15Kh2MFA-type steel forgings were irradiated in an accelerated surveillance position of a power reactor, up to about 1 × 1021n/cm2, E > 1 MeV with medium flux. This steel is a Cr-Mo-V-type low-copper reactor pressure vessel material. 15Kh2MFA was microstructurally tested as received and in three different irradiation states within the frame of the LONGLIFE project. The following microstructural tests were performed: metallography, fractography, transmission electron microscopy, small angle neutron scattering, and atom-probe tomography. The aim of the current paper is to summarize the results that were evaluated by the six European institutes performing the study. The SANS tests show that the cluster volume fraction growth is nearly linear as a function of the fluence, and atom-probe tomography concludes that vanadium carbide precipitations were already originally present in the as-received steel. During irradiation these precipitates are enriched with Mo, Cu, and Cr. At the highest dose Mn, Si, and Ni are also attached to these clusters.
Author Information
Gillemot, Ferenc
Centre for Energy Research of the Hungarian Academy of Sciences, Budapest, HU
Horváth, Ákos
Centre for Energy Research of the Hungarian Academy of Sciences, Budapest, HU
Horváth, Márta
Centre for Energy Research of the Hungarian Academy of Sciences, Budapest, HU
Kovács, Attila
Centre for Energy Research of the Hungarian Academy of Sciences, Budapest, HU
Radiguet, Bertrand
Groupe de Physique des Matériaux, UMR CNRS 6634, Université et INSA de Rouen, Rouen, FR
Cammelli, Sebastiano
Groupe de Physique des Matériaux, UMR CNRS 6634, Université et INSA de Rouen, Rouen, FR
Pareige, Philippe
Groupe de Physique des Matériaux, UMR CNRS 6634, Université et INSA de Rouen, Rouen, FR
Mayoral, Mercedes, Hernández
CIEMAT, Madrid, ES
Ulbricht, Andreas
Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, DE
Kresz, Norbert
Nuclear Power Plant, Paks, HU
Oszwald, Ferenc
Nuclear Power Plant, Paks, HU
Török, Gyula
Wigner Research Center for Physics of the Hungarian Academy of Sciences, Budapest, HU
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