Fukushima-derived radioactivity measurements in Pacific salmon and soil samples collected in British Columbia, Canada

Despite the many studies that have shown minimal health risks to individuals living outside of Japan following the Fukushima Nuclear Accident, there are persisting concerns regarding the consumption of Pacific seafood that may be contaminated with radioactive species from Fukushima. To address these concerns, the activity concentrations of anthropogenic 134Cs and 137Cs, as well as naturally occurring 40K, were measured in Pacific salmon collected from Kilby Provincial Park, British Columbia (BC), in 2013 and from the Quesnel River, BC, in 2014 using low-background gamma-ray spectroscopy. In addition, soil samples and a single roof-debris sample were collected and analysed to provide a record of Fukushima-derived contamination in BC. Cesium-134 was not detected in the salmon samples. Cesium-137 was not detected in any of the sockeye or chum samples, although it was detected in all of the Chinook samples. The weighted average (±1σ) 137Cs activity concentration in the Chinook salmon collected in 2013 and 201...

尽管许多研究表明福岛核事故后居住在日本境外的个人健康风险极小，但对于食用可能受到福岛放射性物质污染的太平洋海产品的担忧仍然存在。为了解决这些担忧，2013年在不列颠哥伦比亚省（BC）基尔比省立公园以及2014年在BC省奎斯内尔河采集的太平洋鲑鱼，使用低本底伽马射线光谱法测量了人为产生的^{134}Cs和^{137}Cs以及天然存在的^{40}K的放射性活度浓度。此外，还采集并分析了土壤样本和一个屋顶碎片样本，以提供BC省福岛衍生污染的记录。在鲑鱼样本中未检测到^{134}Cs。在所有的红鲑和狗鲑样本中均未检测到^{137}Cs，但在所有的奇努克鲑样本中均检测到了。2013年和201...采集的奇努克鲑鱼中^{137}Cs放射性活度浓度的加权平均值（±1σ）