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論文

Estimation of the release time of radio-tellurium during the Fukushima Daiichi Nuclear Power Plant accident and its relationship to individual plant events

高橋 千太郎*; 川島 茂人*; 日高 昭秀; 田中 草太*; 高橋 知之*

Nuclear Technology, 205(5), p.646 - 654, 2019/05

 被引用回数:2 パーセンタイル:42.44(Nuclear Science & Technology)

A simulation model was developed to estimate an areal (surface) deposition pattern of $$^{rm 129m}$$Te after the Fukushima Daiichi Nuclear Power Plant accident, and by using this model, timing and intensity of the release of $$^{rm 129m}$$Te were reversely estimated from the environmental monitoring data. The validation using data for $$^{137}$$Cs showed that the model simulated atmospheric dispersion and estimated surface deposition with relatively high accuracy. The estimated surface deposition pattern of $$^{rm 129m}$$Te was consistent with the actually measured one. The estimated time and activity of $$^{rm 129m}$$Te emission seemed to indicate that the $$^{rm 129m}$$Te was emitted mainly from Unit 3.

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