Irradiation embrittlement monitoring of WWER-440/213 TYPE RPVs |
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Authors: | Ludoví t Kupa,Peter Beo |
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Affiliation: | NPPRI (VÚJE) Trnava Comp., Okruná 5, 918 64 Trnava, Slovak Republic |
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Abstract: | In the paper the main goals and progress of the surveillance specimen programme for the RPVs WWER-440/213 in Jaslovské Bohunice V-2 and Mochovce NPPs are presented. At Jaslovské Bohunice V-2, the standard surveillance specimen programme (SSSP) was finished and so-called ‘Extended Surveillance Specimen Programme’ (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 ‘Modern 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 Jaslovské Bohunice V-2 NPP are presented in the paper too. |
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Keywords: | Abbreviations: 15CH2MFA, steel used for RPV WWER-440 construction by GOST standard ASTM, American Society for Testing and Materials BM, base metal COD, crack opening displacement EOL, end of life EPA, electron– positron annihilation ESSP, Extended Surveillance Specimen Programme HAZ, heat affected zone IAEA, International Atomic Energy Agency KCV, Charpy-V notch test MS, Mö ssbauer spectroscopy MSSP, Modern Surveillance Specimen Programme NPP, nuclear power plant NPPRI, nuclear power plant research institute (VÚ JE Trnava Comp. Slovak Republic) NRASR, Nuclear Regulatory Authority of Slovak Republic RPV, reactor pressure vessel TEM, transmission electron microscopy Tkf, brittle fracture temperature SPT, shear punch test SSSP, standard surveillance specimen programme STN, Slovenská Technická Norma (Slovak Technical Standard) WANO, World Association of Nuclear Operators WM, weld metal WWER, 440/213-PWR type original Russian technology equipped with SSSP |
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