Irradiation embrittlement monitoring of WWER-440/213 TYPE RPVs

In the paper the main goals and progress of the surveillance specimen programme for the RPVs WWER-440/213 in Jaslovske Bohunice V-2 and Mochovce NPPs are presented. At Jaslovske Bohunice V-2, the standard surveillance specimen programme (SSSP) was finished and so-called ʹExtended Surveillance Specimen Programmeʹ (ESSP) was prepared on the base of its critical analysis. For first two units of the Mochovce NPP completely new programmes of irradiation embrittlement monitoring called ʹModem Surveillance Specimen Programme" is prepared. It is based on the experience with SSSP and ESSP as well as the recommendations of IAEA experts. This programme will serve for Mochovce NPP during all planned service life. The experience of ESSP application on the 3rd and 4th units in Jaslovske Bohunice V-2 NPP are presented in the paper too.