放射性废物水泥固化样品核素浸出率测量分析

以放射性废树脂、残渣和蒸残液的水泥固化热配方试验为依据,运用HPGe-γ谱仪、低本底α、β测量仪对废物固化样品的放射性核素浸出率进行测量,分析不同源项的水泥固化体核素浸出率结果,验证相应水泥固化样品配方的准确性及可靠性。结果表明,残渣、蒸残液和废树脂的不同水泥固化样品中60Co、137Cs和总β的浸出率均在浸泡前期急剧下降;随着浸泡时间的延长,浸出率变化趋于稳定;浸出率满足GB14569.1-93的要求。

Measurement and Analysis of Nuclide Lixiviate Rate of Radwaste Cement Solidification Sample

Based on the experiment of cement solidification thermal formula for radioactive spent colophony,residua and evaporation raffinate,the nuclide lixiviate rate of radwaste cement solidification samples are measured by HPGe-γ instrument,low background α and β measurement apparatus,and the nuclide lixiviate rate of radwaste cement solidification samples of different source terms are analyzed.It validates the accuracy and the reliability of the formula for the related cement solidification samples.The result shows that the nuclide lixiviate rate of 60Co,137Cs and total β in various cement solidification samples of colophony,residua and evaporation raffinate decrease acutely in front phase.The nuclide lixiviate rate changes steadily along with the time goes on.The value of nuclide lixiviate rate satisfies the requirement of GB 14569.1-93.