Safe radiation management is essential not only for operational nuclear power plants but also for nuclear plants to be decommissioned. When spent nuclear fuel is present on-site, meticulous radiation emergency plans are necessary to ensure safety. In Korea, numerous radiation emergency plans have been established for operational nuclear reactors. These plans delineate distinct response mitigation measures for white, blue, and red emergencies. However, clear regulations are yet to be devised for radiation emergency plans for reactors to be decommission. Therefore, this study investigated the decommissioning plan and status of Kori unit 1 to comprehensively analyze the current status of decommissioning safety in Korea. In this study, radiation emergency plans of decommissioning nuclear power plants abroad were reviewed to confirm radiation emergency action levels. Furthermore, radioactive waste treatment facilities, to be used for decommissioning reactors in Korea were evaluated. Moreover, the study assessed emergency plans (especially, emergency initiating conditions) for operational nuclear power plants in Korea for potential use in the decommissioning phase. This study proposed an emergency initiating condition that can be used for decommissioning reactors in Korea. Considering the anticipated introduction of plasma torch melting facility in Korea, this study examined the conditions of radiation emergency plans can be altered. This study identified effective measures and guidelines for managing radiological emergency initiating conditions, and effective decommissioning of nuclear power plants in Korea.

1. Introduction
2. Current Status of DecommissioningNuclear Power Plant in Korea
    2.1 Decommissioning Strategy of Kori Unit 1
    2.2 Radioactive Waste Treatment Facility ofDecommissioning Nuclear Power Plant
3. Emergency Plan of Overseas DecommissioningNuclear Power Plant andPlasma Melting Facility for the NuclearIndustry
    3.1 Emergency Classification Levels in the U.S.
    3.2 The U.S. NRC Regulatory Guide-EmergencyPlanning for Decommissioning NuclearPower Reactors
    3.3 Emergency Cases of DecommissioningNuclear Power Plant in the U.S.
    3.4 Cases of Using Plasma Torch Melter forTreatment of Nuclear Plant Waste
4. Analysis of Radiological EmergencyPlan
    4.1 Classification Level of Radiological EmergencyInitiating Conditions for OperatingNuclear Power Plants
    4.2 Review of Alert Emergency
    4.3 Review of Site Area Emergency and GeneralEmergency
5. Discussion of Radiological EmergencyPlan for Decommissioning NuclearPower Plant in Korea
6. Conclusion
Conflict of Interest
Acknowledgements
REFERENCES

• Hye-Jin Son(KEPCO International Nuclear Graduate School, 658-91, Haemaji-ro, Seosaeng-myeon, Ulju-gun, Ulsan 45014, Republic of Korea)
• Chang-Lak Kim(KEPCO International Nuclear Graduate School, 658-91, Haemaji-ro, Seosaeng-myeon, Ulju-gun, Ulsan 45014, Republic of Korea) Corresponding author