氦氙气冷小堆燃料棒辐射散热特性分析  

Analysis of Radiation Heat Dissipation Characteristicsof Helium-xenon Gas Cooled Small Reactor Fuel Rod

作　　者：王宪礴 赵富龙 谢林 田游游[1,2] 鲍辉 田瑞峰 谭思超[1,2] WANG Xianbo;ZHAO Fulong;XIE Lin;TIAN Youyou;BAO Hui;TIAN Ruifeng;TAN Sichao(School of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China;Heilongjiang Provincial Key Laboratory of Nuclear Power System&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,黑龙江哈尔滨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,黑龙江哈尔滨150001 [3]中国核动力研究设计院,四川成都610213

出　　处：《原子能科学技术》2024年第5期1060-1068,共9页Atomic Energy Science and Technology

基　　金：中国科协青年人才托举工程(2021QNRC001);核反应堆系统设计技术重点实验室基金(KFKT-05-FW-HT-20220018)。

摘　　要：反应堆堆芯热工安全特性是反应堆系统安全特性最重要的组成部分。氦氙气冷小堆中燃料棒间温差大,辐射散热不可忽略。因此针对氦氙气冷小堆堆芯,不止需要考虑对流换热和热传导两种换热形式,也需要考虑辐射散热对堆芯换热的影响。本文通过建立氦氙气冷小堆堆芯1∶1精细化模型,开展反应堆堆芯内部三维辐射散热特性分析,同时获得辐射角系数。将本文模型计算结果与蒙特卡罗方法结果进行对比验证,两者相对误差小于1%,证明该辐射角系数计算方法的准确性。开展了燃料棒径距比、燃料棒表面温度、燃料棒长度等几何参数敏感性分析,关注其对燃料棒辐射散热特性的影响,并开发出一套具有普适性的堆芯内燃料棒辐射角系数经验关系式。本文通过研究燃料棒间辐射散热特性了解反应堆内辐射散热规律,为后续反应堆堆芯热工安全特性研究提供了技术支撑。Space power nuclear systems require reactors to have characteristics such as compactness,miniaturization and efficiency.The combination of helium xenon mixture gas and the Brayton cycle is a good choice.Existing research on helium-xenon gas cooled small reactors mostly focuses on the system level,with insufficient consideration for the refinement of individual components.The core is the most critical part of the entire Brayton cycle system,and the thermal safety characteristics of the core are the most important component of the safety characteristics of the reactor system.Therefore,mastering the thermal safety characteristics of the core is particularly important.There are not only two forms of heat transfer inside the core:convective heat transfer and heat conduction,but also radiative heat dissipation.In this paper,the three-dimensional simulation method was adopted to establish a 1∶1 model of the helium-xenon gas cooled small reactor core and analyzed the radiation heat dissipation characteristics inside the core.The Monte Carlo method was used to verify the proposed method of calculating radiation angle coefficients using three-dimensional simulation.The relative error between the two calculation results is less than 1%,proving the accuracy of the three-dimensional simulation method.On this basis,a study was conducted on the radiation heat dissipation characteristics of fuel rods in the core of helium-xenon gas cooled small reactors.The sensitivity analysis on geometric parameters such as fuel rod aspect ratio,fuel rod surface temperature and fuel rod length was conducted,and paid attention to their impact on the radiation heat dissipation characteristics of fuel rods.The results show that as the aspect ratio between fuel rods increases,the radiation angle coefficient also increases.When the length of the fuel rod is less than 100 mm,the length of the fuel rod has a significant impact on the radiation angle coefficient.When the length of the fuel rod is greater than 100 mm,the radiation angle coefficient i

关 键 词：燃料棒 辐射散热 氦氙气冷小堆 热工安全 

分 类 号：TL33[核科学技术—核技术及应用]