Performance of CVR coatings for PBR fuels
As 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 2,500 to 3,000 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.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- Department of Defense, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 10115283
- Report Number(s):
- BNL-49297; CONF-931108-42; ON: DE94005192; TRN: AHC29403%%4
- Resource Relation:
- Conference: Fall meeting of the Materials Research Society (MRS),Boston, MA (United States),29 Nov - 3 Dec 1993; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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36 MATERIALS SCIENCE
SPACE PROPULSION REACTORS
COATED FUEL PARTICLES
FUEL DISPERSION REACTORS
NIOBIUM CARBIDES
CHEMICAL VAPOR DEPOSITION
HYDRIDATION
TANTALUM CARBIDES
CORROSION RESISTANCE
EXPERIMENTAL DATA
NESDPS Office of Nuclear Energy Space and Defense Power Systems
210600
360201
360205
POWER REACTORS, MOBILE, PROPULSION, PACKAGE, AND TRANSPORTABLE
PREPARATION AND FABRICATION
CORROSION AND EROSION