Collection of Replicas to Evaluate the Structural Condition of Steel after Thermal Ageing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F24%3AN0000139" target="_blank" >RIV/26722445:_____/24:N0000139 - isvavai.cz</a>

Výsledek na webu

<a href="https://metalografie.vzup.cz/doc/sbornik-Metalografie2024.pdf" target="_blank" >https://metalografie.vzup.cz/doc/sbornik-Metalografie2024.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Collection of Replicas to Evaluate the Structural Condition of Steel after Thermal Ageing

Popis výsledku v původním jazyce

This article aims to introduce the method of replica sampling and its application in the structural monitoring of steels used in VVER 440 and VVER 1000 type NPPs. For the experiment, samples were created by extracting a part of the primary circulation pipe made of austenitic steel 08Ch18N12T. In total, four conditions were evaluated, namely the initial condition (the part of the pipeline that was not in use), a sample taken after 28 years of operation at the Jaslovské Bohunice V1 NPP, and samples of these conditions after their thermal aging at 450 °C in an atmospheric furnace. The exposure time was set to simulate the extended operation of the component for 60 years (Note: 1 year of operation means 10 months of 100% of power, 2 months in outage). The purpose of the analyses performed was to assess the structural condition of the samples in terms of changes of grain sizes, and the representation of structural phases. A subtask was then used to assess the ability of the replication materials and films to convey this information about the microstructure of the material. Documentation of the microstructure and verification of replicas were carried out by light and scanning electron microscopy.

Název v anglickém jazyce

Collection of Replicas to Evaluate the Structural Condition of Steel after Thermal Ageing

Popis výsledku anglicky

This article aims to introduce the method of replica sampling and its application in the structural monitoring of steels used in VVER 440 and VVER 1000 type NPPs. For the experiment, samples were created by extracting a part of the primary circulation pipe made of austenitic steel 08Ch18N12T. In total, four conditions were evaluated, namely the initial condition (the part of the pipeline that was not in use), a sample taken after 28 years of operation at the Jaslovské Bohunice V1 NPP, and samples of these conditions after their thermal aging at 450 °C in an atmospheric furnace. The exposure time was set to simulate the extended operation of the component for 60 years (Note: 1 year of operation means 10 months of 100% of power, 2 months in outage). The purpose of the analyses performed was to assess the structural condition of the samples in terms of changes of grain sizes, and the representation of structural phases. A subtask was then used to assess the ability of the replication materials and films to convey this information about the microstructure of the material. Documentation of the microstructure and verification of replicas were carried out by light and scanning electron microscopy.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

16th Conference “Contribution of Metallography to Production Problem Solutions” Mariánské Lázně, 3rd -5 th September 2024

ISBN

978-80-01-07331-5

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

117-122

Název nakladatele

ČVUT

Místo vydání

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Místo konání akce

Mariánské Lázně

Datum konání akce

3. 9. 2024

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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