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  • Nuclear Tracker

Nuclear Availability and Production Forecast

French nuclear monitoring is crucial to understanding the behaviour of energy markets in Europe. This is why our “Nuclear Tracker”, developed by the experts at Haya Energy Solutions, monitors the availability of the French nuclear fleet in real time. We monitor both the availability and production of individual nuclear plants and compare them against Haya Energy Solutions forecast of production.

In France, nuclear energy accounts for almost 70% of the energy mix. However, the nuclear fleet faces a number of challenges that reduce its output, and this unavailability has a direct impact on the markets.

The “Nuclear Tracker” tool is valuable for analysing nuclear availability and production forecasting, which is essential for predicting and understanding European electricity market reactions.

Nuclear tracker

Availability of the French nuclear fleet

Current French nuclear availability as of 28 September 2026 is around 35 GW, down from roughly 43 GW in mid-September and about 10 GW below the previous-month outlook for late September. Nuclear production has also fallen toward 25 GWh/h. EDF reported 26.2 TWh of French nuclear production in August, bringing the 2026 total to 245.9 TWh, or 5.9 TWh above the same point in 2025.

The late-September decline mainly reflects a concentration of planned outages. Among the latest units taken offline are Flamanville 1, Gravelines 3, Nogent 1, Paluel 4 and Cattenom 3, alongside other ongoing outages including Flamanville 3. EDF confirms that Gravelines 3 entered a planned partial inspection on 18 September. In addition, hydrological conditions on the Rhine and Rhône are not expected to improve materially, leaving nuclear output exposed to persistent cooling-water constraints.

Overall, The key point is the pace of the October recovery: timely restarts would restore availability quickly, while outage extensions would keep the French system tighter than expected ahead of winter.

 

Nuclear Production

We state the total realized production in France up to the current date, along with our forecasted production for the remaining months of the year. This provides a clear picture of overall nuclear output, helping users understand how actual performance compares to expected trends, taking into account planned maintenance, seasonal demand, and historical patterns.

Nuclear trends

We analyze trends in nuclear power availability and production, based on historical data, current plant statuses, and upcoming maintenance schedules. These trends help contextualize current performance and support projections for future supply conditions, especially during periods of high demand or stress on the grid.

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Biography

Diego is a Consultant at Haya Energy Solutions. He has 1 year of experience specializing in developing models for energy price forecasting, energy availability and production, and battery optimization.

Diego obtained a bachelor’s in Science in Political Economy from the King’s College London, and later a dual Master’s in Management and Computer Science from the IE University of Madrid.

Diego Marroquín

Consultant

Diego Marroquin - Consultant | Haya Energy Solutions
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Biography

Céline is the Head of Business Development and Administration at Haya Energy Solutions. She plays a key role in driving the company’s growth by expanding its market presence, strengthening brand positioning at the European level and implementing strategic initiatives. She also manages the company’s administrative operations, ensuring efficient financial management, including accounting and budget oversight.

She is also a Consultant at Haya Energy Solutions, specialising in the optimisation of energy procurement through the analysis of market trends and regulatory developments. She also provides strategic guidance to identify opportunities and tailor solutions to the specific needs of each client.

Céline holds a degree in Philology from the Sorbonne University and holds a master’s in Project Management and Cultural Tourism from the University of Clermont-Ferrand.

Céline Haya Sauvage

Head of Business Development and Administration

Céline Haya Sauvage | Haya Energy Solutions
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“Decarbonization of the Energy and Transport sectors is arguably today’s main economic driver for the industry.”

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His career started in civil engineering as a Project Manager in France, Martinique and Australia. Afterwards, he became the General Manager of a subsidiary in Venezuela. In 1992, he established Dalkia in Germany (district heating, cogeneration, and partnerships) and represented Véolia in Thailand. In 2000, he opened the commercial office of Endesa in France to take advantage of the liberalized retail market. From 2006, as a development Manager at Endesa France, he led Endesa’s plan for Combined Cycle generation in France and developed the wind and PV portfolio of Snet at the same time. 

Philippe worked for 3 years at E.ON’s headquarters coordinating the company´s activities in France. He was strongly involved in the French hydro concession renewal project. As a Senior Vice President – Project Director at Solvay Energy Services from April 2012 to February 2014 he was in charge of the H2/Power to gas and European direct market access deployment projects. Philippe has been an HES expert since 2014.

Philippe holds engineering degrees both from the Ecole Polytechnique and the Ecole Nationale des Ponts & Chaussées (France) and has a combined experience of more than 25 years in energy and infrastructure. In addition to English, Mr. Boulanger is fluent in French, German & Spanish.

Philippe Boulanger

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Antonio is the founder and President of Haya Energy Solutions, a specialized consulting firm focused on the energy sector, which has developed M&A projects in renewable and conventional power generation, cogeneration, district heating, gas and power retail, energy procurement and power optimization in France, Spain, Portugal, Germany and UK.

Prior to this, Antonio was CEO of KKR’s CELEST Power in France (2x410MW CCGT). He was also CEO of Endesa France and General Secretary, Strategy & Corporate Development Director at E.ON France. Formerly, he held different positions at Endesa, including Responsible for M&A at Endesa Europe and Regulation Specialist at Endesa Distribution.

Antonio holds an MBA from the University of Deusto and a degree in Industrial Engineering from the Higher Technical School of Engineering of the University of Seville.

Antonio Haya

President

Antonio Haya - President | Haya Energy Solutions
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