钴-60源运输容器安全性分析

Safety Analysis of Container forTransporting 60Co Source

根据ＩＡＥＡ安全标准Ｎｏ．６有关规程的要求，采用工程传热学和工程力学分析方法，对未经国标ＧＢ１１８０６８９规定试验的钴６０源运输容器的安全性作了分析。经计算分析得，本容器外表面辐射水平为１．５６ｍＳｖｈ－１，小于ＩＡＥＡ有关规程规定的２ｍＳｖｈ－１限值。容器经改进后，在８００℃火焰中曝射３０分钟，其铅温度为１６６．４℃，小于ＩＡＥＡ有关规程规定的２００℃限值。本容器与国内工业用钴６０源运输容器相比，具有承受正常运输和事故运输条件的能力，其货包的安全性符合ＧＢ１１８０６８９和ＩＡＥＡ的规定要求。

Analysis method of engineering heat transfer and engineering mechanics has been used to confirm safety proterties of transporting container for 60Co source that has not been carried out tests provide for by national standard GB11806 89 according demands of IAEA safety standard No.6(brifly called IAEA“REGULATION”).Analyses and computation show that radiation level on surface from container is 1.56mSv·h-1.The value is less than 2mSv·h-1 standard value provide for by IAEA“REGULATION”.The container improved is fired at 800℃ dupeltion 30min.Temperature of Pb is 166.4℃,and littlely lower than 200℃ limited value of IAEA“REGULATION”.The container has capability of free condition and accdient condition for transportation.The safety proterties of loading accord with the demands of GB11806 89 and IAEA“REGULATION”.