尿氚的分析测量和氚人体半排期的实验研究

MEASUREMENT OF TRITIUM IN URINE AND STUDY ON HALF-TIME OF TRITIUM EXCRETION OF MEN

用蒸馏和液体闪烁计数法测量了中国工程物理研究院核物理与化学研究所老点核退役过程中直接接触氚和间接接触氚工作人员的尿样几十个。氚浓度在 10 2 Bq/L和 10 5Bq/L之间 ,最大氚浓度为 2 .7× 10 5Bq/L ,约折合剂量当量 0 .19mSv。短期观测了 2 3名人体氚半排期 ,其范围为 5 .5～ 14.8d ,平均值 9.1d ;中期观测了 5名人体氚半排期 ,其范围为 7.6～ 9.4d ,平均值为 8.5d。本工作的共 2 8名半排期不仅与理论值 10d接近 。

Tritium in urine of seueral tens of the workers in the course of the decommissioning was determinated by distillation and liquid scintillation counter,of which the concentration is between 10 2Bq/L and 10 5Bq/L and mximum concentration is 2.7×10 5Bq/L,which is equivalent to dose 0.19mSv as counted.The half time of tritium excretion of 23 workers was observated in short time,for them the value observed is between 5.4d and 14.8d and the average value is 9.1d.The half time of tritium excretion of 5 workers was observed in middle time,to gire the value between 7.6d and 9.4d and the average value is 8.5d.The half time of 28 workers in the work not only comes near to theoretical value 10d,but also fully consistent with home and abroad value observed.