Measurements of radiocesium in animals, plants and fungi in Svalbard after the Fukushima Daiichi nuclear power plant disaster
Yoshihiro Mezaki,
Shigeaki Kato,
Osamu Nishikawa,
Isao Takashima,
Masaharu Tsubokura,
Haruka Minowa,
Tadashi Asakura,
Tomokazu Matsuura,
Haruki Senoo
Affiliations
Yoshihiro Mezaki
Department of Laboratory Medicine, The Jikei University School of Medicine, Tokyo, Japan; Corresponding author.
Shigeaki Kato
Center for Regional Cooperation, Iwaki Meisei University, Fukushima, Japan
Osamu Nishikawa
Department of Earth Resource Science, Akita University Graduate School of International Resource Sciences, Akita, Japan
Isao Takashima
Akita University, Akita, Japan
Masaharu Tsubokura
Department of Radiation Protection, Soma Central Hospital, Fukushima, Japan
Haruka Minowa
Radioisotope Research Facilities, The Jikei University School of Medicine, Tokyo, Japan
Tadashi Asakura
Radioisotope Research Facilities, The Jikei University School of Medicine, Tokyo, Japan
Tomokazu Matsuura
Department of Laboratory Medicine, The Jikei University School of Medicine, Tokyo, Japan
Haruki Senoo
Department of Cell Biology and Morphology, Akita University Graduate School of Medicine, Akita, Japan; Health Center for the Elderly Kurakake-no-sato, Social Welfare Corporation Keijinkai, Akita, Japan; Corresponding author.
An earthquake struck the eastern part of Japan on March 11, 2011. The Fukushima Daiichi nuclear power plant was severely damaged by the earthquake and subsequent tsunami, leading to the emission of large amounts of radioactive pollutants, including 134Cs and 137Cs, into the environment. From August 23 to September 1 in 2011, and from August 27 to September 4 in 2013, we collected samples of animals, plants, fungi and lichens from Svalbard, Norway and measured the radioactivity of 134Cs and 137Cs contained in the samples. Though no radioactivity of 134Cs, which has a half-life of approximately 2 years, was observed, radioactivity of 137Cs, which has a half-life of approximately 30 years, was observed in some samples of lichens and fungi. We failed to detect the radioactivity of 134Cs in any of the samples we collected, therefore, it was impossible to say clearly that the radioactivity is derived from Fukushima or not. Nevertheless, the radioactivity data documented in this report are a useful reference for the future surveys of radioactivity within the Arctic.
