原子炉恒久停止から廃止措置までのリスクについて
概要
For the planning of decommissioning and the establishment of appropriate safety control during its activity, risk assessment to understand the potential accident scenarios during decommissioning is essential. The decommissioning phase following permanent shutdown involves a complex process such as dismantling of equipment and facilities, demolition of building and structures. The decay heat and management of spent fuels also change by time during decommission. In comparison to nuclear power plants at operation, the risk of significant offsite effects is more unlikely, but more care must be taken in the risk assessment to capture the changes in activities and plant status during decommissioning. This article describes the general characteristic of radiological risk of nuclear power plants during the decommissioning.
