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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00509794" target="_blank" >RIV/68081723:_____/19:00509794 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scientific.net/KEM.810.15" target="_blank" >https://www.scientific.net/KEM.810.15</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.810.15" target="_blank" >10.4028/www.scientific.net/KEM.810.15</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

Theoretical basis of the simplified (engineering) version of Local Approach (LA) tonfracture is summarized, and the possibility of using this version to predict the lifetime of RPV steelsnis demonstrated. The concept of “effective” volume, fV , within which stresses and strains arenuniformly distributed, but the magnitude of the probability of cleavage initiation are equal to theirnreal values at given value of IC K , underlies the proposed engineering version of LA. A functionnwas selected to describe the temperature dependence of local cleavage stress, and a calibrationnprocedure was proposed for determining the constants in this dependence from the results of tests ofnsurveillance specimens. For weld metal of WWER-1000 reactors the dependences of brittle strengthnon fluence were obtained, and the maximum permissible fluence values were determined. It isnshown that in addition to the radiation hardening, the radiation-induced reduction in the level ofnbrittle strength, MC R , has a significant effect on the radiation service life of reactor pressure vesselnsteel.

Název v anglickém jazyce

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

Popis výsledku anglicky

Theoretical basis of the simplified (engineering) version of Local Approach (LA) tonfracture is summarized, and the possibility of using this version to predict the lifetime of RPV steelsnis demonstrated. The concept of “effective” volume, fV , within which stresses and strains arenuniformly distributed, but the magnitude of the probability of cleavage initiation are equal to theirnreal values at given value of IC K , underlies the proposed engineering version of LA. A functionnwas selected to describe the temperature dependence of local cleavage stress, and a calibrationnprocedure was proposed for determining the constants in this dependence from the results of tests ofnsurveillance specimens. For weld metal of WWER-1000 reactors the dependences of brittle strengthnon fluence were obtained, and the maximum permissible fluence values were determined. It isnshown that in addition to the radiation hardening, the radiation-induced reduction in the level ofnbrittle strength, MC R , has a significant effect on the radiation service life of reactor pressure vesselnsteel.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

New Methods of Damage and Failure Analysis of Structural Parts

ISBN

978-3-0357-1447-0

ISSN

1013-9826

e-ISSN

—

Počet stran výsledku

6

Strana od-do

15-20

Název nakladatele

Trans Tech Publication

Místo vydání

Zurich

Místo konání akce

Ostrava

Datum konání akce

10. 9. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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