Distribution and risk assessment of radionuclides released by Fukushima nuclear accident at the northwest Pacific. (April 2015)

• Record Type: Journal Article
• Authors: Yu, Wen; He, Jianhua; Lin, Wuhui; Li, Yiliang; Men, Wu; Wang, Fenfen; Huang, Jiang
• Is Part Of: Journal of environmental radioactivity. Volume 142(2015:Apr.)
• Page Start: 54
• Page End: 61
• Publication Date: 2015-04
• Subjects: Marine radioactivity -- Radiological risk assessment -- Squid -- Fukushima Dai-ichi nuclear power plant accident; Radioactivity -- Periodicals; Radiation, Background -- Periodicals; Radioecology -- Periodicals; Radioactive pollution -- Periodicals; Environmental Pollutants -- Periodicals; Radioactive Pollutants -- Periodicals; Radioactivity -- Periodicals; Radioécologie -- Périodiques; Pollution radioactive -- Périodiques; Fond de rayonnement -- Périodiques; 539.752
• DOI: 10.1016/j.jenvrad.2015.01.005
• Languages: English
• ISSNs: 0265-931X

Abstract

Abstract: In order to understand the impact of Fukushima Nuclear Accident (FNA) on the marine environment, seawater and a composite squid ( Ommastrephe bartrami ) sample were collected on the monitoring cruise XT01 during June 16–July 4, 2011. The concentration levels of Cesium-134, Cesium-137, Strontium-90, Silver-110m, Cobalt-58 and Cobalt-60 were measured both for the seawater and squid samples. The elevated activity levels of Cesium-134 and Cesium-137 were found in the sampling area. Cesium-134 and Silver-110m, which were usually undetectable before FNA, were also found in the squid sample, with the activity levels of 1.65 ± 0.13 Bq/kg-wet and 0.07 ± 0.01 Bq/kg-wet, respectively. The radiological assessment result showed that the radioactive release from the FNA would not have a significant adverse effect on marine biota at the population level. Highlights: Field marine radioactivity monitoring were conducted in 4 months after FNA. Elevated activity levels of Cs-137, Cs-134 and Sr-90 in seawater were found. Cs-134 and Ag-110 m were found in the squid sample. Radiological risk assessment on marine biota was done.