Engineering Version of Local Approach to Fracture and its Application for RPV Lifetime Prediction

Sergiy Kotrechko; Galyna Zimina; Volodymyr Revka; Ivo Dlouhý

doi:10.4028/www.scientific.net/KEM.810.15

Paper Titles

Preface

Fracture Toughness and Charpy Impact Test of MIM Steels and Correlation of Results by K_IC- CVN Relationships
p.1

Stress Distribution in Front of the Crack - Analytical Solutions vs. Numerical. Can the Differences be Minimized?
p.7

Engineering Version of Local Approach to Fracture and its Application for RPV Lifetime Prediction
p.15

Effect of Heat Treatment at (β+γ) Two Phase Region on Fracture Toughness in TiAl Intermetallic Compound
p.21

Microstructural Change and Fracture Behavior under Different Heat Exposure Conditions on Thermal Barrier Coatings Deposited on TiAl Intermetallic Compound
p.27

Fatigue Crack Growth Thresholds under Negative Stress Ratio for Aluminium Alloys
p.34

Novel Methods for High-Cycle Fatigue Life Determination
p.40

Cyclic Plastic Properties of a Lead Free Solder
p.46

HomeKey Engineering MaterialsKey Engineering Materials Vol. 810Engineering Version of Local Approach to Fracture...

Engineering Version of Local Approach to Fracture and its Application for RPV Lifetime Prediction

Abstract:

Theoretical basis of the simplified (engineering) version of Local Approach (LA) to fracture is summarized, and the possibility of using this version to predict the lifetime of RPV steels is demonstrated. The concept of “effective” volume, , within which stresses and strains are uniformly distributed, but the magnitude of the probability of cleavage initiation are equal to their real values at given value of , underlies the proposed engineering version of LA. A function was selected to describe the temperature dependence of local cleavage stress, and a calibration procedure was proposed for determining the constants in this dependence from the results of tests of surveillance specimens. For weld metal of WWER-1000 reactors the dependences of brittle strength on fluence were obtained, and the maximum permissible fluence values were determined. It is shown that in addition to the radiation hardening, the radiation-induced reduction in the level of brittle strength, , has a significant effect on the radiation service life of reactor pressure vessel steel.

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Periodical:

Key Engineering Materials (Volume 810)

Pages:

15-20

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.810.15

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Online since:

July 2019

Authors:

Sergiy Kotrechko*, Galyna Zimina, Volodymyr Revka, Ivo Dlouhý

Keywords:

Local Approach To Fracture, Radiation Embrittlement, RPV Integrity, RPV Lifetime

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