Nuclear Energy and Greece’s Energy Transition

The global energy system is entering a new phase of transition in which clean, reliable and scalable energy sources are becoming central to economic competitiveness and energy security. Nuclear energy is re-emerging globally as countries seek stable sources of low carbon electricity.

Recent technological developments, particularly the emergence of Small Modular Reactors (SMRs), are expanding the potential applications of nuclear energy. These new reactor designs are smaller, modular and easier to deploy than traditional nuclear power plants while maintaining high levels of safety and reliability.

This report examines the technological, economic and strategic factors behind the renewed global interest in nuclear energy and evaluates the potential role of nuclear power in Greece’s long term energy strategy.

Technology Overview

The recent revival of nuclear energy is closely linked to the development of Small Modular Reactors. SMRs are advanced nuclear reactors with a power output typically up to 300 megawatts per unit and are designed to be manufactured in factories and assembled on site.

Their modular design allows for incremental deployment, enabling countries to add capacity gradually as demand grows. A wide range of reactor designs is currently being developed worldwide including water cooled reactors, high temperature gas cooled reactors, molten salt reactors and microreactors.

These technologies aim to improve construction efficiency, operational flexibility and safety while reducing overall deployment costs.

Technological Advantages

SMRs introduce several advantages compared with traditional large scale nuclear power plants.

Their modular construction allows for shorter deployment timelines and lower initial capital requirements. Smaller reactor units also allow energy systems to scale capacity gradually rather than relying on single large projects.

Advanced reactor designs incorporate passive safety systems that rely on natural physical processes such as gravity and natural circulation to cool the reactor without human intervention. Many designs also use advanced fuels and sealed cores that can operate for extended periods without refueling.

Together these characteristics improve the economic viability, operational flexibility and safety profile of nuclear energy.

Opportunity for Greece

Nuclear energy could support several strategic objectives for Greece’s energy system. As electricity demand increases due to electrification and economic growth, nuclear power could provide stable low carbon electricity that complements renewable energy sources.

SMRs could also support industrial decarbonization, providing high temperature process heat for sectors such as cement, steel and petrochemicals. In addition, nuclear energy could support port electrification, desalination and energy supply for remote regions or islands.

By diversifying the country’s energy mix, nuclear power could strengthen energy security and reduce dependence on imported fossil fuels.