科研之友
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摘要
Even though many studies have shown that radioactive caesium levels in fish caught outside of Japan were below experimental detection limits of a few Bq kg(-1), significant public concern has been expressed about the safety of consuming seafood from the Pacific Ocean following the Fukushima-Daiichi nuclear accident. To address the public concerns, samples of commonly consumed salmon and groundfish harvested from the Canadian west coast in 2013 were analysed for radioactive caesium. None of the fish samples analysed in this study contained any detectable levels of Cs-134 and Cs-137 under given experimental setting with the average detection limit of similar to 2 Bq kg(-1). Using a conservative worst-case scenario where all fish samples would contain Cs-137 exactly at the detection limit level and Cs-134 at half of the detection limit level (to account for much shorter half-life of Cs-134), the resulting radiation dose for people from consumption of this fish would be a very small fraction of the annual dose from exposure to natural background radiation in Canada. Therefore, fish, such as salmon and groundfish, from the Canadian west coast are of no radiological health concern.
- 出版日期2015-2
