Wedoany.com Report-Jul. 12, Belgium’s Federal Agency for Nuclear Control (FANC) has authorized the restart of Tihange 3, a nuclear reactor unit at the Tihange power plant, following a maintenance outage that began on April 5. The extensive overhaul, known as a Long Term Operation (LTO) process, prepares the reactor for safe operation for an additional ten years, extending its service to 2035. The restart is expected to occur in the coming days.

The three-unit Tihange plant

The decision follows a comprehensive review by FANC and its technical subsidiary, Bel V, confirming that Tihange 3 meets safety requirements. Electrabel, the Belgian subsidiary of Engie, submitted an LTO file in December 2024, including safety studies and an action plan to enhance the reactor’s safety. FANC reviewed the plan in the first half of 2025, requesting additional studies, clarifications, and accelerated implementation of certain measures. The approved action plan includes completed tasks, such as testing and component replacements, with remaining measures to be finalized by September 2028 under FANC and Bel V oversight.

FANC stated: “In recent years, intensive consultations have already taken place between FANC and Electrabel, which means that the proposed action plan has already largely met the expectations of FANC.” This collaboration ensured the plan’s alignment with stringent safety standards.

The Tihange 3 restart is part of an agreement between the Belgian government and Electrabel, finalized in December 2024, to extend the operation of Tihange 3 and Doel 4, the country’s youngest reactors, until 2035. Doel 4, currently undergoing its LTO overhaul since June 30, is scheduled for restart by November 1, pending approval of its action plan and completed measures.

Belgium’s nuclear energy strategy has evolved significantly. A 2003 federal law initially mandated a phase-out of nuclear power, with closures planned for units like Doel 1, Doel 2, Tihange 1, Tihange 2, and Doel 3. However, amendments in 2013 and 2015 extended Doel 1’s operation, and in May 2025, parliament repealed the 2003 law, removing restrictions on new nuclear capacity. FANC has urged clarity on potential extensions beyond 2035 for Tihange 3 and Doel 4 to allow timely safety preparations.

The restart of Tihange 3 supports Belgium’s efforts to maintain a reliable energy supply while prioritizing safety and sustainability. Ongoing monitoring by FANC and Bel V ensures continued compliance with rigorous standards.