Procedure for segregation of non-radioactive waste related to decommissioning nuclear facilities - Experiences on the Japan Power Demonstration Reactor dismantling

In the final stage of decommissioning nuclear facilities, building structur es are demolished to be green field conditions if dismantling is chosen as a decommissioning strategy. Since building structures are generally made fr om massive reinforced concrete materials, it is not a rational way to treat all concrete materials arising from its demolition as radioactive waste. S egregation of radioactive parts from building structures and measurement of radioactivity are therefore indispensable before demolishing building stru ctures. The procedure of decontamination and measurement of radioactivity w ere studied for demolition of building structures in consideration of treat ing waste as non-radioactive materials, on the basis of the concept publish ed by Nuclear Safely Commission. This procedure was then implemented in the Japan Power Demonstration Reactor dismantling demonstration project. The d ata obtained in the project relating to decontamination and measurement of radioactivity showed that the procedure was reasonable, and that the experi ences will be useful for future decommissioning of nuclear power plants in Japan. This report describes the procedure studied on the segregation of non-radio active waste related to decommissioning nuclear facilities, and the results of its implementation in the Japan Power Demonstration Reactor dismantling demonstration project.