Hostname: page-component-8448b6f56d-wq2xx Total loading time: 0 Render date: 2024-04-19T23:08:31.029Z Has data issue: false hasContentIssue false
  • English
  • Français

Performance of CVR Coatings for PBR Fuels

Published online by Cambridge University Press:  22 February 2011

Jay W. Adams ,
R. E. Barletta ,
J. Svandrlik  and
P. E. Vanier
Jay W. Adams
Affiliation:
Brookhaven National Laboratory, Upton, NY 11973
R. E. Barletta
Affiliation:
Brookhaven National Laboratory, Upton, NY 11973
J. Svandrlik
Affiliation:
Brookhaven National Laboratory, Upton, NY 11973
P. E. Vanier
Affiliation:
Brookhaven National Laboratory, Upton, NY 11973
Get access

Abstract

As a part of the component development process for the particle bed reactor (PBR), it is necessary to develop coatings for fuel particles which will be time and temperature stable. These coatings must not only protect the particle from attack by the hydrogen coolant, but must also help to maintain the bed in a coolable geometry and mitigate against fission product release. In order to develop these advanced coatings, a process to produce chemical vapor reaction (CVR) coatings on fuel for PBRs has been developed.

The initial screening tests for these coatings consisted of testing in flowing hot hydrogen at one atmosphere. Surrogate fuel particles consisting of pyrolytic graphite coated graphite particles have been heated in flowing hydrogen at constant temperature. The carbon loss from these particles was measured as a function of time. Exposure temperatures ranging from 2500 to 3000 K were used and samples were exposed for up to 14 minutes in a cyclical fashion, cooling to room temperature between exposures. The rate of weight loss measured as a function of time is compared to that from other tests of coated materials under similar conditions. Microscopic examination of the coatings before and after exposure was also conducted and these results are presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 327: Symposium N – Covalent Ceramics II: Non-Oxides , 1993 , 145
Copyright
Copyright © Materials Research Society 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Barletta, R. E., Vanier, P. E., Dowell, M. B. and Lennartz, J. A., “The Development of CVR Coatings for PBR Fuels”, in Covalent Ceramics II: Non-Oxides, editied by Barron, A. R. (Mat. Res. Soc. Proc. 327, Pittsburgh, PA, 1994).Google Scholar
2. Barletta, R. E., Vanier, P. E., Adams, J. W. and Svandrlik, J. F., “Carbon Erosion in Hydrogen - The “Midband” Problem Revisited”, Tenth Symposium on Space Nuclear Power and Propulsion, M. S. El-Genk and Hoover, M. D., eds., AIP Conference Proceedings 271, CONF930103,1993, p 245.Google Scholar
3. Dowell, M., Advanced Ceramics Corporation, private communication.Google Scholar
4. Adams, J. W., Barletta, R. E., Svandrlik, J. and P. E., , , Vanier, “Performance of CVD and CVR Coated Carbon-Carbon in High Temperature Hydrogen”, in Covalent Ceramics II: Non-Oxides, editied by Barron, A. R. (Mat. Res. Soc. Proc. 327, Pittsburgh, PA, 1994).Google Scholar
5. Barletta, R. E., P. E., , , Vanier, J. W., , , Adams, Svandrlik, J. F. and Powell, J. R., “Performance of Carbon Based Hot Frit Substrates. 2. Coating Performance Studies in Hydrogen at Atmospheric Pressure”, BNL Informal Report, BNL-49385, 1993.Google Scholar
6. Clarke, J. T. and Fox, R. R., J. Chem. Phys., 46, 827 (1967).Google Scholar