Analyses of thermal annealing influence on WWER 440 reactor pressure vessel internals materials

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46356088%3A_____%2F19%3AN0000025" target="_blank" >RIV/46356088:_____/19:N0000025 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21340/19:00339550

Result on the web

<a href="http://www.tanger.cz" target="_blank" >http://www.tanger.cz</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Analyses of thermal annealing influence on WWER 440 reactor pressure vessel internals materials

Original language description

Thermal annealing is a proven material treatment method applicable to WWER type reactor pressure vessels with the aim of prolonging their operational lifetime. However, reactor pressure vessel internals of nuclear power plants are exposed to more severe operating conditions (high pressure and temperatures, higher neutron flux, corrosion environment), which cause gradual degradation of their mechanical properties. Thermal annealing can be one of the possible solutions to re-establish initial mechanical properties of reactor pressure vessel internals materials and thus can contribute to long term operation of nuclear power plants. This paper presents results of mechanical properties evaluation (especially hardness) of non-annealed and annealed state of material of WWER 440 - type reactor internals in initial un-irradiated conditions. Within the project an extensive program of experimental activities realized on un-irradiated materials in initial, work hardened, and annealed state was performed to create basis for further analyses on irradiated structural materials. As an integral part of experimental activities microstructural analyses were also incorporated to study of structural changes of non-annealed and annealed material. This paper includes results obtained within the project TH02020565 “Assurance of Safe and Long-Term Operation of Nuclear Pressure Vessel Internals” which is realized by ÚJV Řež, a. s. in cooperation with Czech Technical University in Prague, FNSPE, in the period from 2017 to 2020 with the support of Technology Agency of the Czech Republic.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20306 - Audio engineering, reliability analysis

Project

<a href="/en/project/TH02020565" target="_blank" >TH02020565: Assurance of Safe and Long Term Operation of Nuclear Reactor Pressure Vessel Internals</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

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

Article name in the collection

METAL 2019 - 28th International Conference on Metallurgy and Materials, Conference Proceedings

ISBN

978-808729492-5

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

787-792

Publisher name

Tanger, Ltd.

Place of publication

Ostrava

Event location

Brno

Event date

May 22, 2019

Type of event by nationality

CST - Celostátní akce

UT code for WoS article

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