Research results from the Nuclear Science and Engineering Center were used by the UNSCEAR for assessment of environmental impacts and radiation doses from the accident at the Fukushima Daiichi Nuclear Power Station.

2014.04.10

The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) has published the report on 2 April 2014 that summarizes results on assessment of the environmental impacts and radiation doses and health implications for the public and workers due to the Fukushima Daiichi nuclear power station accident (UNSCEAR 2013 REPORT Vol. I SOURCES, EFFECTS AND RISKS OF IONIZING RADIATION). For the assesssment, UNSCEAR referred eight research papers on inventories of radionuclides in the reactors and amounts of radionuclides released to the atmosphere and to the ocean published by the Research Group for Environmental Science and the Research Group for Nuclear Transmutation System at the Nuclear Science and Engineering Center. The amounts of radionuclides released to the atmosphere were combined with atmospheric transport, dispersion and deposition models and used to estimate distribution of radionuclides in the environment, where no measurements existed, and dose assessment.

New movies of dispersion and surface deposition of I-131 and Cs-137 over Eastern Japan have been added.

2011.12.07

Animations of dispersion simulations of radioactive materials discharged from the TEPCO's Fukushima Daiichi Nuclear Power Plant

2011.11.24

Research Group for Environmental Science has released results of analysis on the environmental transport of radioactive materials discharged to the atmosphere and ocean from the TEPCO's Fukushima Daiichi Nuclear Power Plant by using the computer simulation system: SPEEDI-MP (SPEEDI Multi-model Package) developed by the group. Here, animations created from these simulation results are presented.