摘要
目的探讨核事故应急条件下放射性碘内污染快速判断方法。方法用8192道HPGγ谱仪直接测量法,探测8种相同浓度不同体积(25ml～200ml)的131I标准溶液的效率;测量39名核医学门诊接受甲状腺功能检查而结果正常者以及39名无甲状腺疾患正常健康人员的24h尿样中131I放射性活度。结果对于不同容积的131I样品,容积越小探测效率越高;正常健康人群测量系统给出的尿样的水平为(0.52±0.26)Bq/d;甲状腺功能正常服碘者24h的摄入排出率为28.2%±14.4%。结论HPGEγ谱仪测量不小于25ml小容积尿样中131I活度的方法,适用于核事故应急条件下放射性碘内污染快速判断;利用甲状腺功能正常服碘者的摄入排泄函数值快速估算受污人员的内污染程度。
Objective To study Tacho -judgement of irradiated iodine internal contamination in nuclear accident stringency. Methods Efficiency of eight kinds of normal solution with same concentration but different volume （25ml - 200ml） was detected using direct measurement of 8192 tract HPGETspectrometer. 39 subjects of normal result after thyroid functional examination in atomic medical out - patient clinic and 39 healthy adults without thyroid affection were selected to measure intensity of radioactivity of ^131I in urina sample. Results The detection efficiency decreased with volume in ^131I sample. The average level of healthy adults was （ 0.52 ± 0.26 ） Bq/d in their urine sample. The 24 - hour discharge rate of ^131I was 28.2% ± 14.4% in subjects with euthyroidism after ^131I intake. Contusion The activity of ^131I in small volume （ ≥ 25ml） urina sample measured by HPGE,/spectrometer can be applied to judge irradiated iodine internal contamination in nu- clear accident stringency quickly. Excretion function of a subject with euthyroidism after ^131I intake can estimate fast internal contamination level in iodine contaminated crowd .
出处
《中国辐射卫生》
2009年第1期31-32,共2页
Chinese Journal of Radiological Health
基金
广东省医学科研基金项目(项目编号:A2006059)
