French nuclear curtailment flipped the France-Germany day-ahead spread on Sunday, with Chooz, Golfech and Bugey fully offline and eight reactors throttled. Gas moved the other way, as TTF round-tripped back above EUR 50 on renewed Strait of Hormuz shipping risk rather than European tightness. Storage and Norwegian supply absorbed the gas shock while carbon broke EUR 81.
Domestic French weather and Gulf shipping risk moved gas and power on separate clocks, squeezing carbon from both sides.
EDF took Chooz, Golfech and Bugey fully offline on Sunday as river-cooling limits bit, flipping French day-ahead power to roughly EUR 7/MWh above Germany for the first time in weeks.
FranceSaudi ArabiaEDF took three reactors, Chooz, Golfech and Bugey, fully offline on 12 July after river-cooling limits kicked in during the heat. That briefly flipped French power from cheaper than Germany's to about EUR 7/MWh dearer, before easing back to EUR 3/MWh cheaper by 13 July.
The swing shows how tightly French power prices are tied to river temperatures, not just demand. A regulatory exemption, not a grid fix, is what brings Bugey back online by 20 July.
TTF front-month firmed to EUR 50.50 on Monday, a 3.49% gain, on renewed Strait of Hormuz shipping risk rather than any European supply tightness.
TTF Gas settled near EUR 50 on 9 July, dipped to EUR 48.80 the next day, then climbed back to EUR 50.50 by 13 July, a 3.49% Monday gain. The moves tracked Gulf shipping-risk headlines around Qatar's export flows, not any change in Europe's own gas supply.
European storage stayed comfortable and Norwegian gas kept flowing throughout, so the price swings reflect Gulf-risk sentiment rather than a real shortage on the ground.
The EU December carbon allowance ran to about EUR 81.35 a tonne by Monday, its highest since February, stacking fresh cost onto gas-fired generation.
EUA carbon allowances broke EUR 81 a tonne for the first time since February, climbing from EUR 79.04 on 10 July to about EUR 81.35 by 13 July. The rally builds on a run that first cleared EUR 80 on 25 June.
Two forces are pushing carbon higher together: the EU's automatic supply-tightening mechanism and extra gas-fired power generation stepping in during the French nuclear curtailment.
German storage hit 43.94% and French 51.14% on Saturday as Norwegian export nominations recovered, absorbing the gas rally without physical strain.
German gas storage hit 43.94% on 11 July as net injection tripled to 723 GWh, while French storage reached 51.14% injecting at full available capacity. Norway's Gassco exit nominations recovered to 319.8 mcm/day after Equinor's Asgard field returned from maintenance.
The EU's mandatory storage-fill rule keeps injection going regardless of price, and Norway's rebound gave the system enough gas to absorb that week's TTF swings without drawing down existing stock.
Direction: sideways on the power leg, contingent to down on the gas leg. Bugey's cooling-water exemption expires 20 July 2026; ASN's renewal or refusal on that date is the specific trigger for whether the FR-DE flip recurs through late summer, alongside Chooz-2's reported 25 July restart. On gas, a confirmed Hormuz de-escalation, rather than a further tanker incident, would unwind the EUR 50-plus TTF premium quickly since storage above 43% in Germany and recovered Norwegian flow already show no physical tightness behind it; absent that, QatarEnergy's Ras Laffan force majeure running into August keeps a floor under TTF.
AI-assisted, human-edited under the editorial responsibility of Bannermedia Ltd. Reviewed by Ed Woodcock on 13 July 2026. Editorial standards.
