A proposal for a differentiated radiation protection program for the decommissioning of nuclear power plants compared to the operation of nuclear power plants.

While fundamental radiological protection standards remain consistent for operating and decommissioning nuclear power plants (NPPs), the unique challenges of decommissioning require a specialized program. This study analyzes the radiological characteristics of decommissioned NPPs and proposes a tailored protection program. Key findings indicate that although total radioactive inventory decreases, radiation dose rates in work areas can fluctuate significantly during the removal and movement of structures and components. The risk of internal exposure and alpha contamination increases due to fine aerosols generated during cutting. The proposed program includes five key elements: ALARA (As Low As Reasonably Achievable), effective access control and monitoring, high-frequency radiological surveys, contamination control, and prevention of internal exposure. This approach aims to optimize radiation exposure, prioritize the removal of high-radiation sources, expand real-time monitoring, and enhance worker training. The study's results aim to bolster safety and establish a robust radiological protection system for future Korean NPP decommissioning efforts.