Published 1996 | Version v1
Journal article Metadata-only

Investigation of corrosion cracks in PGV-1000 collector studs

Creators

  • 1. Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, Sofia (Bulgaria)
  • 2. NEK AD, klon AETs Kozloduy, Kozloduy (Bulgaria)

Description

Metallographic control of the primary circuit stubs in the Kozloduy NPP unit 6 have shown numerous corrosion cracks in the perlite steel 38GN2MFA. Samples cut from the surfaces of studs with different corrosion cracks are examined by optical microscopy (Neophot), electron microscopy with quantitative analysis (JEOL SuperProbe), photo-electron spectroscopy, X-ray diffraction, X-ray fluorescence analysis and Moessbauer spectroscopy. The results showed considerable changes in thickness and chemical composition of the phosphate coating. For the first time Pb is detected on the surface of WWER-1000 steam generator studs. Possible corrosion mechanisms are discussed taking into account the phosphate coating technology applied for the stubs

Additional details

Additional titles

Original title (Bulgarian)
Izsledvane na korozionnite povredi vyrkhu kolektorni shpilki na parogeneratori PGV-1000

Publishing Information

Journal Title
Dokladi na BYaD
Journal Volume
1
Journal Issue
1
Journal Page Range
p. 72-73.
ISSN
1310-8727

INIS

Country of Publication
Bulgaria
Country of Input or Organization
Bulgaria
INIS RN
28067012
Subject category
S36: MATERIALS SCIENCE; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
CORROSION; CORROSIVE EFFECTS; KOZLODUY-6 REACTOR; LEAD; PEARLITE; PHOSPHATES; QUANTITATIVE CHEMICAL ANALYSIS; STEAM GENERATORS; STEELS; SURFACE COATING
Descriptors DEC
ALLOYS; BOILERS; CARBON ADDITIONS; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; DEPOSITION; ELEMENTS; ENRICHED URANIUM REACTORS; IRON ALLOYS; IRON BASE ALLOYS; METALS; OXYGEN COMPOUNDS; PHOSPHORUS COMPOUNDS; POWER REACTORS; PWR TYPE REACTORS; REACTORS; THERMAL REACTORS; TRANSITION ELEMENT ALLOYS; VAPOR GENERATORS; WATER COOLED REACTORS; WATER MODERATED REACTORS; WWER TYPE REACTORS

Optional Information

Notes
2 refs., 2 tabs., 3 figs.