摘要
某金属氧化物是一种具有高放射性的核工业后处理产物,其在密封储存过程中释放热量并产生氢气和氦气,导致储存容器温度升高、内部压力增大。为了确保某金属氧化物长周期储存安全性,文中深入分析其储存特性演变规律及储存工况参数,设计储存容器采用数值模拟探究储存工况对容器温度、压力的影响,进而验证储存容器结构合理性并优化储存工况。结果表明:提高冷却风速、降低冷却风温、增大堆积密度及适量的含水率有利于金属氧化物在储存过程中传热冷却,其中冷却风速对该金属氧化物温度影响最大;降低含水率、提高冷却风速、增大堆积密度及降低冷却风温有利于避免储存过程中内压过高,其中金属氧化物含水率的升高对容器压力的增加影响显著,在实际储存中需要严格控制金属氧化物中的水分含量。
A metal oxide is a highly radioactive reprocessing product of the nuclear industry,which releases heat and generates hydrogen and helium during sealed storage,leading to an increase in the temperature and internal pressure of the storage vessel.In order to ensure the safety of a certain metal oxide in long-term storage,this paper analyzes the evolution of its storage characteristics and the parameters of the storage working conditions,designs the storage vessel and uses numerical simulation to investigate the influence of the storage working conditions on the temperature and pressure of the vessel,and then verifies the reasonableness of the structure of the storage vessel and optimizes the storage working conditions.The results show that:increasing the cooling air velocity,lowering the cooling air temperature,increasing the stacking density and the appropriate amount of water content are conducive to the heat transfer and cooling of metal oxides in the storage process,among which the cooling air velocity has the greatest influence on the temperature of the metal oxides;decreasing the water content,increasing the cooling air velocity,increasing the stacking density and lowering the cooling air temperature are conducive to avoiding the high internal pressure in the storage process,among which the increase of the water content of metal oxides has a significant influence on the increase of the container pressure.The increase of water content of metal oxides has a significant effect on the increase of container pressure,and the water content of metal oxides needs to be strictly controlled in the actual storage.
作者
张朋
吴德慧
马敬
周冠辰
谢非
苑斯雯
ZHANG Peng;WU Dehui;MA Jing;ZHOU Guanchen;XIE Fei;YUAN Siwen(China Nuclear Power Engineering Limited Company,Beijing 100840)
出处
《机械设计》
CSCD
北大核心
2024年第S01期177-182,共6页
Journal of Machine Design
关键词
储存时间
堆密度
金属氧化物含水率
数值模拟
storage time
bulk density
metal oxide moisture content
numerical simulation
