卸料通道阀门泄漏对铀浓缩分离功率的影响研究  

Influence of valve leakage in unloading system on separative power of uranium enrichment

作　　者：杨震 连茜雯 沈钢 张树丛 YANG Zhen;LIAN Qianwen;SHEN Gang;ZHANG Shucong(North-Western China Regional Office of Nuclear and Radiation Safty Inspection,The Ministry of Ecology and Environment(National Nuclear Safety Administration),Lanzhou 730020,China)

机构地区：[1]生态环境部西北核与辐射安全监督站,兰州730020

出　　处：《核技术》2021年第8期59-66,共8页Nuclear Techniques

摘　　要：在铀浓缩过程中,分离功率是其关键评价指标,但阀门的泄漏将会对其造成影响。通过对铀浓缩离心级联卸料系统的正常工况和异常工况的分析,比较分离功率的变化,并提出对应的措施和建议,能够为铀浓缩行业及核与辐射安全监管部门提供参考。本研究采用级联模拟计算方法,通过计算机编程迭代开展分析。研究结果表明:铀浓缩离心级联卸料系统阀门通道发生泄漏时,很难通过工艺运行参数来判断。该过程对铀浓缩分离功率的影响随着阀门通道泄漏位置的不同而发生变化,对铀浓缩的经济性和安全性影响较大。当漏率存在时,0.1%的物料损失会导致3.8%的分离功率损失。因而及时准确判断卸料系统阀门通道的泄漏点是有必要的。[Background]In the process of uranium enrichment,the separation power is the key evaluation index,but the leakage of the valve will affect it.[Purpose]This study aims to analyze the normal and abnormal conditions of uranium enrichment centrifugal cascade unloading system,and put forward the corresponding measures and suggestions of valve leakage for uranium enrichment industry and nuclear and radiation safety supervision department.[Methods]The cascade simulation method was used to analyze the influence of valve leakage by computer programming iteration.Emphasis was placed on the separation power change of centrifugal cascade unloading system for uranium enrichment.[Results]The results show that it is difficult to judge the leakage of valve channels in the centrifugal cascade unloading system of enriched uranium by the process operation parameters.The influence of the process on the separation power of uranium enrichment varies with the leakage position of the valve channel,which has a great impact on the economy and safety of uranium enrichment.When the leakage rate is true,the separation power of uranium enrichment will change,and material loss of 0.1%will lead to a separation power loss of 3.8%.[Conclusions]Therefore,it is necessary to judge the leakage point of the valve channel of the unloading system timely and accurately.

关 键 词：卸料系统 阀门通道 级联模拟计算 

分 类 号：TL252[核科学技术—核燃料循环与材料]