核应急尿样中关键核素的快速分析及内照射剂量估算

目的 估算一名中国访问学者由于切尔诺贝利事故引起的内照射剂量。方法 使用Ge(Li)γ谱仪测定尿样中¹³⁴Cs和¹³⁷Cs的含量,根据ICRP报告,估算它们的内照射剂量,参考UNSCEAR2000报告,进一步作了¹³¹I的剂量回顾。结果 来自¹³⁴Cs、¹³⁷Cs和¹³¹I的有效剂量当量分别是66μSv、88μSv和1 728μSv。结论 ¹³¹I的内照射剂量是¹³⁴Cs和¹³⁷Cs的11倍,因此早期¹³¹I内照射剂量的估算对于核事故辐射损伤的评价具有重要的意义。

Rapid Analysis of Key Radionuclides in Urine and Estimation of Internal Dose for Nuclear Accident Emergency

Objective To estimate the internal doses of a Chinese visiting scholar in the Chernobyl accident.Methods The contents of ¹³⁴Cs and ¹³⁷Cs in urine were measured using a Ge (Li)γ-spectrometer.Their internal doses were estimated according to ICRP reports.Dose review of ¹³¹I was performed referring to UNSCEAR 2000 report.Results The effective dose equivalent from ¹³⁴Cs、¹³⁷Cs and ¹³¹I were 66 μSv、88 μSv and 1728 μSv respectively.Their summation was 1.9 mSv.Conclusion The internal dose from ¹³¹I was 10 times higher than that from ¹³⁴Cs and ¹³⁷Cs.So, the earlier estimation of internal doses for ¹³¹I is significant in evaluation on radiation injuries of a nuclear reactor accident.