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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
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SYSNO ASEP 0473300 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title 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 Author(s) Negyesi, M. (CZ)
Krejčí, J. (CZ)
Linhart, S. (CZ)
Novotný, L. (CZ)
Přibyl, A. (CZ)
Burda, J. (CZ)
Klouček, V. (CZ)
Lorinčík, Jan (URE-Y)
Sopoušek, J. (CZ)
Adámek, J. (CZ)
Siegl, J. (CZ)
Vrtílková, V. (CZ)Source Title ZIRCONIUM IN THE NUCLEAR INDUSTRY: 17TH INTERNATIONAL SYMPOSIUM. - Philadelphia : American Society for Testing and Materials, 2015 - ISSN 0066-0558 - ISBN 978-0-8031-7529-7 Pages s. 897-931 Number of pages 35 s. Publication form Print - P Action 17th International Symposium on Zirconium in the Nuclear Industry Event date 03.02.2013 - 07.02.2013 VEvent location Hyderabad Country IN - India Event type WRD Language eng - English Country US - United States Keywords Microstructure ; Fuel cladding ; Zr1Nb-O Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering Institutional support URE-Y - RVO:67985882 UT WOS 000371681000032 EID SCOPUS 84930362494 DOI 10.1520/STP154320120162 Annotation 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-O 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-O phase diagram describing the double-sided high-temperature oxidation of the Zr1Nb fuel cladding including the (alpha vertical bar beta)-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 Workplace Institute of Radio Engineering and Electronics Contact Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Year of Publishing 2017
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