日本原子力学会和文論文誌
Online ISSN : 2186-2931
Print ISSN : 1347-2879
ISSN-L : 1347-2879
論文 (福島第一原子力発電所事故関連論文)
茨城県つくば市における福島第一原子力発電所の事故由来の線量率とガンマ線スペクトルの経時変化
佐波 俊哉佐々木 慎一飯島 和彦岸本 祐二齋藤 究
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ジャーナル フリー

2011 年 10 巻 3 号 p. 163-169

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  The time variations in the dose rate and γ spectrum of radio nuclides originating from the accident of Fukushima Daiichi Nuclear Power Station were measured at Tsukuba City, Ibaraki, during the period from 15th March to 9th April 2011. The radiation dose peaked three times during the period from 15th to 16th March (1.27 μSv/h at maximum). The contribution of Xe-133 to the dose rate was observed from the γ spectrum obtained from the 5 h measurement during the peaks on 15th and 16th March, indicating that radioactive plume passed through Tsukuba City at that time. After the peaks, a dose rate increase with rainfall was observed on 21th March, dominating the integral dose rate measured at Tsukuba City. The dose after the rainfall comes from I-131, Cs-134, and Cs-137 that can be observed as peaks in the spectra.

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© 2011 一般社団法人 日本原子力学会
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