Oceanic simulation at Japan Atomic Energy Agency

Kawamura, Hideyuki  

The Japan Atomic Energy Agency (JAEA) performed oceanic dispersion simulations of radionuclides released from the Fukushima Daiichi Nuclear Power Plant. It was suggested that a part of the Fukushima-derived radionuclides was transported in the east by the Kuroshio Extension and was diluted by mesoscale eddies. JAEA also performed drift simulations of tsunami debris released by the Great East Japan Earthquake. It was suggested that a part of tsunami debris would be transported clockwise in the North Pacific and would be concentrated near the Hawaiian Islands. Recently, JAEA developed STEAMER that receives the forecast data of oceanic condition and forecasts the oceanic dispersion of radionuclides. STEAMER is in temporary operation at JAEA. STEAMER will be upgraded in the future.