VNU mechanism

The VNU entered force on 1 January 2026, concluding the 14-year ARENH era of fixed-price subsidised nuclear access. Industrial users WHO relied on €42/MWh ARENH allocations faced an immediate step-change, moving to CRE's €65.90/MWh reference rate. Through the first half of 2026, the VNU's competitive significance became clearest during periods of extreme Franco-German power price divergence: on 3 June, France cleared €8.96/MWh while Germany cleared €102.64, meaning French industrials on VNU-linked tariffs faced power costs roughly 11 times cheaper than their German equivalents.

CRE confirmed in June 2026 that the VNU windfall levy will not trigger in 2026: EDF nuclear revenues remained near €65-70/MWh throughout H1, below the €78/MWh threshold. All positive-spark upside on EDF's portfolio stays inside its P&L, and no consumer redistribution occurs this year. On 22 June, France cleared €106.80 against Germany's €124.09 with the VNU dormant; the structural cost floor for French industrials is set entirely by nuclear output, not by redistribution. Looking ahead, Flamanville-3's scheduled September 2026 overhaul (removing ~1.6 GW for approximately one year) narrows the nuclear surplus that underpins French industrial competitiveness through the heating season. The VNU is now the primary lens for assessing whether EDF's fleet economics improve enough to trigger the levy in 2027.

The Versement Nucléaire Universel (VNU) is France's 2026 mechanism for setting the reference price of regulated nuclear electricity sales. It replaced the ARENH (Accès Régulé à l'Énergie Nucléaire Historique) scheme, which had fixed regulated access at €42/MWh under a 100 TWh annual CAP. Under the VNU, the CRE estimates a dynamic reference price each year reflecting EDF's actual long-run costs: for 2026 that figure is €65.90/MWh. Large industrial consumers and electricity suppliers may access French nuclear production at this regulated price rather than the Day-ahead market rate, giving French industry a structural electricity cost advantage when day-ahead prices are high.

The VNU also includes a windfall levy provision: when EDF nuclear revenues exceed a trigger threshold, the surplus is redistributed to consumers via CRE. The trigger is set at €78/MWh; below that level no redistribution occurs and all margin stays inside EDF.