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Structural integrity assessment and lifetime prediction for the control rods couplings of the WWER-440 reactor. Part 3. Optimi- zation of post-irradiation recovery annealing of the control rods couplings
https://doi.org/10.22349/1994-6716-2021-105-1-177-191
Abstract
The optimization of post-irradiation recovery annealing of metal of control rods couplings (marten- sitic-ferritic stainless steel 14Kh17N2 grade, analogue of AISI 431 steel) is carried out. It is shown that the optimized recovery annealing leads to complete recovery of the mechanical properties of coupling metal embrittled under neutron irradiation. The recovery annealing does not reduce corrosion resistance of control rod tube made of austenitic stainless steel 08Kh18N10T grade (analogue of AISI 321 steel).
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 VVER-440 to 60 years”, financed by Rosenergoatom Concern JSC.
About the Authors
A. J. Minkin
NRC “Kurchatov Institute” – CRISM “Prometey”
49 Shpalernaya St, 191015 St Petersburg
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
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
A. M. Shumko
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Shumko A. M.
49 Shpalernaya St, 191015 St Petersburg
S. N. Petrov
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Petrov S. N., Cand Sc. (Chem)
49 Shpalernaya St, 191015 St Petersburg
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Review
For citations:
Minkin A.J., Margolin B.Z., Belyaeva L.A., Pirogova N.E., Shumko A.M., Petrov S.N. Structural integrity assessment and lifetime prediction for the control rods couplings of the WWER-440 reactor. Part 3. Optimi- zation of post-irradiation recovery annealing of the control rods couplings. Voprosy Materialovedeniya. 2021;(1(105)):177-191. (In Russ.) https://doi.org/10.22349/1994-6716-2021-105-1-177-191
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