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Mechanisms of stress corrosion cracking of irradiated austenitic chromium-nickel steels used for WWER and PWR vessel internals
https://doi.org/10.22349/1994-6716-2020-102-2-174-199
Abstract
This paper presents results of a corrosion cracking test of specimens of irradiated austenitic chromium- nickel steels of grades 321 (Kh18N10T), 316 (06Kh16N11M3) and 304 (02Kh18N9). Specimens were irradiated to different damage dose from 4.5 to 150 dpa. The tests were carried out in autoclaves in the water environment simulating a coolant of the first circuit of WWER reactors at temperatures of 290–315°С. The influence of the damage dose and the neutron energy spectrum on the tendency of steels to stress corrosion cracking (SCC) is analyzed. The dominant SCC mechanisms for various austenitic steels are determined. Loading modes effects on the SCC resistance of specimens irradiated to the same damage dose are compared.
Keywords
austenitic steel,
corrosion cracking,
damage dose,
coolant,
stress corrosion cracking,
neutron energy spectrum
Supporting agencies: This work was carried out within the framework of collaboration with the Material Ageing Institute under the project “Vessel Internal Project VIP 1” (project “Pressure Vessel Internal”).
About the Authors
B. Z. Margolin
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Dr Sc. (Eng)
49 Shpalernaya St, 191015 St Petersburg
N. E. Pirogova
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
A. A. Sorokin
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Cand Sc. (Eng)
49 Shpalernaya St, 191015 St Petersburg
V. I. Kokhonov
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
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Review
For citations:
Margolin B.Z., Pirogova N.E., Sorokin A.A., Kokhonov V.I. Mechanisms of stress corrosion cracking of irradiated austenitic chromium-nickel steels used for WWER and PWR vessel internals. Voprosy Materialovedeniya. 2020;(2(102)):174-199. (In Russ.) https://doi.org/10.22349/1994-6716-2020-102-2-174-199
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