氦氙气冷移动式反应堆堆芯物理计算分析  

Core Physics Calculation and Analysis for Helium-xenon Cooled Mobile Reactor

作　　者：王心泓 柯国土[1] 杨夷[1] WANG Xinhong;KE Guotu;YANG Yi(Department of Reactor Engineering Technology,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院反应堆工程技术研究所,北京102413

出　　处：《原子能科学技术》2025年第1期135-141,共7页Atomic Energy Science and Technology

摘　　要：移动式反应堆固有安全性高、经济性好、部署灵活,是未来先进反应堆技术发展的重要方向。高温气冷堆因其性能特点在移动式反应堆设计中广受青睐,基于此提出一种使用氦氙为冷却剂、低浓度TRISO包覆颗粒为燃料的移动式反应堆堆芯方案,并使用蒙特卡罗程序MCNP对其进行物理特性研究计算。计算结果表明:本文方案为超热堆,功率分布合理,控制系统价值足够;温度功率效应为负值,满足设计要求;后备反应性充足,可支持满功率运行1500 EFPD;本文方案相比其他先进移动式反应堆体积较小,但燃耗深度相对较浅。总体而言本文提出的堆芯方案合理,能够满足设计要求。Mobile reactors,with their high inherent safety,economic viability,and flexible deployment,represent an important direction for the development of advanced reactor technologies and have garnered widespread attention from nuclear powers around the world.High-temperature gas-cooled reactors,favored for their inherent safety and high conversion efficiency,are widely preferred in the design of mobile reactors.Based on this,a mobile reactor core scheme was proposed that uses heliumxenon as the coolant and low-concentration TRISO-coated particles as fuel.The core utilized beryllium oxide(BeO)as a reflector material,and the side reflector layer was uniformly arranged with 16 control drums,forming the reactor's reactivity control system.Additionally,a central reflector was positioned at the core's center,a design that drew on the experience of the Holos mobile reactor and the U-Battery mobile reactor,which could better assist the reactor in achieving criticality and extending the core life.Moreover,safety rods were be arranged within the central reflector,serving as the emergency shutdown system for the reactor.To minimize the size of the reactor,hundreds of reactor types with different dimensions were calculated,resulting in the smallest reactor size parameters with sufficient initial reactivity and a certain margin of adjustment:a total core height of 380 cm and an outer diameter of220.8 cm.After establishing a complete core physical model,the Monte Carlo program MCNP was used to study and calculate its physical properties.The calculation results indicate that the proposed scheme is a supercritical reactor.The power distribution is reasonable,with a radial maximum power non-uniformity factor of 1.384 and an axial maximum power non-uniformity factor of 1.245.The control system value is sufficient,the safety rods can independently complete the shutdown task,and the control drums can handle the reactivity adjustment task for the entire life period even in the case of drum jamming.The temperature power effect is mainly the

关 键 词：移动式反应堆 高温气冷堆 物理设计 

分 类 号：TL329[核科学技术—核技术及应用]