Task Group "Radiation Protection for Waste Disposal Containing Natural Radioactive Nuclides"; Outline and important issues

Saito, Tatsuo  

Task Group discussed the issues regarding the radiation protection of waste containing natural radionuclides from the perspective of radiation protection. The exposure of the disposal of uranium generated from uranium treating facilities is in planned exposure situation, but may become a source of existing exposure when the institutional control of the repository is over. Uranium disposal is insignificant as the source of exposure to future generations when a disposal plan of no more than 1 Bq/g or 1 mSv/year is established before the institutional control is finished. If only uranium that can be disposed of within the framework of planned exposure can be disposed of, there may be legacy uranium. For future generations that inherit the existing exposure of uranium, it is necessary to consider what the present generation should do and how far it should fulfill its exposure assessment or reduction.