Iodine-129 concentration in seawater near Fukushima before and after the accident at the Fukushima Daiichi Nuclear Power Plant
Anthropogenic radionuclides were released into the environment in large quantities by the Fukushima Daiichi Nuclear Power Plant (1FNPP) accident. To evaluate accident-derived <sup>129</sup>I, the <sup>129</sup>I concentrations in seawater before and after the accident were co...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2013-06-01
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| Series: | Biogeosciences |
| Online Access: | http://www.biogeosciences.net/10/3839/2013/bg-10-3839-2013.pdf |
| _version_ | 1811298836589576192 |
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| author | T. Suzuki S. Otosaka J. Kuwabara H. Kawamura T. Kobayashi |
| author_facet | T. Suzuki S. Otosaka J. Kuwabara H. Kawamura T. Kobayashi |
| author_sort | T. Suzuki |
| collection | DOAJ |
| description | Anthropogenic radionuclides were released into the environment in large quantities by the Fukushima Daiichi Nuclear Power Plant (1FNPP) accident. To evaluate accident-derived <sup>129</sup>I, the <sup>129</sup>I concentrations in seawater before and after the accident were compared. <br><br> Before the accident (2008–2009), the <sup>129</sup>I concentrations in the western margin of the North Pacific between 32° N and 44° N showed a latitudinal gradient that was expressed as a linear function of latitude. The highest and average <sup>129</sup>I concentrations after the accident were 73 times and approximately 8 times, respectively, higher than those before the accident in this study area. Considering the distribution of <sup>129</sup>I in surface seawater, the accident-derived <sup>129</sup>I in the southern and northern stations of the 1FNPP was predominantly supplied by seawater advection and atmospheric deposition (including microbial volatilization), respectively. <br><br> As of October 2011, depth profiles of <sup>129</sup>I revealed that <sup>129</sup>I originating from the 1FNPP existed mainly in the upper 100 m depth. From the depth profiles, the cumulative inventories of accident-derived <sup>129</sup>I were estimated to be (1.6–9.6) × 10<sup>12</sup> atoms m<sup>−2</sup> in this study area. <br><br> On the basis of the <sup>129</sup>I data in the seawater near Fukushima, the effective dose of <sup>129</sup>I from seafood ingestion was much smaller than the annual dose limit. |
| first_indexed | 2024-04-13T06:26:09Z |
| format | Article |
| id | doaj.art-24c84131903649048323a9d1655f4b16 |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-04-13T06:26:09Z |
| publishDate | 2013-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-24c84131903649048323a9d1655f4b162022-12-22T02:58:25ZengCopernicus PublicationsBiogeosciences1726-41701726-41892013-06-011063839384710.5194/bg-10-3839-2013Iodine-129 concentration in seawater near Fukushima before and after the accident at the Fukushima Daiichi Nuclear Power PlantT. SuzukiS. OtosakaJ. KuwabaraH. KawamuraT. KobayashiAnthropogenic radionuclides were released into the environment in large quantities by the Fukushima Daiichi Nuclear Power Plant (1FNPP) accident. To evaluate accident-derived <sup>129</sup>I, the <sup>129</sup>I concentrations in seawater before and after the accident were compared. <br><br> Before the accident (2008–2009), the <sup>129</sup>I concentrations in the western margin of the North Pacific between 32° N and 44° N showed a latitudinal gradient that was expressed as a linear function of latitude. The highest and average <sup>129</sup>I concentrations after the accident were 73 times and approximately 8 times, respectively, higher than those before the accident in this study area. Considering the distribution of <sup>129</sup>I in surface seawater, the accident-derived <sup>129</sup>I in the southern and northern stations of the 1FNPP was predominantly supplied by seawater advection and atmospheric deposition (including microbial volatilization), respectively. <br><br> As of October 2011, depth profiles of <sup>129</sup>I revealed that <sup>129</sup>I originating from the 1FNPP existed mainly in the upper 100 m depth. From the depth profiles, the cumulative inventories of accident-derived <sup>129</sup>I were estimated to be (1.6–9.6) × 10<sup>12</sup> atoms m<sup>−2</sup> in this study area. <br><br> On the basis of the <sup>129</sup>I data in the seawater near Fukushima, the effective dose of <sup>129</sup>I from seafood ingestion was much smaller than the annual dose limit.http://www.biogeosciences.net/10/3839/2013/bg-10-3839-2013.pdf |
| spellingShingle | T. Suzuki S. Otosaka J. Kuwabara H. Kawamura T. Kobayashi Iodine-129 concentration in seawater near Fukushima before and after the accident at the Fukushima Daiichi Nuclear Power Plant Biogeosciences |
| title | Iodine-129 concentration in seawater near Fukushima before and after the accident at the Fukushima Daiichi Nuclear Power Plant |
| title_full | Iodine-129 concentration in seawater near Fukushima before and after the accident at the Fukushima Daiichi Nuclear Power Plant |
| title_fullStr | Iodine-129 concentration in seawater near Fukushima before and after the accident at the Fukushima Daiichi Nuclear Power Plant |
| title_full_unstemmed | Iodine-129 concentration in seawater near Fukushima before and after the accident at the Fukushima Daiichi Nuclear Power Plant |
| title_short | Iodine-129 concentration in seawater near Fukushima before and after the accident at the Fukushima Daiichi Nuclear Power Plant |
| title_sort | iodine 129 concentration in seawater near fukushima before and after the accident at the fukushima daiichi nuclear power plant |
| url | http://www.biogeosciences.net/10/3839/2013/bg-10-3839-2013.pdf |
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