Contribution to the study of the pseudobinary Zr1Nb-O phase diagram and its application to numerical modeling of the high-temperature steam oxidation of Zr1Nb fuel cladding

Kód výsledku v IS VaVaI

RIV/46356088:_____/15:#0001735 - isvavai.cz

Nalezeny alternativní kódy

RIV/60193247:_____/13:UJP1614B RIV/68407700:21340/15:00225333 RIV/67985882:_____/15:00473300

Výsledek na webu

http://dx.doi.org/10.1520/STP154320120162

DOI - Digital Object Identifier

10.1520/STP154320120162

Jazyk výsledku

angličtina

Název v původním jazyce

Contribution to the study of the pseudobinary Zr1Nb-O phase diagram and its application to numerical modeling of the high-temperature steam oxidation of Zr1Nb fuel cladding

Popis výsledku v původním jazyce

The pseudobinary Zr1Nb-O phase diagram was recently estimated at the Czech research institute UJP using a new experimental procedure. It is based on the oxygen distribution measurement inside fuel claddings previously exposed to high-temperature steam environments, assuming equilibrium conditions being fulfilled at the phase boundaries. The experimental results agreed satisfactorily with the CALPHAD approach, and a further experimental program followed to affirm the phase diagram. This paper is concerned with additional measurements of the oxygen concentrations using wavelength-dispersive spectrometry, secondary ion mass spectrometry, and inert gas fusion techniques and examination of the microstructure in the Zr1Nb cladding wall after high-temperature oxidation. The main goal was to check the validity of the recently proposed Zr1Nb-0 phase diagram, or to refine it. The new results of the oxygen concentration measurements confirmed the phase diagram. After that, a new diffusion model, the Jakub Krejci oxidation model, was created using the Zr1Nb-0 phase diagram describing the double-sided high-temperature oxidation of the Zr1Nb fuel cladding including the (α + β)-Zr layer. The numerical calculations were compared to the experimental results with satisfactory agreement. It could be concluded that the proposed experimental procedure provided a good estimation of the Zr1Nb-O phase diagram. Moreover, it can be used for alloys containing a greater amount of hydrogen. The Zr1Nb-O phase diagram may be applicable for oxygen diffusion models predicting the oxidation behavior of Zr1Nb fuel claddings upon high-temperature oxidation.

Název v anglickém jazyce

Contribution to the study of the pseudobinary Zr1Nb-O phase diagram and its application to numerical modeling of the high-temperature steam oxidation of Zr1Nb fuel cladding

Popis výsledku anglicky

The pseudobinary Zr1Nb-O phase diagram was recently estimated at the Czech research institute UJP using a new experimental procedure. It is based on the oxygen distribution measurement inside fuel claddings previously exposed to high-temperature steam environments, assuming equilibrium conditions being fulfilled at the phase boundaries. The experimental results agreed satisfactorily with the CALPHAD approach, and a further experimental program followed to affirm the phase diagram. This paper is concerned with additional measurements of the oxygen concentrations using wavelength-dispersive spectrometry, secondary ion mass spectrometry, and inert gas fusion techniques and examination of the microstructure in the Zr1Nb cladding wall after high-temperature oxidation. The main goal was to check the validity of the recently proposed Zr1Nb-0 phase diagram, or to refine it. The new results of the oxygen concentration measurements confirmed the phase diagram. After that, a new diffusion model, the Jakub Krejci oxidation model, was created using the Zr1Nb-0 phase diagram describing the double-sided high-temperature oxidation of the Zr1Nb fuel cladding including the (α + β)-Zr layer. The numerical calculations were compared to the experimental results with satisfactory agreement. It could be concluded that the proposed experimental procedure provided a good estimation of the Zr1Nb-O phase diagram. Moreover, it can be used for alloys containing a greater amount of hydrogen. The Zr1Nb-O phase diagram may be applicable for oxygen diffusion models predicting the oxidation behavior of Zr1Nb fuel claddings upon high-temperature oxidation.

Druh

D - Stať ve sborníku

CEP obor

JF - Jaderná energetika

OECD FORD obor

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Projekt

TA02011025: Creepové a oxidační charakteristiky povlakové trubky E110 v podmínkách teplotního přechodu LOCA

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

ASTM Special Technical Publication, STP 1543; 17th International Symposium on Zirconium in the Nuclear Industry

ISBN

9780803175297

ISSN

0066-0558

e-ISSN

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Počet stran výsledku

35

Strana od-do

897-931

Název nakladatele

ASTM International

Místo vydání

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Místo konání akce

Hyderabad, Andhra Pradesh, India

Datum konání akce

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Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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