Nuclear: In Flamanville, the EPR farce continues

During a meeting of the local information commission on April 12, the Nuclear Safety Authority (ASN) assured that it could give the green light to the start-up of the reactor by the beginning of May. However, not all technical problems are resolved. And now a new one – of vibrations – appeared at the end of last year on the primary circuit. Revelations.

Blast, Thierry Gadault , 22 Apr 24

A few kilometers from the Flamanville nuclear power plant, Les Pieux (Manche) is typical of the many nuclear communities that we cross along the Rhône and Loire valleys: stone facades scrubbed with a toothbrush, paved sidewalks shiny as a new penny, innumerable municipal facilities that a town of some 3,500 inhabitants could never hope to afford, even in its wildest dreams, if it were not for the millions poured every year by EDF into the Department………………………..

Dialogue of the deaf in the basement

Behind the town hall, an old mansion which dominates the village, is the Pieux proximity center. In the basement of the building, which houses part of the municipal services, an auditorium with around fifty seats hosts the meetings of the Local Information Commission (CLI), a consultative body bringing together EDF, the Nuclear Safety Authority (ASN), local elected officials, the State and association representatives.

April 12, 2024, there was a crowd for the extraordinary meeting of the CLI. The menu was potentially copious: it was a question of taking stock of the EPR, before the ASN gave the green light to EDF to install the nuclear fuel in the vessel. While the independent authority was in full public consultation (it ended on April 17), an essential prerequisite for its decision-making, the associations had obtained this appointment in the form of a last-chance meeting, to try to derail the process. 

But neither the ASN representative, Gaëtan Lafforge, the head of the Caen division, nor that of EDF, Alain Morvan, the director of the Flamanville EPR project, had the intention of revealing the reality of the numerous problems which still affect the reactor. And it was a dialogue of the deaf that the participants engaged in.

On the ASN and EDF side, the speech can easily be summarized: officially, everything is in order and the objective is now to gradually bring the reactor to operate at full power, at the end of the year. The authority also specified that the green light will be given by the beginning of May. Alain Morvan, with slides reduced to the strict minimum, simply outlined the process of starting up the new reactor.

On April 12, questioned on this subject by Yannick Rousselet, nuclear safety consultant at Greenpeace, the ASN representative had the greatest difficulty in answering the question clearly. “I can’t tell you that there won’t be anything left, there could be possible deviations during the tests,” stammered Gaëtan Lafforge. This then led to a short lunar exchange with the anti-nuclear activist, which triggered laughter from the audience.

On the anti-nuclear activist side, the troops left after two hours with their questions. In particular, lo and behold, a new vibration problem on the primary circuit detected last year.

The information was given to Blast by Julien Collet, the deputy director general of ASN, during the authority’s annual press conference organized at the end of last January. The DGA then told us that EDF was in the process of investigating this umpteenth glitch on the EPR.

On April 12, questioned on this subject by Yannick Rousselet, nuclear safety consultant at Greenpeace, the ASN representative had the greatest difficulty in answering the question clearly. “I can’t tell you that there won’t be anything left, there could be possible deviations during the tests,” stammered Gaëtan Lafforge. This then led to a short lunar exchange with the anti-nuclear activist, which triggered laughter from the audience.

Strangely, Alain Morvan, who could have provided technical details, remained silent. And no one thought to give him the floor. Especially since the president of the CLI, perhaps impatient to go to lunch, hastened to close the session. Questioned by Blast after the meeting, the director of the EPR project, cornered by a member of EDF communications, refused to answer us.

Hardly any more luck with the Parisian communications department, a few moments later. “The vibrational issues have been dealt with and technical solutions put in place,” she simply responded in the usual wooden language. In short, move around, there is nothing to see.

Yes, but here it is: questioned by a journalist from Presse de la Manche, the local daily which covered the event, EDF gave another answer : “There is no new vibration subject,” said the electrician. to our colleague.  Um… we should know: has the subject been covered or does it not exist?

It’s not me, it’s him !

To try to see things clearly, Blast turned to the Institute of Radiation Protection and Nuclear Safety (IRSN), the public research establishment which provides technical advice to the ASN.

Perhaps concerned about its future – following the merger with the ASN imposed by the government and ratified by the National Assembly and the Senate – the establishment informed us through its press manager that the subject was not his responsibility. And to send us back to the ASN… 

Unfortunately, ASN did not answer our questions. As Martine Aubry, the mayor of Lille and former candidate defeated in the 2011 socialist primary, said about François Hollande, “when it’s vague, there’s a wolf…” 

The lid saga

This new problem… sorry “subject” vibration is therefore added to the numerous unresolved technical files that EDF has decided to leave as is, with the agreement of the ASN, to provide a response only after the commissioning of the reactor – it is unusual, we will agree. Starting obviously with the lid of the tank, weakened by a manufacturing defect (positive carbon segregation also present in the bottom of the tank). When the authority finally authorized the use of the tank and its lid in 2018, when it was no longer possible to exclude the risk of rupture but only to prevent it (which does not have the same meaning), she had asked EDF to change the cover no later than December 2024.

