The main principles of the agreement:

• A commitment by both parties to extend the operation of Doel 4 and Tihange 3 by 10 years, for an estimated investment of €1.6 billion to €2 billion, and to do everything possible to restart the plants by November 2025;
• The creation of a legal structure for the two extended nuclear power plants, owned equally by the Belgian state and ENGIE;
• The economic model for the extension, with a balanced sharing of risks, in particular through a Contract for Difference mechanism for the remuneration of electricity production. The strike price will be based on the actual cost of the extension. This cost is not yet known, but will be estimated based on the nuclear safety requirements set by the Federal Agency for Nuclear Control (FANC). An initial price will therefore be set in 2025, to be updated in 2028 based on the known amount of the final cost of the extension, to cover the period to 2035;
• The establishment of a lump sum for future costs related to the treatment of nuclear waste, covering all ENGIE nuclear facilities in Belgium, for a total amount of €15 billion, payable in two instalments according to waste categories;
• The removal of restrictions on Electrabel's non-European assets.

The final text also contains the technical and operational conditions for restarting the two units from November 2025, with full guarantees for nuclear safety.

The operation of these two reactors, together with ongoing decommissioning work on the other units, will maintain around 4,000 jobs (direct, indirect and induced) and has created 200 additional jobs.

On 14 March 2025, after receiving the green light from the European Commission, ENGIE and the Belgian government finalised the transaction. Since then, Doel 4 and Tihange 3 have belonged to BE-NUC, the 50/50 joint venture between the Belgian State and ENGIE.