LOCA下氦氙气冷反应堆系统安全特性分析  

Safety Characteristics Analysis of Helium-Xenon Cooled Reactor System under LOCA

作　　者：廖浩仰 明杨 赵富龙 卢瑞博 魏瑞轩 高璞珍[1,2] 谭思超 田瑞峰[1,2] Liao Haoyang;Ming Yang;Zhao Fulong;Lu Ruibo;Wei Ruixuan;Gao Puzhen;Tan Sichao;Tian Ruifeng(College of Nuclear Science and Technology,Harbin Engineering University,Harbin,150001,China;Heilongjiang Key Laboratory of Nuclear Power Plant Performance and Equipment,Harbin Engineering University,Harbin,150001,China;Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]哈尔滨工程大学核科学与技术学院,哈尔滨150001 [2]哈尔滨工程大学黑龙江省核动力装置性能与设备重点实验室,哈尔滨150001 [3]中国核动力研究设计院,成都610213

出　　处：《核动力工程》2024年第6期197-205,共9页Nuclear Power Engineering

基　　金：热能动力全国重点实验室基金(JYJC24120-50W001);中央高校基本科研业务经费(3072024JJ1501)。

摘　　要：为规避反应堆系统破口冷却剂丧失事故(LOCA)带来的高风险和高危害性,本文通过已开发的氦氙气冷反应堆系统LOCA分析程序,模拟了多种LOCA瞬态工况,分析了系统瞬态特性、容积充入影响特性、负载跟随失效影响特性、破口位置影响特性和破口尺寸影响特性。结果表明:在发生LOCA后,系统压力与流量将迅速下降;容积充入对LOCA具有缓解作用,使得流量下降速率和反应堆出口温度上升速率分别降低77.15%和90.27%;负载不变和高压处破口均对LOCA具有负面影响,使得流量下降速率分别提高13.85%和79.83%,反应堆出口温度上升速率分别提高15.84%和96.06%;系统压力和流量下降速率随着破口尺寸增加而增加,尤其破口尺寸从15 mm到30 mm,流量下降速率与反应堆出口温度上升速率的增加幅度显著,分别为258.84%和595.91%。In order to avoid the high risk and harm caused by the loss of coolant accident(LOCA)in the reactor system,the developed LOCA analysis code for helium-xenon cooled reactor system was used to simulate a variety of LOCA transient conditions,and the system transient characteristics,volume filling influence characteristics,load following failure influence characteristics,break location influence characteristics and break size influence characteristics were analyzed.The results show that the system pressure and mass flow rate decrease rapidly after the LOCA.Volume filling can alleviate LOCA,reducing the rate of mass flow rate decline and the rate of reactor outlet temperature rise by 77.15%and 90.27%,respectively.Both the constant load and the break at high pressure have a negative impact on LOCA,resulting in an increase in the rate of mass flow rate decline by 13.85%and 79.83%respectively,and an increase in the rate of reactor outlet temperature rise by 15.84%and 96.06%respectively.The decrease rates of system pressure and mass flow rate rise with the increase of the break size.Especially between 15 mm and 30 mm of the break size,the flow rate decreases and the reactor outlet temperature increases significantly by 258.84%and 595.91%,respectively.

关 键 词：直接布雷顿循环 氦氙混合气体 冷却剂丧失事故(LOCA) 系统仿真程序 

分 类 号：TL3[核科学技术—核技术及应用] O351.2[理学—流体力学] TK121[理学—力学]