TY - JOUR
T1 - Surveillance of strontium-90 in foods after the Fukushima Daiichi nuclear power plant accident
AU - Nabeshi, Hiromi
AU - Tsutsumi, Tomoaki
AU - Uekusa, Yoshinori
AU - Hachisuka, Akiko
AU - Matsuda, Rieko
AU - Teshima, Reiko
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - As a result of the Fukushima Daiichi nuclear power plant (NPP) accident, various radionuclides were released into the environment. In this study, we surveyed strontium-90 (90Sr) concentrations in several foodstuffs. Strontium-90 is thought to be the third most important residual radionuclide in food collected after the Fukushima Daiichi, NPP accident after following cesium-137 (137Cs) and cesium-134 (134Cs). Results of 90Sr analyses indicated that 90Sr was detect in 25 of the 40 radioactive cesium (r-Cs) positive samples collected in areas around the Fukushima Daiichi NPP, ranging in distance from 50 to 250 km. R-Cs positive samples were defined as containing both 134Cs and 137Cs which are considered to be indicators of the after-effects of the Fukushima Daiichi NPP accident. We also detected 90Sr in 8 of 13 r-Cs negative samples, in which 134Cs was not detected. Strontium-90 concentrations in the r-Cs positive samples did not significantly exceed the 90Sr concentrations in r-Cs negative samples or the 90Sr concentration ranges in comparable food groups found in previous surveys before the Fukushima Daiichi NPP accident. Thus, 90Sr concentrations in r-Cs positive samples were indistinguishable from the background 90Sr concentrations arising from global fallout prior to the Fukushima accident, suggesting that no marked increase of 90Sr concentrations has occurred in r-Cs positive samples as a result of the Fukushima Daiichi NPP accident.
AB - As a result of the Fukushima Daiichi nuclear power plant (NPP) accident, various radionuclides were released into the environment. In this study, we surveyed strontium-90 (90Sr) concentrations in several foodstuffs. Strontium-90 is thought to be the third most important residual radionuclide in food collected after the Fukushima Daiichi, NPP accident after following cesium-137 (137Cs) and cesium-134 (134Cs). Results of 90Sr analyses indicated that 90Sr was detect in 25 of the 40 radioactive cesium (r-Cs) positive samples collected in areas around the Fukushima Daiichi NPP, ranging in distance from 50 to 250 km. R-Cs positive samples were defined as containing both 134Cs and 137Cs which are considered to be indicators of the after-effects of the Fukushima Daiichi NPP accident. We also detected 90Sr in 8 of 13 r-Cs negative samples, in which 134Cs was not detected. Strontium-90 concentrations in the r-Cs positive samples did not significantly exceed the 90Sr concentrations in r-Cs negative samples or the 90Sr concentration ranges in comparable food groups found in previous surveys before the Fukushima Daiichi NPP accident. Thus, 90Sr concentrations in r-Cs positive samples were indistinguishable from the background 90Sr concentrations arising from global fallout prior to the Fukushima accident, suggesting that no marked increase of 90Sr concentrations has occurred in r-Cs positive samples as a result of the Fukushima Daiichi NPP accident.
KW - Radioactive cesium (Cs)
KW - Strontium-90 (Sr)
KW - Surveillance
KW - The Fukushima Daiichi nuclear power plant (NPP) accident
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U2 - 10.3358/shokueishi.56.133
DO - 10.3358/shokueishi.56.133
M3 - Article
C2 - 26346857
AN - SCOPUS:84940742303
VL - 56
SP - 133
EP - 143
JO - Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan
JF - Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan
SN - 0015-6426
IS - 4
ER -