Automatic shutdown of the Flamanville EPR: Reactor checks in progress

The EPR reactor at Flamanville is experiencing an automatic shutdown after its first nuclear fission. EDF teams are carrying out technical checks to identify the cause and restart the divergence process.

Share:

EPR de Flamanville

The Flamanville EPR is experiencing an automatic shutdown following its first nuclear fission reaction.
This event occurred just as the reactor was beginning its commissioning process, a delicate phase marked by a gradual build-up of power.
According to EDF, this shutdown is the result of a safety system designed to prevent any malfunction during this ramp-up.
Technical checks and in-depth analyses are currently underway to determine the precise reasons for the shutdown, and to restart the reactor.
Safety protocols in force on this type of reactor require automatic shutdowns as soon as potential anomalies are detected.
These procedures are commonplace in the nuclear industry, where every stage of the commissioning process is strictly regulated to guarantee plant safety.
Initial information indicates that an inappropriate plant configuration may be the cause of the shutdown.
EDF is following procedures to make the necessary adjustments and restart the reactor.

Technical Challenges and Risk Management

Commissioning the EPR is a complex process, involving multiple tests and checks.
Any incidents or unplanned shutdowns, such as the one at Flamanville, are part of normal start-up operations.
Nicolas Goldberg, an expert at Colombus Consulting, points out that such shutdowns are common in new nuclear reactor start-ups, as demonstrated by the experience of the Olkiluoto EPR in Finland.
The latter had to cope with a number of technical adjustments, such as replacing faulty hydraulic pumps, before becoming operational.
These challenges, though expected, call for rigorous risk management and meticulous planning of maintenance operations.
The safety and reliability of nuclear installations are top priorities, and each shutdown provides an opportunity to improve reactor performance and safety.
EDF’s technical teams are currently mobilized to analyze the data and resume power ramp-up under the best possible conditions.

Cost Challenges and Backlogs

The Flamanville EPR is an ambitious project, but it has also been marked by major delays and significant cost increases.
The project, originally scheduled to be operational in 2012, is now 12 years behind schedule.
The total cost of the project now stands at 13.2 billion euros, four times the original budget.
These cost overruns reflect the many technical and regulatory challenges the reactor has faced.
EDF recently passed a crucial milestone with the first fission reaction, authorized by the French Nuclear Safety Authority (ASN).
The process of ramping up the reactor’s power output is continuing in stages.
EDF expects to reach 25% power by late autumn, when the reactor will be ready for connection to the national grid.
However, unforeseen technical adjustments, such as the recent automatic shutdown, may still affect this schedule.

Next step: Grid connection

Grid connection is a key milestone for the Flamanville EPR.
Once this stage has been reached, the reactor will gradually begin to supply the grid with increasing capacity.
This ramp-up will take place in stages, with each power level requiring further validation to ensure stable, safe operation.
The aim is to guarantee seamless integration into the national energy grid.
The Flamanville EPR reactor, with a planned output of 1,600 MW, will become the most powerful reactor in France.
It is designed to power around three million homes.
The road to full capacity continues to be punctuated by technical challenges and control procedures, but each step taken brings the EPR a little closer to full commissioning.

Bahrain has concluded a civil nuclear agreement with the United States and formalised a commitment of $17bn in public investments in the US market, further strengthening bilateral cooperation.
Kairos Power has installed the vessel for its third test prototype in Oak Ridge, aiming to validate manufacturing methods for its future Hermes reactor supported by the US Department of Energy.
London and Prague formalise a strategic partnership to develop the nuclear sector, focusing on small modular reactors and industrial cooperation on supply chains.
Experts have broadly approved France’s Cigéo deep nuclear waste repository project, highlighting technical uncertainties that demand stronger guarantees for long-term safety.
Uzbekistan advances its nuclear project by signing a protocol with Hungary for the supply and local assembly of dry cooling systems, expanding its industrial partnerships in the region.
Polskie Elektrownie Jądrowe is asking the European Commission to review its $49bn investment to build Poland’s first nuclear power plant, a step required under the Euratom Treaty before any construction permit can be issued.
The International Atomic Energy Agency mission completed on July 11 warns that the National Nuclear Safety Administration must hire staff to oversee a fleet of 59 reactors in operation and 32 more under construction.
Energoatom signed strategic agreements with Westinghouse and Holtec at the Ukraine Recovery Conference, aiming to establish nuclear fuel production and small modular reactor capabilities in the country.
Tehran agrees to reopen its nuclear facilities to the IAEA, aiming to resume negotiations with Washington, while Moscow pushes for a “zero enrichment” agreement without getting involved in supervision.
TerraPower has selected three new American suppliers for its advanced Natrium nuclear reactor, confirming progress on the project located in Kemmerer, Wyoming, intended to replace a retiring coal-fired power plant.
Energy Exploration Technologies acquires Daytona Lithium, an Australian subsidiary of Pantera Lithium, for AUD40mn ($27mn), bringing its strategic lithium basin footprint in Smackover, USA to nearly 50,000 acres.
The Canadian Nuclear Safety Commission has identified no major barriers to licensing the ARC-100 reactor, announces ARC Clean Technology.
SE Ignalina, the Lithuanian nuclear operator, has signed a memorandum of understanding with French firm Newcleo to explore the integration of small modular reactors (SMRs) using lead-cooled fast reactor (LFR) technology in Lithuania.
Egyptian President Abdel Fattah al-Sisi oversaw the signing of new agreements for the construction of the El Dabaa nuclear power plant, thus strengthening the strategic cooperation between Egypt and Russia.
Vistra Corp receives green light to extend Perry nuclear plant operations in Ohio by 20 years, securing regional electricity supply until 2046 and ensuring operational continuity for all its nuclear reactors in the United States.
EDF will hold a 12.5% stake in the Sizewell C nuclear project in the UK, a €1.3 billion investment announced during Emmanuel Macron’s official visit to London, confirming the strategic nuclear energy alignment between the two countries.
The French Cigéo project, designed to bury the most hazardous radioactive waste deep underground, obtains a crucial technical validation before its final authorization, expected by the end of 2027.
EDF confirms the continuation of its industrial project in Fessenheim for recycling very low-level radioactive metals, a first in France requiring specific regulatory authorizations, following a public debate concluded last February.
NANO Nuclear Energy Inc. formalizes its collaboration with UrAmerica Ltd. to strengthen Argentina’s uranium supply, aiming to secure future nuclear fuel supply chains for the U.S. market.
American companies SHINE Technologies and Standard Nuclear partner to recycle uranium and plutonium, supplying advanced fuel to the nuclear reactor sector and enhancing the national energy security of the United States.