Hugin & Munin Journal

The energy transition is moving quickly, but not cleanly. Wind and solar are expanding, their costs have fallen, and electricity grids are being reorganised around variable generation. At the same time, transmission, storage, firm capacity, industrial demand, permitting and system coordination are becoming harder constraints. The argument is no longer only about which technologies can produce low-carbon electricity. It is about which combinations can be built, financed and operated as a dependable system. Nuclear power keeps returning to that debate because it offers firm, low-carbon generation while bringing problems of its own: high capital costs, long construction schedules, waste, political resistance and demands on public trust. In an earlier essay on the energy transition as a system problem , I argued that generation technologies should be judged by the roles they perform together rather than by a contest of preferences. Breeder reactors push the same argument into a less comf...

In March 2026, European Commission President Ursula von der Leyen called Europe’s reduction of nuclear energy a “strategic mistake” . It was the sort of statement almost guaranteed to provoke an immediate answer. To some, it sounded like overdue realism. To others, it looked like a convenient attempt to rewrite decades of political choices. But the question is more difficult than either response suggests. Europe did not pursue one nuclear policy, and “retreating from nuclear power” can describe several very different decisions: closing an ageing reactor, refusing a lifetime extension, abandoning a new project, or rejecting the technology entirely. The strongest answer is therefore narrower. Closing safe existing reactors before firm low-carbon replacements, stronger grids and sufficient flexibility were ready was often a strategic mistake. That does not mean every reactor should have remained open, or that every proposed nuclear plant represents good value. It means energy systems ...