nuclear power – South Korea is doubling down on nuclear energy for reliability and security, with forecasts pointing to 219.2 TWh by 2035 and capacity rising to 29.8 GW.
South Korea’s electricity future is being drawn with nuclear energy near the center of the map—an approach driven less by symbolism and more by the hard arithmetic of keeping lights on.
The focus keyphrase, nuclear power generation, sits at the heart of new projections for South Korea’s power system through 2035.. With the country operating like an “energy island” and lacking cross-border interconnections. policymakers have limited options when domestic supply must meet rising demand.. In that context, maintaining dependable, low-carbon electricity becomes a national security issue as much as an environmental one.
Misryoum reports that forecasts for South Korea’s nuclear output put generation at about 219.2 TWh by 2035.. The plan rests on both expanding reactor capacity and squeezing more operating value from the existing fleet.. Nuclear capacity is expected to rise from roughly 25.6 GW in 2025 to around 29.8 GW by 2035—supported by new reactor construction. lifetime extensions. and high utilization across current plants.. For a grid with limited ways to import backup electricity, that kind of baseload reliability matters.
The policy direction behind this trajectory has been reinforced after a major shift in 2022. when South Korea reordered its long-term approach to nuclear energy.. Misryoum notes that the 11th Basic Plan for Long-Term Electricity Supply and Demand positions nuclear power as both a low-carbon resource and an energy-security asset.. In practical terms. that means continuing large-scale reactor projects. including units that had faced suspension previously. while also laying groundwork for future technologies such as small modular reactors (SMRs).. The message is straightforward: nuclear energy is being treated as infrastructure, not just a component of the energy mix.
A key feature of the current moment is that nuclear strategy is no longer being debated in theory.. Misryoum points to a period of policy uncertainty around the program. followed by a clearer continuation signal under the current administration.. Surveys cited in the reporting suggest broad public support for expanding nuclear power. giving decision-makers room to proceed with construction under the basic plan.. That political backing is significant because reactor schedules can be derailed by policy reversals—and because nuclear projects typically require long timelines and sustained regulatory certainty.
There is also a global dimension.. South Korean nuclear companies are expanding their international presence through partnerships and agreements across Europe. the Middle East. and the United States. including reactor development and SMR collaboration.. Misryoum highlights the emergence of export-oriented projects as an extension of domestic strategy. positioning South Korea not only as a country expanding nuclear at home. but as a potential technology supplier abroad.. In the background is an industry race: whoever can deliver credible reactor timelines, supply-chain reliability, and financing structures gains leverage.
Why nuclear stays central in an “energy island” grid
Misryoum also describes a “dual-track transition” for the power system: renewables are expanding. while nuclear is being reinforced to maintain stability.. Solar PV and offshore wind are projected to grow substantially by 2035. with solar rising from about 33.8 GW in 2025 to around 75.6 GW. and offshore wind moving from roughly 0.3 GW to about 28.7 GW.. That growth is likely to increase the need for flexibility and grid upgrades.. The more variable generation enters the system. the more value dispatchable baseload resources can provide—especially during high demand or periods of weaker wind and sun.
Fossil backup. flexibility. and the cost of imports
This matters because fuel imports are tied to global price swings and geopolitical risk.. A system that leans on imported coal and gas may reduce carbon intensity over time, but it still faces volatility.. Nuclear’s appeal here is partly economic and partly strategic: once built. nuclear fuel supply tends to be more shielded from day-to-day market shocks than large volumes of imported fossil fuels.. The trade-off is that nuclear requires massive up-front planning. safety oversight. and long-term operations—areas where stability of policy and execution becomes crucial.
SMRs and nuclear-powered industry: a new demand narrative
At the same time. South Korea is reportedly deepening cooperation under frameworks for nuclear collaboration. and continuing participation in overseas reactor projects.. Misryoum’s reporting frames this as a shift toward integrating nuclear energy into future industrial competitiveness and export markets.. The underlying logic is clear: if nuclear becomes a pillar of national energy security. it can also become a platform for technology leadership—provided reactor projects stay on schedule and quality standards are maintained.
For readers watching the science and technology landscape. the most practical takeaway is that South Korea’s nuclear ambitions are being matched with a broader system overhaul: renewables growth. grid reinforcement. and flexible backup planning.. Nuclear power generation is not being treated as a standalone solution; it’s being positioned as the stabilizing backbone while other parts of the energy system transform.