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. (authors)