Fukushima radiation

Fukushima radiation in Canadian waters; Scientists have detected radiation from Japan's 2011 nuclear disaster off the Canadian coast. Experts disagree as to whether the amount detected constitutes a dangerous level or not. Trace amounts of the radioactive isotopes cesium-134 and cesium-137 have been found in samples that were collected close to Vancouver Island in British Columbia. According to the Integrated Fukushima Ocean Radionuclide Monitoring (InFORM) Network, it was the first time that traces of cesium-134 had been detected off North American coasts. As cesium-134 has a two-year half-life, any cesium-134 detected in the ocean today can only have been added recently - making Fukushima the only possible source. Ken Buesseler, a marine chemist at Woods Hole Oceanographic Institution (WHOI), said in a statement: "Radioactivity can be dangerous, and we should be carefully monitoring the oceans after what is certainly the largest accidental release of radioactive contaminants to the oceans in history." He led an initiative that measured 60 sites along the U.S. and Canadian West Coast and Hawaii over the past 15 months for traces of radioactive isotopes from Fukushima. Using computer models, the scientist had already predicted that the traces would reach the coast....
http://www.dw.de/fukushima-radiation-in-canadian-waters/a-18367257