Kori-2 Nuclear Reactor Restarts After Three-Year Halt, Boosting Energy Security and Grid Stability

The Kori-2 nuclear reactor has resumed power generation after a three-year shutdown, following final regulatory approval and comprehensive facility upgrades.

This restart was driven by the need for energy security amid volatile LNG prices and a government policy aimed at increasing nuclear power's share in the energy mix.

The plant is expected to provide stable baseload power, reduce carbon emissions by replacing gas generation, and lower the country's exposure to fluctuating fuel costs.

The Kori-2 nuclear power plant has resumed operations after a three-year suspension.

This restart wasn't a sudden event but the culmination of carefully aligned factors across policy, regulation, and market dynamics. The key question is, why now? The answer lies in a powerful combination of national strategy and economic necessity.

First, the decision was driven by a pressing need for energy security. In early 2026, volatility in the Asian spot Liquefied Natural Gas (LNG) market served as a stark reminder of the risks associated with fossil fuel dependency. By bringing a reliable baseload power source like Kori-2 back online, the country can better shield itself from unpredictable global energy price swings. This move provides a stable, domestically controlled energy supply, which is crucial for economic stability.

Second, the restart is a direct implementation of clear government policy. In 2025, the government finalized its '11th Basic Plan for Electricity Supply and Demand,' which set an ambitious target to increase nuclear power's share of the energy mix to 31.8% by 2030. The Nuclear Safety and Security Commission's (NSSC) approval for Kori-2's 'continued operation' in late 2025 was a critical step that aligned regulatory action with this long-term national goal. This created a clear and consistent signal for the energy sector.

Finally, strong public support paved the way for a smooth restart. With recent polls indicating that around 90% of the public sees nuclear power as necessary, the political risks often associated with nuclear energy were significantly reduced. This social consensus provided policymakers with the confidence to move forward decisively.

In quantitative terms, Kori-2's return is significant. It's projected to generate approximately 5.05 TWh of electricity annually. This will not only displace more expensive gas-fired power, potentially avoiding up to $330 million in annual fuel costs, but also prevent about 1.79 million tons of CO2 emissions each year. It's a move that strengthens the grid, the economy, and environmental goals simultaneously.

Glossary
Baseload: The minimum level of demand on an electrical grid over a span of time. Baseload power plants, like nuclear reactors, operate continuously to meet this constant demand.
Continued Operation: The process of allowing a nuclear power plant to operate beyond its initial license term, following a comprehensive safety review and necessary upgrades.

Kori-2 Nuclear Reactor Restarts After Three-Year Halt, Boosting Energy Security and Grid Stability

The Kori-2 nuclear reactor has resumed power generation after a three-year shutdown, following final regulatory approval and comprehensive facility upgrades.

This restart was driven by the need for energy security amid volatile LNG prices and a government policy aimed at increasing nuclear power's share in the energy mix.

The plant is expected to provide stable baseload power, reduce carbon emissions by replacing gas generation, and lower the country's exposure to fluctuating fuel costs.

The Kori-2 nuclear power plant has resumed operations after a three-year suspension.

Glossary
Baseload: The minimum level of demand on an electrical grid over a span of time. Baseload power plants, like nuclear reactors, operate continuously to meet this constant demand.
Continued Operation: The process of allowing a nuclear power plant to operate beyond its initial license term, following a comprehensive safety review and necessary upgrades.