居室石材放射性监测方法探讨

On the Radioactive Monitoring Method for Housing′s Decorative Stone Material

选择GB 6566- 86《建筑材料放射性卫生防护标准》及JC 51 8- 93《天然石材放射防护分类控制标准》 ,作为居室石材放射性监测依据 ,使用X γ剂量率仪对部分居室石材的放射性水平进行了现场监测 ,结果表明 :进行现场测量时 ,当X γ剂量率仪的探头质心距地面 1 0cm、测量值小于 1 2 3nGy/h± 5nGy/h时 ,可以确定该石材属于A类 ,能用于居室装饰 ;当测量值大于 1 2 3nGy/h± 5nGy/h时 ,要进一步做γ放射性比活度测量 ,以确定其放射性水平是否超标。

In accordance with GB 6566-86 and JC 518-93, some housing′s radioactivity of decorative stone material was monitored on-site. When the probe of X γ dosage rate detector was 10 cm from the ground, the detection value was less than 123nGy/h±5 nGy/h, the stone material belonged to Class A and can be used for decoration. When the detection value was more than 123nGy/h±5 nGy/h, it must undertake determination of relative γ-radioactivity.