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Structural Integrity Assessment and Lifetime Prediction for Intermediate Control Bayonets of Control and Protection Systems (CPS) of the WWER-440 Reactor: Part 1. Investigation of Embrittlement of 14Kh17N2 Steel under Neutron Irradiation

Authors
  • Minkin, A. J.1
  • Margolin, B. Z.1
  • Fomenko, V. N.1
  • Belyaeva, L. A.1
  • Pirogova, N. E.1
  • 1 National Research Center Kurchatov Institute—CRISM Prometey, St. Petersburg, 191015, Russia , St. Petersburg (Russia)
Type
Published Article
Journal
Inorganic Materials: Applied Research
Publisher
Pleiades Publishing
Publication Date
Nov 01, 2021
Volume
12
Issue
6
Pages
1663–1674
Identifiers
DOI: 10.1134/S2075113321060125
Source
Springer Nature
Keywords
Disciplines
  • Radiation Materials Science
License
Yellow

Abstract

This work studies the effect of neutron irradiation on the mechanical properties, fracture toughness, and hardness of grade 14Kh17N2 steel used for the bayonets of the intermediate rods of the control and protection systems (CPSs) of WWER reactors. The investigation is carried out on the metal of the bayonets irradiated as part of unit 3 of the Novovoronezh NPP to a neutron fluence of up to 8 × 1020 neutr./cm2. The temperature–dose dependence of the yield stress of grade 14Kh17N2 steel is derived, and the correlations among its fracture toughness, structural integrity, and hardness are estimated.

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