Distribution of artificial radionuclides (110mAg, 129mTe, 134Cs, 137Cs) in surface soils from Miyagi Prefecture, northeast Japan, following the 2011 Fukushima Dai-ichi nuclear power plant accident

Takahiro Watanabe, Noriyoshi Tsuchiya, Yasuji Oura, Mitsuru Ebihara, Chihiro Inoue, Nobuo Hirano, Ryoichi Yamada, Shin Ichi Yamasaki, Atsushi Okamoto, Fumiko Watanabe Nara, Keishi Nunohara

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The Tohoku earthquake and tsunami occurred off the Pacific coast of Japan in March 2011 and caused the Fukushima Dai-ichi nuclear power plant accident. To assess the distribution of artificial radionuclides in Miyagi Prefecture (northeastern Japan), we measured the activity concentrations of 110mAg, 129mTe, 134Cs, and 137Cs in surface soil samples that were collected from 60-190 km north of the power plant approximately 1 month (April 16-29, 2011) after the earthquake. Since the studied samples were obtained from depths of 0-1 cm, the activity concentrations we determined were higher than those reported by the Japanese Government, whose measurements were based on soil samples obtained from depths of 0-5 cm. We found relatively high concentrations of radionuclides in surface soils in the southern and northern parts of Miyagi Prefecture. In the south, close to the border with Fukushima Prefecture, the total activity concentrations in the period April 16-29, 2011, reached approximately 27,600 Bq/kg dry soil. Relatively high total concentrations (2600-6600 Bq/kg dry soil) were also found in the northern part of Miyagi Prefecture (north Osaki, Kurihara, and Kesen-numa), but relatively low concentrations (400-1900 Bq/kg dry soil) were found in Sendai city and other areas in central Miyagi Prefecture (Higashimatsushima, south Osaki, Ishinomaki, and Onagawa). The concentrations found are consistent with the spatial variation in radiation dose rates in the air in Miyagi Prefecture.

Original languageEnglish
Pages (from-to)279-285
Number of pages7
JournalGeochemical Journal
Volume46
Issue number4
DOIs
Publication statusPublished - 2012 Jan 1
Externally publishedYes

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nuclear power plants
accidents
nuclear power plant
Radioisotopes
radioactive isotopes
Nuclear power plants
accident
radionuclide
soils
Japan
Accidents
soil surface
Soils
soil
earthquake
Earthquakes
earthquakes
tsunami
power plant
Tsunamis

Keywords

  • Caesium
  • Fukushima Dai-ichi nuclear power plant accident
  • Miyagi Prefecture
  • Radioactivity
  • Surface soils

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

Distribution of artificial radionuclides (110mAg, 129mTe, 134Cs, 137Cs) in surface soils from Miyagi Prefecture, northeast Japan, following the 2011 Fukushima Dai-ichi nuclear power plant accident. / Watanabe, Takahiro; Tsuchiya, Noriyoshi; Oura, Yasuji; Ebihara, Mitsuru; Inoue, Chihiro; Hirano, Nobuo; Yamada, Ryoichi; Yamasaki, Shin Ichi; Okamoto, Atsushi; Nara, Fumiko Watanabe; Nunohara, Keishi.

In: Geochemical Journal, Vol. 46, No. 4, 01.01.2012, p. 279-285.

Research output: Contribution to journalArticle

Watanabe, Takahiro ; Tsuchiya, Noriyoshi ; Oura, Yasuji ; Ebihara, Mitsuru ; Inoue, Chihiro ; Hirano, Nobuo ; Yamada, Ryoichi ; Yamasaki, Shin Ichi ; Okamoto, Atsushi ; Nara, Fumiko Watanabe ; Nunohara, Keishi. / Distribution of artificial radionuclides (110mAg, 129mTe, 134Cs, 137Cs) in surface soils from Miyagi Prefecture, northeast Japan, following the 2011 Fukushima Dai-ichi nuclear power plant accident. In: Geochemical Journal. 2012 ; Vol. 46, No. 4. pp. 279-285.
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abstract = "The Tohoku earthquake and tsunami occurred off the Pacific coast of Japan in March 2011 and caused the Fukushima Dai-ichi nuclear power plant accident. To assess the distribution of artificial radionuclides in Miyagi Prefecture (northeastern Japan), we measured the activity concentrations of 110mAg, 129mTe, 134Cs, and 137Cs in surface soil samples that were collected from 60-190 km north of the power plant approximately 1 month (April 16-29, 2011) after the earthquake. Since the studied samples were obtained from depths of 0-1 cm, the activity concentrations we determined were higher than those reported by the Japanese Government, whose measurements were based on soil samples obtained from depths of 0-5 cm. We found relatively high concentrations of radionuclides in surface soils in the southern and northern parts of Miyagi Prefecture. In the south, close to the border with Fukushima Prefecture, the total activity concentrations in the period April 16-29, 2011, reached approximately 27,600 Bq/kg dry soil. Relatively high total concentrations (2600-6600 Bq/kg dry soil) were also found in the northern part of Miyagi Prefecture (north Osaki, Kurihara, and Kesen-numa), but relatively low concentrations (400-1900 Bq/kg dry soil) were found in Sendai city and other areas in central Miyagi Prefecture (Higashimatsushima, south Osaki, Ishinomaki, and Onagawa). The concentrations found are consistent with the spatial variation in radiation dose rates in the air in Miyagi Prefecture.",
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AU - Watanabe, Takahiro

