Belgium — Nuclear Fleet Overview

Operating Reactors (database): 1 tracked in platform Total Tracked Capacity: see fleet summary Under Construction (database): 0 Planned: 0 Regulatory Body: FANC/AFCN (Federal Agency for Nuclear Control)

Fleet Summary

Belgium has a well-established civilian nuclear power sector, with its first commercial reactor coming online in 1974. The country currently operates 7 pressurized water reactors (PWRs) across two nuclear power plants, Doel and Tihange, with a total net capacity of approximately 5.9 GWe, providing around 50% of the nation’s electricity in recent years. While the fleet has been a critical energy source, Belgium has faced policy shifts towards phasing out nuclear power by 2025, though extensions for some reactors are under discussion due to energy security concerns. The trajectory remains uncertain as the country balances decarbonization goals with renewable energy expansion.

Policy & Outlook

Belgium’s nuclear policy has been shaped by a 2003 law mandating a phase-out of nuclear power by 2025, reflecting political and public concerns over safety and waste management. However, in 2022, the government agreed to extend the operation of Doel 4 and Tihange 3 by 10 years beyond 2025 to ensure energy stability amid global supply challenges, with negotiations ongoing with operator ENGIE. There is growing interest in small modular reactors (SMRs) as a potential future option, with research and feasibility studies supported by institutions like SCK CEN. The policy outlook remains fluid, with nuclear’s role contingent on renewable energy progress and regional energy cooperation.

Key Sites

• Doel Nuclear Power Plant: Located near Antwerp, Doel hosts 4 PWR units with a combined capacity of about 2.9 GWe, operational since 1974-1985, though Doel 1 and 2 are slated for shutdown by 2025 unless extensions are confirmed.
• Tihange Nuclear Power Plant: Situated in Huy, Tihange operates 3 PWR units with a total capacity of around 3.0 GWe, active since 1975-1985, with Tihange 3 targeted for a life extension to 2035.
• SCK CEN (BR2 Reactor): Based in Mol, SCK CEN operates the BR2 research reactor, a tank-type facility critical for medical isotope production and nuclear research, remaining operational as a key scientific asset.

Historical Context

Belgium’s nuclear journey began in the 1950s with research initiatives at SCK CEN, culminating in the commissioning of its first commercial reactor, Doel 1, in 1974. The country rapidly expanded its nuclear fleet during the 1970s and 1980s to secure energy independence post-oil crises, achieving a peak reliance on nuclear for over 60% of electricity. A notable incident occurred in 2012 when micro-cracks were detected in reactor vessels at Doel 3 and Tihange 2, leading to temporary shutdowns and heightened safety scrutiny. Despite no major accidents, these events fueled public and regional concerns, influencing the ongoing phase-out debate.

Operating Reactors (Platform Database)

Reactor	Site	Type	Capacity (MWe)	Operator	Commercial Operation
BR2	—	Tank	—	SCK CEN	—

Under Construction (Platform Database)

None in database.

Sources

• IAEA PRIS — Belgium — IAEA Power Reactor Information System
• WNA Country Profile — World Nuclear Association
• FANC/AFCN (Federal Agency for Nuclear Control) — National nuclear regulator

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Enriched by Grok · Second Atomic Age Nuclear Wiki · 2026-05-10