^<137>Cs in Urine of Tourists Who Visited Kiev Late in April, 1986. - Estimation of the Intake of ^<137>CS and ^<239>Pu Due to the Nuclear Reactor Accident -

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概要

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• Gamma-ray spectrometry analysis was made of urine samples from 43 tourists who had visited Kiev late in April, 1986. Seven of 43 samples contained significant amounts of ^<137>Cs ranging in concentration from 0.14 to 0.40 pCi/ml along with other fission products. The initial intake of ^<137>Cs was estimated to be 50 to 230 nCi, which would result in a rise of the level of ^<137>Cs retention up to two orders of magnitude. Tourists' baggage was also submitted to gamma-ray spectrometry analysis at NIRS. The results suggested the presence of ^<239>Np in air in Kiev and the possibility of the inhalation of its daughter nuclides by tourists. The intake of ^<239>Pu was estimated to be 220 to 1400 pCi from each estimated value of the ^<239>Pu/^<239>Np radioactivity ratio in the fuel, the ^<239>Np/^<137>Cs ratio in air and the ^<137>Cs body burden.

• 日本放射線影響学会の論文

著者

• 渡部 輝久

  放射線医学総合研究所那珂湊放射生態学研究センター

• 渡部 輝久

  放射線医学総合研究所環境放射生態学研究部

• 菅原 幸喜

  放射線医学総合研究所那珂湊支所管理課

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• ^Cs in Urine of Tourists Who Visited Kiev Late in April, 1986. - Estimation of the Intake of ^CS and ^Pu Due to the Nuclear Reactor Accident -
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