AU - Tsuchiya, Noriyoshi

AU - Oura, Yasuji

AU - Ebihara, Mitsuru

AU - Inoue, Chihiro

AU - Hirano, Nobuo

AU - Yamada, Ryoichi

AU - Yamasaki, Shin Ichi

AU - Okamoto, Atsushi

AU - Nara, Fumiko Watanabe

AU - Nunohara, Keishi

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N2 - The Tohoku earthquake and tsunami occurred off the Pacific coast of Japan in March 2011 and caused the Fukushima Dai-ichi nuclear power plant accident. To assess the distribution of artificial radionuclides in Miyagi Prefecture (northeastern Japan), we measured the activity concentrations of 110mAg, 129mTe, 134Cs, and 137Cs in surface soil samples that were collected from 60-190 km north of the power plant approximately 1 month (April 16-29, 2011) after the earthquake. Since the studied samples were obtained from depths of 0-1 cm, the activity concentrations we determined were higher than those reported by the Japanese Government, whose measurements were based on soil samples obtained from depths of 0-5 cm. We found relatively high concentrations of radionuclides in surface soils in the southern and northern parts of Miyagi Prefecture. In the south, close to the border with Fukushima Prefecture, the total activity concentrations in the period April 16-29, 2011, reached approximately 27,600 Bq/kg dry soil. Relatively high total concentrations (2600-6600 Bq/kg dry soil) were also found in the northern part of Miyagi Prefecture (north Osaki, Kurihara, and Kesen-numa), but relatively low concentrations (400-1900 Bq/kg dry soil) were found in Sendai city and other areas in central Miyagi Prefecture (Higashimatsushima, south Osaki, Ishinomaki, and Onagawa). The concentrations found are consistent with the spatial variation in radiation dose rates in the air in Miyagi Prefecture.

AB - The Tohoku earthquake and tsunami occurred off the Pacific coast of Japan in March 2011 and caused the Fukushima Dai-ichi nuclear power plant accident. To assess the distribution of artificial radionuclides in Miyagi Prefecture (northeastern Japan), we measured the activity concentrations of 110mAg, 129mTe, 134Cs, and 137Cs in surface soil samples that were collected from 60-190 km north of the power plant approximately 1 month (April 16-29, 2011) after the earthquake. Since the studied samples were obtained from depths of 0-1 cm, the activity concentrations we determined were higher than those reported by the Japanese Government, whose measurements were based on soil samples obtained from depths of 0-5 cm. We found relatively high concentrations of radionuclides in surface soils in the southern and northern parts of Miyagi Prefecture. In the south, close to the border with Fukushima Prefecture, the total activity concentrations in the period April 16-29, 2011, reached approximately 27,600 Bq/kg dry soil. Relatively high total concentrations (2600-6600 Bq/kg dry soil) were also found in the northern part of Miyagi Prefecture (north Osaki, Kurihara, and Kesen-numa), but relatively low concentrations (400-1900 Bq/kg dry soil) were found in Sendai city and other areas in central Miyagi Prefecture (Higashimatsushima, south Osaki, Ishinomaki, and Onagawa). The concentrations found are consistent with the spatial variation in radiation dose rates in the air in Miyagi Prefecture.

KW - Caesium

KW - Fukushima Dai-ichi nuclear power plant accident

KW - Miyagi Prefecture

KW - Radioactivity

KW - Surface soils

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