The debris fretting resistance studies on coated fuel claddings

Result code in 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>

Result on the web

<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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Result language

angličtina

Original language name

The debris fretting resistance studies on coated fuel claddings

Original language description

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.

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

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

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Article name in the collection

TopFuel2021

ISBN

978-92-95064-35-5

ISSN

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e-ISSN

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Number of pages

14

Pages from-to

1-14

Publisher name

European Nuclear Society

Place of publication

Brussels, Belgium

Event location

Santander, Spain

Event date

Oct 24, 2021

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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