Chapter 46. In-Pile and Out-of-Pile Corrosion Behavior of Thoria- and Urania-Based Nuclear Fuels

  1. John B. Wachtman Jr
  1. J. C. Clayton

Published Online: 26 MAR 2008

DOI: 10.1002/9780470310502.ch46

12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10

12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10

How to Cite

Clayton, J. C. (1988) In-Pile and Out-of-Pile Corrosion Behavior of Thoria- and Urania-Based Nuclear Fuels, in 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310502.ch46

Author Information

  1. Westinghouse Electric Corporation Bettis Atomic Power Laboratory West Mifflin, PA 15122

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780470374818

Online ISBN: 9780470310502

SEARCH

Keywords:

  • diffraction;
  • agglomerated;
  • chemical analyses;
  • effective full power hours;
  • microstructure

Summary

The out-of-pile corrosion behavior of thoria- and urania-based nuclear fuels was studied in 633 K flowing water. Weight changes of the specimens were determined periodically during the corrosion exposures, some of which were as long as 500 days; in addition, ceramographic examinations, X-ray diffraction measurements, and chemical analyses were carried out on selected specimens. The out-of-pile corrosion behavior of the oxide fuels was confirmed by irradiation tests. The in-pile and out-of-pile corrosion tests showed that both ThO2 and Th O2-U O2 (2-50 wt% UO2) fuel have excellent corrosion resistance, the former intrinsically because it cannot be oxidized and the latter because oxidation creates a mechanically stable surface phase.