SANS investigation of neutron-irradiated RPV steels with special emphasis on Ni effect


SANS investigation of neutron-irradiated RPV steels with special emphasis on Ni effect

Ulbricht, A.; Bergner, F.; Pranzas, K. P.

The SANS experiment is aimed at studying the influence of neutron fluence and Ni content on irradiation-induced changes of the microstructure of WWER 1000-type reactor pressure vessel (RPV) steel. A feature of this material is a high Ni content (> 1 wt.-%) in comparison with other RPV steels. Specimens from two WWER 1000 steels with different composition, one single neutron fluence each, were analysed in a previous investigation. It turned out that:

There is a monomodal size distribution of irradiation-induced defects with an average radius of about 1 nm.
The total volume fraction of defects is significantly higher than for WWER 440 steels, which had been investigated before in more detail also by other groups.

  • Contribution to external collection
    A. Schreyer, J. Vollbrandt, R. Willumeit: GeNF - Experimental Reports 2005, GKSS 2006/4, Geesthacht: GKSS Forschungszentrum Geesthacht GmbH, 2006, 107-108

Permalink: https://www.hzdr.de/publications/Publ-8035
Publ.-Id: 8035