Belgium Reopens Talks with Engie for Further Nuclear Reactor Lifespan Extensions

Belgium Explores Extended Nuclear Operations

Belgium has re-entered discussions with French energy company Engie concerning a potential further extension of the operational lifespan of its Doel 4 and Tihange 3 nuclear power plants. These renewed talks aim to prolong the reactors' operations by as much as twenty years beyond the initial ten-year extension already agreed upon, reflecting a strategic pivot in Belgium's energy policy.

The Belgian government, led by Prime Minister Bart De Wever, and Energy Minister Mathieu Bihet, are actively involved in these discussions, seeking to secure cheaper nuclear energy for industrial use and bolster the nation's overall power generation capacity.

Shifting Energy Landscape and Previous Agreements

Historically, Belgium had a 2003 law mandating a complete phase-out of nuclear energy by 2025. However, geopolitical events, particularly the energy crisis and the war in Ukraine, prompted a re-evaluation of this policy. In March 2022, the Belgian federal government decided to postpone the nuclear phase-out by a decade, allowing Doel 4 and Tihange 3 to operate until 2035 to enhance energy security.

A comprehensive agreement for this initial ten-year extension was announced in January 2022, finalized in December 2023, and received approval from the European Commission in February 2025. This deal included a commitment to restart Doel 4 and Tihange 3 by November 2026. Key aspects of this agreement involved:

• Equal ownership of Doel 4 and Tihange 3 by the Belgian state and Engie.
• Transfer of future nuclear waste liabilities from Engie to the Belgian state, with Engie paying a fixed amount of €15 billion.
• An estimated investment of €1.6 billion to €2 billion for the 10-year extension.

New Ambitions and Future Outlook

A significant development occurred in May 2025 when the Belgian Parliament voted to reverse the complete nuclear phase-out, allowing for the construction of new nuclear capacity and extending the operation of Doel 4 and Tihange 3 until 2045. This parliamentary decision forms the basis for the current discussions with Engie for a longer extension period.

The new Belgian government has articulated an ambitious goal to double the country's nuclear capacity to 8 GW. While Engie has expressed concerns regarding the additional investments required for dismantling, the ongoing discussions suggest that a new agreement for further extensions remains a possibility. The government is also exploring the potential for other existing reactors to continue operations beyond their original decommissioning dates.