The debris fretting resistance studies on coated fuel claddings

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F21%3AN0000102" target="_blank" >RIV/26722445:_____/21:N0000102 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.euronuclear.org/scientific-resources/conference-proceedings/#1559592636459-42447d8c-0fcc" target="_blank" >https://www.euronuclear.org/scientific-resources/conference-proceedings/#1559592636459-42447d8c-0fcc</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The debris fretting resistance studies on coated fuel claddings

Popis výsledku v původním jazyce

The debris-fretting-based fuel failure is still a relevant issue, despite decades of R&D intended to improve the fuel's physical parameters. The Research Centre Řež, over the last couple of years, developed its own method for conducting the comparison tests between specified specimens, one of which is the reference for the others. The presented paper shows the results of the experiments performed on Zr-1%Nb alloy tube specimens covered with protective Cr- and N-based coatings. The experiment's set included debris-fretting tests in dry conditions at room temperature, microscopic measurement of the grooves' depths, and a detailed analysis by SEM-EDX and SEM-FIB. The dry, room temperature conditions were selected as the first step in the long-term study. They can be fully regarded as sufficient for the phenomenon's study; hence the aim of the tests is (1) to show differences in debris fretting resistance between the reference Zr-1%Nb specimens and specimens of the same alloy covered with various coatings, and (2) to prove the positive impact of coating applications on fuel cladding endurance. The selected specimens were coated with pure Cr, CrN, CrN2, CrN+Cr, CrN2+Cr, and the multilayer coating made of CrN/Cr+Cr layers. The conducted analysis revealed a significant advantage of cladding with a thin, wear-resistant coating layer against standard cladding material. This first step's main idea was to prepare the solid ground basis for the forthcoming research activities like demineralized water conditions in elevated temperatures (ongoing) and autoclave tests in as-real conditions. The developed method foresees equipment and test matrix's abilities to obtain comparable between series and repeatable outputs in each selected condition.

Název v anglickém jazyce

The debris fretting resistance studies on coated fuel claddings

Popis výsledku anglicky

The debris-fretting-based fuel failure is still a relevant issue, despite decades of R&D intended to improve the fuel's physical parameters. The Research Centre Řež, over the last couple of years, developed its own method for conducting the comparison tests between specified specimens, one of which is the reference for the others. The presented paper shows the results of the experiments performed on Zr-1%Nb alloy tube specimens covered with protective Cr- and N-based coatings. The experiment's set included debris-fretting tests in dry conditions at room temperature, microscopic measurement of the grooves' depths, and a detailed analysis by SEM-EDX and SEM-FIB. The dry, room temperature conditions were selected as the first step in the long-term study. They can be fully regarded as sufficient for the phenomenon's study; hence the aim of the tests is (1) to show differences in debris fretting resistance between the reference Zr-1%Nb specimens and specimens of the same alloy covered with various coatings, and (2) to prove the positive impact of coating applications on fuel cladding endurance. The selected specimens were coated with pure Cr, CrN, CrN2, CrN+Cr, CrN2+Cr, and the multilayer coating made of CrN/Cr+Cr layers. The conducted analysis revealed a significant advantage of cladding with a thin, wear-resistant coating layer against standard cladding material. This first step's main idea was to prepare the solid ground basis for the forthcoming research activities like demineralized water conditions in elevated temperatures (ongoing) and autoclave tests in as-real conditions. The developed method foresees equipment and test matrix's abilities to obtain comparable between series and repeatable outputs in each selected condition.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

TopFuel2021

ISBN

978-92-95064-35-5

ISSN

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e-ISSN

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Počet stran výsledku

14

Strana od-do

1-14

Název nakladatele

European Nuclear Society

Místo vydání

Brussels, Belgium

Místo konání akce

Santander, Spain

Datum konání akce

24. 10. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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