数的敏感性分析结果,计算了燃耗组件的中子源强并对后续循环取消次级中子源的可行性进行了评估。分析结果表明,采用高效能探测器,如提高探测器量程覆盖范围或探测器热中子灵敏度时,后续平衡循环堆芯取消次级中子源在理论上是可行的。Based on the core design of a certain type of reactor,according to relevant laws and regulations,the design schemes of the start-up neutron source(including the primary and secondary neutron sources)of this type of reactor core are given by using the Monte-Carlo code through calculation and analysis.At the same time,considering many problems caused by the use of the secondary neutron source and combining with the sensitivity analysis results of parameters which affecting neutron source intensity of the spent fuel assembly,this work calculated the neutron source intensity of spent fuel assemblies and evaluated the feasibility of canceling the secondary neutron source in the subsequent cycles.The analysis results show that it is theoretically feasible to cancel the secondary neutron source in the subsequent equilibrium cycle core when using high-efficiency detectors,such as increasing the range coverage of the detector or the thermal neutron sensitivity.

关 键 词：蒙特卡罗程序 启动中子源 初级中子源 级次中子源 中子源强 

分 类 号：TL33[核科学技术—核技术及应用]