Romania's €3.2 Billion Bet Runs on a 245,000-Hour Clock

Analysis as of 5 August 2026.

On 15 July 2026 the board of the European Investment Bank approved €800 million for the life extension of Cernavodă Unit 1. Set beside the bank's own figure of roughly €3,200 million for the whole undertaking, and beside the €540 million that a syndicate led by J.P. Morgan SE signed in September 2025 for the preparatory phase, the approval brings the sum covered to about a quarter of the disclosed cost picture. What it cannot buy is time, because time at Cernavodă is not measured in years.

The unit, a CANDU 6 in commercial service since 1996, holds a licence defined by cumulative output: 245,000 hours at rated power, raised from an original 210,000 on the strength of studies accepted by the Romanian regulator. Nuclearelectrica plans to disconnect the reactor on 30 September 2027, the day that ceiling is expected to be reached, and to reconnect it in 2030 after a retubing campaign covering 380 fuel channels and 760 feeder pipes. The counter, however, only runs when the plant does. On 27 July 2026 Unit 1 came off the grid because the Danube had fallen to an unprecedented low in a severe drought — a reminder that every idle day pushes the shutdown date outward without making the works behind it any readier.

The money itself is not one number escalating but three figures drawn on different scopes and cost bases. A feasibility baseline of about €1.85 billion, adopted with the final investment decision of 23 February 2022, excluded financing costs and inflation. The main EPC contract signed in December 2024 with a consortium of Candu Energy, Ansaldo Nucleare, the Canadian Commercial Corporation and KHNP carried an estimated €1.9 billion. The €3.2 billion notified to Brussels in January 2026 is the all-in envelope — and it is precisely that envelope the European Commission put under an in-depth State aid investigation on 16 April 2026, case SA.117704, questioning whether a €600 million grant, state guarantees, a thirty-year two-way contract for difference and a regulatory-change shield amount, taken together, to more protection than the 706-megawatt unit needs.

The industrial base is as concentrated as the finance is layered. Canadian disclosures put the consortium contract at $2.85 billion, with $937 million attributed to AtkinsRéalis, whose cumulative Cernavodă workload had reached almost $1.9 billion by the end of 2024; the firm counted 250 specialists on the programme, rising toward 340. The one finished precedent on a comparable machine, Argentina's Embalse, mobilised more than 3,700 workers with only around thirty foreign advisers on the channel and feeder work — evidence that a domestic workforce can carry a CANDU outage, if it is trained in time. Meanwhile the waste path is being poured in concrete: the first continuous placement of about 3,470 cubic metres went in on 18 May 2026 at the interim storage facility built into the shell once meant for a fifth reactor, and the dry spent-fuel yard must grow from 12 built modules toward an eventual 37.

What hangs on all this is roughly a tenth of Romania's electricity — some 5 million MWh a year from a fleet whose two units delivered 19.83% of national supply at the end of 2024 — from a company 82.4981% state-owned, which Fitch moved in December 2025 to BBB- with a negative outlook that mirrors the sovereign rating.

So the questions that will decide the decade are already visible, and none is settled: whether the Commission clears the support package, and in what shape, before the outage opens; whether the EIB facility moves from board approval through signature and drawdown in step with procurement cash calls; whether Romania can repeat the Embalse pattern and staff the retubing largely from home; whether the waste store and the expanded fuel yard are physically finished before the first pressure tube comes out; and what a second or third drought summer on the Danube does to a schedule anchored to an hour-counter that only moves when the river allows the reactor to run.