Luxembourg’s Nuclear Dilemma – Caught Between Principles and Practice

Luxembourg will not appeal a European court ruling that classifies nuclear power as a
“sustainable” investment, a decision that exposes the limits of its anti-nuclear crusade
and underscores Europe’s fractured energy landscape.

The General Court of the EU last week dismissed a legal challenge brought by Austria,
with Luxembourg as co-plaintiff, against the European Commission’s decision to include
nuclear and gas in its green taxonomy. The judges found the Commission acted within
its remit, citing nuclear “near-zero greenhouse gas emissions” and the absence of
sufficient low-carbon alternatives to guarantee Europe’s energy supply.

For Luxembourg, which has no nuclear plants and has long championed a renewable-
only path, the defeat marks the end of the road. Ministers had warned that taxonomy
amounts to “greenwashing” and undermined its credibility by legitimizing an energy
source burdened by unresolved waste and safety risks. Yet with the court siding
decisively with Brussels, officials concede that a further appeal to the EU’s top court
would be futile.

The setback is not about energy production, Luxembourg’s policy remains unchanged, but about financial classification. The Grand Duchy is a heavyweight in European green.
finance, with its banks and funds managing billions in sustainable assets. Those
institutions must now apply the EU’s definition of “green,” which means that, under
certain conditions, investments in nuclear projects qualify as sustainable. The result is a
dissonance, a national stance rooted in opposition to nuclear, and a financial sector
obliged to accommodate it.

Across the border, reactions diverge. France, which generates more than 60% of its
electricity from nuclear reactors, emerges as the ruling’s biggest beneficiary. Its
government has long argued that nuclear is indispensable for decarbonisation, and the
EU’s endorsement smooths the path for new investment in its reactor fleet.

Germany, by contrast, has just completed its nuclear phase-out and remains skeptical
of the taxonomy. The decision does not alter Berlin’s domestic policy, but it underscores
the widening gulf with Paris over how to achieve Europe’s climate goals.

Belgium, which has been phasing out nuclear but retains significant capacity, gains
legal certainty for its existing plants, including the Tihange facility near Luxembourg
border.

Luxembourg’s retreat from the courtroom highlights the political reality – Europe’s
definition of sustainability is increasingly pragmatic, reflecting energy security as much
as climate ambition. But for the Grand Duchy, the ruling leaves it caught between
principle and practice, its taxonomy reshaped by forces beyond its borders.