title: Distribution and risk assessment of radionuclides released by Fukushima nuclear accident at the northwest Pacific.
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-110 m, 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-110 m, 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.
authors: Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China. Electronic address: yuwen@tio.org.cn.
authors: Wen
authors: W
authors: Yu
authors: Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
authors: Jianhua
authors: J
authors: He
authors: Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
authors: Wuhui
authors: W
authors: Lin
authors: Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
authors: Yiliang
authors: Y
authors: Li
authors: Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
authors: Wu
authors: W
authors: Men
authors: Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
authors: Fenfen
authors: F
authors: Wang
authors: Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
authors: Jiang
authors: J
authors: Huang
mesh_terms: D000818:Animals; D049832:Decapodiformes / Q000378:metabolism*; D062406:Fukushima Nuclear Accident; D010140:Pacific Ocean; D011834:Radiation Monitoring; D018570:Risk Assessment; D012623:Seawater / Q000032:analysis*; D014875:Water Pollutants, Radioactive / Q000032:analysis* / Q000378:metabolism*
chemical_list: D014875:Water Pollutants, Radioactive
keywords: Fukushima Dai-ichi nuclear power plant accident; Marine radioactivity; Radiological risk assessment; Squid