福岡県における福島第一原子力発電所事故初期の放射線影響評価

Translated title of the contribution: Early Radiological Impacts of Fukushima Daiichi Nuclear Power Plant Accident Fallout in Fukuoka Prefecture

楢崎 幸範, 竹村 俊彦, 天野 光, 石川 徹夫, 藤高 和信

Research output: Contribution to journalArticle

Abstract

We have observed artificial radionuclides originated from the TEPCO Fukushima Daiichi Nuclear Power Plant accident. This paper presents our monitoring results(March to May, 2011) for (1) γ-ray dose rate (2) airborne radioactivity (3) radioactivity deposited onto the basin and (4) radioactivity in tap water. Regarding γ-ray dose rate, no increase was observed. A small amount of artificial radioactivity(<sup>131</sup>I, <sup>134</sup>Cs, <sup>136</sup>Cs, <sup>137</sup>Cs and <sup>132</sup>Te) was found from airborne dust samples. While <sup>131</sup>I was detected two weeks after the accident, <sup>134</sup>Cs and <sup>137</sup>Cs were detected three weeks after. Integrated amount of activity was 14mBq/m<sup>3</sup> for <sup>131</sup>I, 11mBq/m<sup>3</sup> for <sup>134</sup>Cs and 9.5mBq/m<sup>3</sup> for <sup>137</sup>Cs. The monitoring results indicated that a plume with relatively high radioactivity passed through our monitoring station during April 6 - 7. Atmospheric diffusion simulation analyses reveal this. <sup>131</sup>I, <sup>134</sup>Cs and <sup>137</sup>Cs were also measured from monthly-monitored deposition. Total depositions for three months were 4.2Bq/m<sup>2</sup> for <sup>131</sup>I, 0.85Bq/m<sup>2</sup> for <sup>134</sup>Cs and 0.84Bq/m<sup>2</sup> for <sup>137</sup>Cs. No artificial radionuclide was found for tap water samples. The dose from these artificial radionuclides was estimated to be 0.23μSv/y, which was too small to cause health effects.
Original languageJapanese
Pages (from-to)847-855
Number of pages9
JournalRadioisotopes
Volume62
Issue number11
DOIs
Publication statusPublished - 2013

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fallout
nuclear power plants
accidents
radioactivity
radioactive isotopes
taps
dosage
atmospheric diffusion
rays
water
health
plumes
stations
dust
causes
simulation

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福岡県における福島第一原子力発電所事故初期の放射線影響評価. / 楢崎幸範; 竹村俊彦; 天野光; 石川徹夫; 藤高和信.

In: Radioisotopes, Vol. 62, No. 11, 2013, p. 847-855.

Research output: Contribution to journalArticle

楢崎幸範 ; 竹村俊彦 ; 天野光 ; 石川徹夫 ; 藤高和信. / 福岡県における福島第一原子力発電所事故初期の放射線影響評価. In: Radioisotopes. 2013 ; Vol. 62, No. 11. pp. 847-855.
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abstract = "We have observed artificial radionuclides originated from the TEPCO Fukushima Daiichi Nuclear Power Plant accident. This paper presents our monitoring results(March to May, 2011) for (1) γ-ray dose rate (2) airborne radioactivity (3) radioactivity deposited onto the basin and (4) radioactivity in tap water. Regarding γ-ray dose rate, no increase was observed. A small amount of artificial radioactivity(131I, 134Cs, 136Cs, 137Cs and 132Te) was found from airborne dust samples. While 131I was detected two weeks after the accident, 134Cs and 137Cs were detected three weeks after. Integrated amount of activity was 14mBq/m3 for 131I, 11mBq/m3 for 134Cs and 9.5mBq/m3 for 137Cs. The monitoring results indicated that a plume with relatively high radioactivity passed through our monitoring station during April 6 - 7. Atmospheric diffusion simulation analyses reveal this. 131I, 134Cs and 137Cs were also measured from monthly-monitored deposition. Total depositions for three months were 4.2Bq/m2 for 131I, 0.85Bq/m2 for 134Cs and 0.84Bq/m2 for 137Cs. No artificial radionuclide was found for tap water samples. The dose from these artificial radionuclides was estimated to be 0.23μSv/y, which was too small to cause health effects.",
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AU - 石川, 徹夫

AU - 藤高, 和信

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AB - We have observed artificial radionuclides originated from the TEPCO Fukushima Daiichi Nuclear Power Plant accident. This paper presents our monitoring results(March to May, 2011) for (1) γ-ray dose rate (2) airborne radioactivity (3) radioactivity deposited onto the basin and (4) radioactivity in tap water. Regarding γ-ray dose rate, no increase was observed. A small amount of artificial radioactivity(131I, 134Cs, 136Cs, 137Cs and 132Te) was found from airborne dust samples. While 131I was detected two weeks after the accident, 134Cs and 137Cs were detected three weeks after. Integrated amount of activity was 14mBq/m3 for 131I, 11mBq/m3 for 134Cs and 9.5mBq/m3 for 137Cs. The monitoring results indicated that a plume with relatively high radioactivity passed through our monitoring station during April 6 - 7. Atmospheric diffusion simulation analyses reveal this. 131I, 134Cs and 137Cs were also measured from monthly-monitored deposition. Total depositions for three months were 4.2Bq/m2 for 131I, 0.85Bq/m2 for 134Cs and 0.84Bq/m2 for 137Cs. No artificial radionuclide was found for tap water samples. The dose from these artificial radionuclides was estimated to be 0.23μSv/y, which was too small to cause health effects.

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