Development of internal dosimetry evaluation code for chronic exposure after intake of radionuclides (The 12th International Conference on Radiation Shielding (ICRS-12) and the 17th Topical Meeting of the Radiation Protection and Shielding Division of ANS (RPSD-2012)) -- (Accident of Fukushima Nuclear Power Plant and Its Influence)

The Fukushima Daiichi nuclear power plant accident resulted in a release of radionuclides to the environment and in the large land contamination. The national government and local governments implemented urgent protective actions to reduce internal exposure from ingestion of foods and tap water or inhalation of radionuclides after the accident. However, there has been some concern in evaluating internal exposure due to chronic intakes. In the present study, DSYS-chronic code was developed in order to evaluate internal exposure due to chronic intakes after the accident. The code can treat internal dosimetry for chronic exposure due to continuous and discontinuous intake. To validate the code, the results of equilibrium values or the dose coefficients for