Radioactive cesium from Fukushima expected to reach U.S. West Coast in 5 years

The JAEA map predicting the spread of cesium-137 leaking from the crippled Fukushima No. 1 Nuclear Power Plant. (Courtesy of JAEA)

Radioactive cesium leaking from the tsunami-hit Fukushima No. 1 Nuclear Power Plant is estimated to reach the West Coast of the United States in five years after its density declines considerably, according to a semi-governmental research institute.