Destructive Examinations on Divider Plates from Decommissioned Steam Generators Affected by Superficial Stress Corrosion Cracks

Miloudi, Salem; Firmin, Erwan; Deforge, Damien; Vaillant, François Le; Lemaire, Emmanuel

doi:10.1007/978-3-319-48760-1_130

Cited by 3 publications

(1 citation statement)

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“…7) in nominal primary water. Pressurizer heaters [38,39], made of stainless steels, and steam generator divider plates [40][41][42], made of rolled Alloy 600 were both affected by SCC. In each case, the level of deformation and heterogeneity at a macroscale, captured by micro hardness or neutron diffraction, was believed to play a major role in the occurrence, location, and kinetics of SCC [43,44].…”

Section: State Of the Artmentioning

confidence: 99%

Using Microscopy to Help with the Understanding of Degradation Mechanisms Observed in Materials of Pressurized Water Reactors

Legras¹,

Volgin²,

Radiguet³

et al. 2017

JMSE-B

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Abstract:Even if temperature, pressure and chemistry of the cooling water are not very high and aggressive, materials used in PWRs (Pressurized Water Reactors) are exposed to different degradation mechanisms. One of the main goals of the research programs in this field is to develop physical model of the mechanisms down to the atomic scale. Such approach needs a clear description and understanding of the degradation mechanisms at the same small scale. This paper illustrates the benefits of different microscopies and of their last improvements up to the promising possibilities of monochromated and aberrations corrected TEM/STEM. A specific focus is placed on four different degradation mechanisms observed in austenitic stainless steel: irradiation ageing, corrosion fatigue, stress corrosion cracking and corrosion.

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Section: State Of the Artmentioning

confidence: 99%