Belgium's Nuclear Reversal: 8 Key Developments on the Path to Nationalization

In a dramatic policy shift, Belgium has abandoned its decades-long plan to phase out nuclear power. Prime Minister Bart De Wever announced that the country will halt decommissioning of its reactors and instead pursue nationalization. This move, driven by energy security concerns and a desire to reduce fossil fuel dependence, marks a turning point in Belgian energy policy. Here are the eight most critical things you need to know about this development, from the deal with operator ENGIE to the broader context of Belgium's energy mix.

1. Belgium Officially Ends Nuclear Phase-Out

Belgium's government, under Prime Minister Bart De Wever, has formally stopped the decommissioning of its nuclear power plants. This decision reverses a phase-out law passed in 2003 that aimed to shut all reactors by 2025. The new policy prioritizes safe, affordable, and sustainable energy, as De Wever stated on X. It also aims to reduce dependence on fossil fuel imports and gain greater control over domestic energy supply. The announcement came on April 30, 2026, signaling a major shift in the country's energy strategy.

2. Nationalization Negotiations with ENGIE Underway

The Belgian government will enter exclusive negotiations with French utility ENGIE to nationalize the country's nuclear assets. De Wever confirmed that the talks would cover the potential acquisition of the entire nuclear fleet, including all reactors, personnel, subsidiaries, and associated liabilities. ENGIE has signed a letter of intent to begin these exclusive discussions, indicating both sides are serious about reaching a deal. The move effectively brings Belgium's nuclear infrastructure under state control, a significant step given the reactors' strategic importance.

3. What the ENGIE Deal Covers

According to an ENGIE press release, the acquisition would include all seven reactors (two sites: Doel and Tihange), the associated workforce, all nuclear subsidiaries, and every related asset and liability. Crucially, this encompasses decommissioning and dismantling obligations, meaning the state takes full responsibility for future waste management and plant retirement. This comprehensive package ensures Belgium gains complete operational control and long-term stewardship of its nuclear capacity.

4. Timeline for a Basic Agreement

Both parties aim to reach a basic agreement by October 2026. The negotiations are exclusive, giving ENGIE and the Belgian government a clear window to finalize terms. After that, further details on the transaction's structure, valuation, and transition plan would be disclosed. This timeline shows the urgency behind the policy shift, as Belgium moves quickly to secure its nuclear future amid ongoing energy challenges.

5. Belgium's Long-Standing Nuclear Debate

Belgium first voted to phase out nuclear power in 2003, with a planned 2025 closure. However, political debate and energy security concerns repeatedly delayed the deadline. In 2022, the government extended the life of two reactors, and last year the parliament voted by a large majority to end the nuclear phase-out entirely. This latest decision by De Wever's government cements that reversal, ending nearly two decades of uncertainty over the fate of the aging reactors.

6. Current State of Belgium's Reactors

Belgium has seven nuclear reactors at two locations: Doel (near Antwerp) and Tihange (near Huy). However, three reactors have already been taken off the grid. The remaining four are still operational, but their age and maintenance costs have been subjects of debate. The nationalization deal is expected to address these concerns by ensuring continued operation and investment, while also planning for eventual decommissioning under state control.

7. New Nuclear Builds on the Horizon

The government doesn't just want to keep existing reactors running—it also plans to build new nuclear power plants. This signals a long-term commitment to atomic energy as a cornerstone of Belgium's electricity grid. New builds could incorporate advanced reactor designs, helping the country meet future demand while lowering carbon emissions. This is a stark departure from the phase-out policy and aligns with broader European trends of reconsidering nuclear power for climate and energy independence goals.

8. Why This Matters for Belgium's Energy Mix

Belgium is heavily dependent on natural gas imports to cover its electricity needs, having struggled to significantly expand renewable energy generation like wind and solar. The country's energy security has been fragile, especially after geopolitical tensions disrupted gas supplies. By securing nuclear power—which provides stable, low-carbon baseload electricity—Belgium reduces its exposure to volatile fossil fuel markets (nationalization negotiations) and gains more control over its supply. This shift may also serve as a model for other European nations reconsidering nuclear as a clean energy option.

Belgium's decision to halt nuclear decommissioning and pursue nationalization is a bold move that redefines its energy policy for decades to come. With negotiations underway, new builds planned, and a clear focus on reducing fossil fuel imports, the country is betting on atomic power to deliver a secure and sustainable energy future. As the deal with ENGIE progresses, all eyes will be on how Belgium manages this transition and whether it can overcome the technical, financial, and political hurdles ahead.