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California Coastal Commission downplays fears about Fukushima-derived ocean radiation | Georgia Straight, Vancouver’s News & Entertainment Weekly

“Over the last three years, the radioactive ocean plume has been carried eastward by ocean currents, becoming increasingly diluted as it spreads over an ever-larger area and mixes to greater depths,” the report states. “The leading edge of the plume appears to have reached North America off of Vancouver Island, and could possibly reach California within the next year.”

The report notes that Fukushima-derived radionuclides, chiefly cesium 137, are “expected to be only slightly above the pre-accident background”.

Cesium 137 has a half-life of 30 years.

“Radioactive cesium derived from Fukushima has been detected at low levels in the tissues of highly-migratory fish species such as Pacific Bluefin tuna, which appear to have accumulated the cesium in their juvenile rearing grounds in the western Pacific,” the report adds.

It also points out that levels of Fukushima-derived radionuclides in air, drinking water, food, seawater, and marine life in California “are extremely low relative to the pre-existing background from naturally-occurring radionuclides”.

This “supports the idea that it will pose little additional risk to humans or marine life”.



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