FATIGUE BEHAVIOR OF COLD SPRAY-COATED ACCIDENT TOLERANT CLADDING

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

FATIGUE BEHAVIOR OF COLD SPRAY-COATED ACCIDENT TOLERANT CLADDING

Popis výsledku v původním jazyce

The Zircaloy cladding is subjected to oscillating loads during normal operation in Light Water Reactors (LWRs). Crack initiation and growth due to vibrations and pressure variations in fuel cladding can jeopardize its integrity and might lead to plant downtime costs and safety concerns. Coated claddings are considered a near-term Accident Tolerant Fuel concept, where the primarily goal is to protect the Zircaloy substrate with a corrosion-resistant coating. Therefore the fatigue behavior of the coating is crucial in its ability to protect the base Zircaloy material as crack initiation and growth in the coating could lead to exposure of the Zircaloy to the reactor coolant. Of particular interest, the fatigue behavior of cold spray coated Zr-based alloys has not been studied in detail. The cold-spray technique can substantially affect the substrate and its properties at the interface which brings new questions to the problem of fatigue behavior in the bulk material. In this work, fatigue behavior of Zr-based alloy coated with FeCrAl, Cr, and Mo by cold spray was studied at room temperature and NWC environment. The experimental system is described and preliminary results are presented. The behavior of the reference uncoated case (pure Zircaloy-4) is also compared to the coated materials.

Název v anglickém jazyce

FATIGUE BEHAVIOR OF COLD SPRAY-COATED ACCIDENT TOLERANT CLADDING

Popis výsledku anglicky

The Zircaloy cladding is subjected to oscillating loads during normal operation in Light Water Reactors (LWRs). Crack initiation and growth due to vibrations and pressure variations in fuel cladding can jeopardize its integrity and might lead to plant downtime costs and safety concerns. Coated claddings are considered a near-term Accident Tolerant Fuel concept, where the primarily goal is to protect the Zircaloy substrate with a corrosion-resistant coating. Therefore the fatigue behavior of the coating is crucial in its ability to protect the base Zircaloy material as crack initiation and growth in the coating could lead to exposure of the Zircaloy to the reactor coolant. Of particular interest, the fatigue behavior of cold spray coated Zr-based alloys has not been studied in detail. The cold-spray technique can substantially affect the substrate and its properties at the interface which brings new questions to the problem of fatigue behavior in the bulk material. In this work, fatigue behavior of Zr-based alloy coated with FeCrAl, Cr, and Mo by cold spray was studied at room temperature and NWC environment. The experimental system is described and preliminary results are presented. The behavior of the reference uncoated case (pure Zircaloy-4) is also compared to the coated materials.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20506 - Coating and films

Projekt

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Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

TopFuel 2018 Water Reactor Fuel Performance

ISBN

978-92-95064-32-4

ISSN

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e-ISSN

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Počet stran výsledku

15

Strana od-do

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Název nakladatele

European Nuclear Society

Místo vydání

Brusel

Místo konání akce

Praha

Datum konání akce

30. 9. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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