……………………………………..Questioned by activists to know why the company was not waiting for this new cover, Alain Morvan got confused in his explanations. He first suggested that it was not finished, and that it would therefore not be installed before the summer of 2025, before contradicting himself to finally assure that it would be delivered to the nuclear power plant at the end of the year…

In fact, the public group has nothing to do with it: in 2023, Framatome obtained from the ASN to postpone the replacement of the cover by one year, without giving any justification for such a postponement. According to the order issued by the authority last year, it must now be replaced during the first full inspection of the installation, after its start-up.

While it was possible to change this part in complete safety for the health of workers, if the new one had been installed before start-up, this postponement changes everything. The current cover will be irradiated and it will in fact become nuclear waste. In other words, an object that cannot be handled like that.

Apart from the fact that this unnecessarily exposes workers to taking doses during operations to replace it, this poses another problem. This question has not been resolved to date by EDF: that of the storage of this contaminated part, when it is removed. ASN asked the EDF group to construct a building for this purpose which would allow it to be stored safely on the power plant site. Which still doesn’t seem to be done…

Radioactivity, haphazardly

Emblematic, the tank cover file is not the only one which demonstrates EDF’s lack of consideration for nuclear employees, whether they are in-house agents or subcontracting employees. A second major project, also planned after the start-up of the reactor, will expose those involved to radioactive risks. Here again, this intervention could have been carried out in complete safety before the installation was started: the modification of the cooling system of the reactor auxiliary networks (RRI) and rescued raw water (SEC). Essential elements, particularly during reactor shutdown…………………………………………………………………………………………………………………….

Later, again

Still in the same logic, EDF has postponed the modification of the tank internals until later, more precisely the lower plenum which directs the distribution of the hydraulic flow in the tank. Since the incident that occurred on one of the two EPRs at Taishan in China, in 2021, we have had some feedback: it has been established that this equipment generates poor distribution of hydraulic flow which causes greater fluctuations. greater than expected in the neutron flux, which could lead to difficulties in controlling the nuclear reaction. Although ASN asked EDF to modify the lower plenum, the studies are still in progress………………………………………………………….

In China, to avoid major problems while waiting for the modification of the lower plenum, the power of the reactors (officially 1,750 MW) would have been limited to 1,500 MW. Will this also be the case for the Flamanville EPR? Questioned during the CLI meeting on April 12 by Yannick Rousselet, neither ASN nor EDF deigned to respond.

Let’s cross our fingers, hoping that there will be no runaway nuclear reaction in the Flamanville EPR tank. Especially since Libération revealed in July 2022, two systems of probes and sensors essential for operating the reactor, installed either in the tank or outside, are malfunctioning.

The EPR, political totem

“It would have been smarter to do all this work before the reactor was started,” exasperates Gilles Reynaud, the president of Ma Zone Contrôlée , which brings together nuclear subcontracting employees. But EDF wants to put the EPR into production to say: “that’s it, it works.” Doing all this work afterwards, I don’t find it very respectful for the workers and the population. » 

No matter the cost

“We are starting at all costs for purely political reasons,” judge Yannick Rousselet, interviewed by Blast at the end of the CLI on April 12. As President Macron announced the relaunch of nuclear power with the construction of new EPRs, they want to send the message that we are out of the rut. » For Rousselet, this is a very short-term vision: “Even if this reactor shuts down in a few months for a long period, no one cares. We must be able to say: “That’s it, the Flamanville EPR is loaded. He started.” This is what is most dangerous. We don’t try to solve the problems first. »

The secrets of an engineer

And then, potentially, there is another problem in the medium term. Recently, an engineer, Thierry C, contacted Blast to tell us about his short experience in nuclear power.

………………………………. “When I took the file, I quickly realized that most of the valves that had to be installed could not meet the temperature and pressure conditions planned during these requalification tests,” he explains to Blast. Of the approximately 650 pipes equipped with valves, there were approximately 450 that had to be cut to remove the equipment and replace it with a temporary device to block the pipes. » A not really reassuring observation. “I spoke about it to my superiors who asked me to keep quiet and not talk to EDF about it. »

The documents and plans consulted by Blast seem to confirm these remarks. Which poses a problem: the requalification tests must be carried out with the valves to be validated. However, this analysis work was carried out in 2008-2009, when the EPR construction site, which had just started, was still in the civil engineering stage. Thierry C. left the group shortly after carrying out this study. What has happened since then? Has the error made by Alstom on the technical characteristics of the valves been corrected? Impossible to know: neither EDF, nor ASN, nor IRSN wanted to answer us.

Overall, given these unresolved problems and the lack of transparency from EDF and ASN regarding the technical setbacks of the installation, within the Flamanville CLI but also vis-à-vis the press, the long nightmare of the EPR construction site may not be over. This bad dream led to its bill exploding – which reached some 19.1 billion euros .  A farce that could end up boring and no longer make anyone laugh. https://www.blast-info.fr/articles/2024/nucleaire-a-flamanville-la-farce-de-lepr-se-poursuit-G9PeKawaRwmShmxp6sJL3g

April 25, 2024 - Posted by Christina Macpherson | Uncategorized | energy, news, nuclear, nuclear-energy, nuclear-power