alloys, AREVA, carbon steel, dangers of nuclear, EDF, embrittlement, EPR, Flamanville, Flamaville defects, France, Hinkley Point, hydrogen attack, hydrogen embrittlement, New Nuclear, nuclear energy, nuclear reactor defects, nuclear reactor pressure vessel, nuclear reactor pressure vessel defects, nuclear reactors, state capitalism, substandard steel, UK
Why are Jersey and Guernsey putting up with Flamanville Nuclear Reactors? Aren’t they rich tax havens? Will the Kuwaitis (KIA) sue over this? They are the largest owner of Areva after the French state. Did they know? Hiding this information for months appears securities fraud by Areva.
A nuclear reactor pressure vessel with higher carbon steel in spots, as reported by Areva, especially in a pressurized reactor, means that it is likely to rupture, resulting in a catastrophic nuclear disaster. Having one or more spots made of higher carbon steel, than the rest, is more dangerous than having the whole thing made of higher carbon steel. Even the Bible warned of problems with mismatched quality of materials and subsequent tears or ruptures.
As long suspected by us, based on the US NRC report of their visit to Areva-Le Creusot:
“Anomalies in the Fabrication of the EPR Pressure Vessel of Flamaville” “Anomalies de fabrication de la cuve de l’EPR de Flamanville” 07/04/2015 11:30 Communiqué de presse (ASN Press Release)
Translation based on the press release:
The ASN (French Nuclear Safety Authority) was informed by AREVA of anomalies in the composition of the steel in certain parts of the cover and of the bottom of the reactor pressure vessel of Flamanville.
EPR Reactor Pressure Vessel
Regulations relative to pressurized nuclear reactor installations require that the maker do quality control due to risks posed by any heterogenous materials used to make the parts which are the most important for safety. [a]
To respond to this technical requirement, AREVA undertook chemical and mechanical tests on a reactor cover similar to that of the Flamanville EPR. The results of these tests demonstrated, end of 2014, the presence of a zone which had a large concentration of carbon and which led to mechanical resilience values which were weaker than expected. The first tests confirmed the presence of this anomaly in the cover and the bottom of the pressure vessel of the Flamanville EPR.
AREVA proposed to the ASN undertaking, starting in April 2015, a new in-depth series of tests on the representative cover in order to know precisely the location of the zone concerned, as well as its mechanical properties.
The ASN will render a verdict on the test program, will control that it is properly done and will investigate the file that Areva presents to prove the resistance of the EPR reactor pressure vessel of Flamanville. It will notably call upon technical support, the IRSN, and the permanent group of experts dedicated to pressurized nuclear reactor installations.
[NB: The ASN will let Areva “prove” that it’s ok. It’s not ok. It increases the waste of time and money and the chances that they will approve this unsafe pressure vessel.]
The ASN has informed its foreign counterparts involved in the construction of an EPR reactor.
The pressure vessel of a pressurised nuclear reactor is a particularly important part for safety. It contains the fuel and acts as a second confinement barrier against radiation. [Note: The ASN means after the fuel rods, but that’s deceptive. The pressure vessel is the most important.]
The cover and the bottom of the pressure vessel of the EPR at Flamanville are parts forged in partially spherical shape and made from steel.
Note in original : Resilience is an indicator of the ability of the material to resist the propagation of cracks. In the case of the reactor pressure vessel, this property is especially important in the case of thermal shock, for instance following the injection of cold water in the primary circuit of the reactor. http://www.asn. fr/Informer/Actualites/EPR-de-Flamanville-anomalies-de-fabrication-de-la-cuve It’s not just thermal shock. It’s also more prone to high temperature hydrogen attack, embrittlement and sudden failure.
[a] (literally: … requires that the maker master the risks of heterogeneity of materials used to make the parts most important for safety).
Although we still cannot prove it, we have suspected for some time that Areva-Le Creusot was being sold recycled steel from Arcelor-Mittal’s Industeel, because the US NRC found issues with supplier documentation and Areva-Le Creusot seems to source from Industeel. This still does not prove our suspicions true. It remains hypothetical. This is simply one reason that we suspected possible substandard materials.
Industeel is very good to recycle, as everyone should. However, recycling is not acceptable for nuclear reactors because of these very issues. My suspicions that if Flamanville went online it would be the end of Europe appear justified, and that they intend to just shove it on offshore, like the Japanese are doing with Fukushima.
80% of the Pressure Vessel was Japan Steelworks JSW and 20% Areva at Le Creusot, the group said in a letter to AFP: http://www.sortirdunucleaire.org/Nucleaire-la-cuve-de-l-EPR-de-Flamanville-forgee. So, is the bottom made in Japan or France? The lid is made in France. Regardless, big Areva screw-up. A-bas Areva! (A-bas is “down with”, as in down with Apartheid, down with Duvalier, etc.)
document number: ML092800003