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Low Danube Forces Hungary and Romania to Halt Nuclear Reactors

Loss of river cooling has removed thousands of megawatts, prompting emergency demand cuts, costly imports, warnings the strain may persist for weeks.

Overview

  • Hungary’s Paks plant was brought down to minimal output and then fully stopped, a move that left the country with about a 2,000 megawatt gap and triggered government orders for industry to cut usage; the shutdown was confirmed on Sunday.
  • Romania has taken both Cernavodă reactors offline and declared a month‑long state of emergency while funding short‑term water diversions and negotiating electricity imports with neighbors.
  • Governments have activated emergency measures that include compulsory ready‑to‑enforce cuts for large consumers, targeted reductions in transport and public services, and appeals to households to shift or cut evening electricity use.
  • The immediate shortfall comes as heat is raising air‑conditioning demand and riverborne cooling and hydropower output are already reduced, forcing reliance on expensive spot‑market purchases and cross‑border imports.
  • Energy and water officials say the outages show a wider vulnerability: large rivers supply cooling water and transport for fuel, so prolonged droughts can trigger multi‑sector shocks that may require rethinking plant siting and cooling strategies.