Analysis of Steam Generators Corrosion Products from Slovak NPP Bohunice | Zendy

Jarmila Degmová | Zendy; Július Dekan | Zendy; Vladimı́r Slugeň | Zendy; Constanze Thees | Zendy; I. Smieško | Zendy; Pavol Šeliga | Zendy

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Analysis of Steam Generators Corrosion Products from Slovak NPP Bohunice

Author(s) -

Jarmila Degmová,

Július Dekan,

Vladimı́r Slugeň,

Constanze Thees,

I. Smieško,

Pavol Šeliga

Publication year - 2012

Publication title -

international journal of corrosion

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.312

H-Index - 18

eISSN - 1687-9333

pISSN - 1687-9325

DOI - 10.1155/2012/643727

Subject(s) - corrosion , hematite , magnetite , materials science , nuclear power , boiler (water heating) , nuclear power plant , nuclear engineering , metallurgy , waste management , engineering , physics , nuclear physics , ecology , biology

One of the main goals of the nuclear industry is to increase the nuclear safety and reliability of nuclear power plants (NPPs). As the steam generator (SG) is the most corrosion sensitive component of NPPs, it is important to analyze the corrosion process and optimize its construction materials to avoid damages like corrosion cracking. For this purpose two different kinds of SGs and its feed water distributing systems from the NPP Jaslovske Bohunice were studied by nondestructive Mössbauer spectroscopy. The samples were scraped from the surface and analyzed in transmission geometry. Magnetite and hematite were found to be the main components in the corrosion layers of both SGs. Dependant of the material the SG consisted of, and the location in the system where the samples were taken, the ratios between magnetite and hematite and the paramagnetic components were different. The obtained results can be used to improve corrosion safety of the VVER-440 secondary circuit as well as to optimize its water chemistry regime

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