Consideration of NPP Site Condition in Planned Decommissioning of Kori Unit 1

Kori Unit 1 was permanently shut down in June 2017 and became a commercial nuclear power plant to be dismantled for the first time in Korea. KHNP has selected the DECON strategy to acquire dismantling technology and know-how, and it is expected that the dismantling period will take about 15 years to open the site. However, the neighboring NPP, Kori-2, is in operation and the design life is scheduled to expire in April 2023. The Kori-1 decommissioning should include plans for the common facilities and the systems that affect the safe operation of Kori-2. This paper proposed a plan to dismantle common facilities after 2028, when Kori-2 starts dismantling. It is uncertain what will happen to the government's policy to extend of Kori-2's operation. However, in view of the design life of Kori-2 and recent government's nuclear policy decisions, Kori-1's decommissioning plan should be established considering Kori-2's decommissioning. Considering the proximity of Kori-2, it seems reasonable to set up a decommissioning strategy for Kori-1 along with the Kori-2.