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Structural integrity assessment and lifetime prediction for the control rods couplings of the WWER-440 reactor. Part 1: Investigation of steel 14Kh17N2 grade embrittlement under neutron irradiation
https://doi.org/10.22349/1994-6716-2021-105-1-145-162
Abstract
The effect of neutron irradiation on the mechanical properties, fracture toughness and hardness of martensitic-ferritic stainless steel 14Kh17N2 grade (analogue of AISI 431 steel) is investigated. The investiga- tion is carried on the metal of control rods couplings of WWER-440 reactor of Unit 3 of Novovoronezh NPP. The metal had neutron fluence up to 8·1020 neutr./cm2. The dependence of yield stress of the steel 14Kh17N2 grade on temperature and neutron dose is defined and correlations between its yield stress, fracture toughness and hardness are evaluated.
Supporting agencies: This article has been prepared as a result of summarizing the studies carried out under the project No 375123 “Investigation of the main mechanical properties and characteristics of fracture resistance of the base metal and metal of welded joints of the elements of the reactor plant No 3 of NVO NPP to support R&D on material science substantiation of the extension of the service life of NPP equipment with WWER-440 to 60 years”, financed by Rosenergoatom Concern JSC.
About the Authors
A. J. Minkin
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Minkin A. J.
49 Shpalernaya St, 191015 St Petersburg
B. Z. Margolin
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Margolin B. Z., Dr Sc. (Eng)
49 Shpalernaya St, 191015 St Petersburg
V. N. Fomenko
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Fomenko V. N., Cand Sc. (Eng)
49 Shpalernaya St, 191015 St Petersburg
L. A. Belyaeva
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Belyaeva L. A., Cand Sc. (Eng)
49 Shpalernaya St, 191015 St Petersburg
N. E. Pirogova
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Pirogova N. E.
49 Shpalernaya St, 191015 St Petersburg
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For citations:
Minkin A.J., Margolin B.Z., Fomenko V.N., Belyaeva L.A., Pirogova N.E. Structural integrity assessment and lifetime prediction for the control rods couplings of the WWER-440 reactor. Part 1: Investigation of steel 14Kh17N2 grade embrittlement under neutron irradiation. Voprosy Materialovedeniya. 2021;(1(105)):145-162. (In Russ.) https://doi.org/10.22349/1994-6716-2021-105-1-145-162
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