北京地区人骨中铀含量及所致剂量估算

URANIUM CONCENTRATION IN BONE OF BEIJING RESIDENTS AND ESTIMATION OF INTERNAL DOSE

本文报道了用激光荧光分析方法对北京地区65例居民骨灰样中铀含量的测定结果及其所致内照射剂量的估算结果。结果表明,骨中铀含量与性别无关;但对年龄有明显的依赖性:婴幼儿(<5岁)骨中铀含量最高,平均值为0.120μg/g(骨灰);以后随年龄增加而减少;成人(>20岁)平均值为0.062μg/g(骨灰)。由成人骨中铀含量估算的其所致北京居民年有效剂量当量为45μSv。

This paper presents the measuring results of U concentrationin bone ash samples of 65 residents in Beijing area by laser-fluorimetricmethod and its internal dose is estimated.The results indicate that the Uconcentration is independent of sex,while it is dependent on age:thehigher concentration appears in infant (5y) body sample (the average 0.120μg/g (ash)), and the U concentration in adult (20y) samples is 0.062μg/g(ash).The annual effective dose equivalent estimated from U concentrationin adult bane is 45μSv.