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Published on 29/10/2019 • 12:48 pm

Information notice

Manufacturing deviation at Framatome stress-relieving heat treatment of welds

On 9th September 2019, EDF informed ASN of a deviation concerning the manufacture of nuclear pressure equipment installed in its reactors, and primarily steam generators. During the stress-relieving heat treatment applied to the welds made to assemble nuclear pressure equipment components, the required temperature range has not been respected over the entire area to treat.