Detection and control of as-produced pyrocarbon permeability in biso-coated high-temperature gas-cooled reactor fuel particles
About 60 Biso-coated particle batches with coatings deposited in either 0.13- or 0.24-m dia coaters were studied in this work. These batches were carefully characterized for permeability by neon-helium intrusion, long-term chlorination followed by radiography, and fission gas release. These methods of permeability measurement were compared and correlated with deposition conditions as well as pyrocarbon properties. The results from several irradiation tests were also used to evaluate the validity of the permeability measurements. The neon-helium and long-term chlorination techniques correlated very clearly. Coatings with neon-to-helium ratios below 0.3 were gastight by the chlorination procedure, whereas those with ratios above 0.4 were permeable. The fission gas release technique was unable to distinguish between slightly permeable coatings and gastight ones. Therefore, neon-helium and long-term chlorination procedures are preferred over the fission gas release technique. Results from several irradiation tests verified that coatings with neon-to-helium ratios below 0.3 were gastight, whereas those with ratios above about 0.4 were permeable. 10 figures, 2 tables.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5364663
- Report Number(s):
- ORNL/TM-7254
- Country of Publication:
- United States
- Language:
- English
Similar Records
Characterization of pyrocarbon coatings of HTGR fuel particles by inert gas intrusion
Detection and control of as-produced pyrocarbon permeability in biso-coated high temperature gas-cooled reactor fuel particles
Irradiation-induced permeability in pyrocarbon coatings. Final report of work conducted under PWS FD-12
Technical Report
·
Sat Sep 01 00:00:00 EDT 1979
·
OSTI ID:5944831
Detection and control of as-produced pyrocarbon permeability in biso-coated high temperature gas-cooled reactor fuel particles
Journal Article
·
Sun Jan 31 23:00:00 EST 1982
· Am. Ceram. Soc. Bull.; (United States)
·
OSTI ID:6858130
Irradiation-induced permeability in pyrocarbon coatings. Final report of work conducted under PWS FD-12
Technical Report
·
Fri Oct 01 00:00:00 EDT 1982
·
OSTI ID:6661591
Related Subjects
050700* -- Nuclear Fuels-- Fuels Production & Properties
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210300 -- Power Reactors
Nonbreeding
Graphite Moderated
ACTINIDE COMPOUNDS
CARBON
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORINATION
COATED FUEL PARTICLES
COMPARATIVE EVALUATIONS
CORRELATIONS
CRYOGENIC FLUIDS
DIFFUSION
ELEMENTS
FISSION PRODUCT RELEASE
FLUIDS
FUEL PARTICLES
GAS COOLED REACTORS
GRAPHITE MODERATED REACTORS
HALOGENATION
HELIUM
HTGR TYPE REACTORS
MEASURING METHODS
NEON
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PERMEABILITY
PYROLYTIC CARBON
RARE GASES
REACTORS
THORIUM COMPOUNDS
THORIUM OXIDES
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210300 -- Power Reactors
Nonbreeding
Graphite Moderated
ACTINIDE COMPOUNDS
CARBON
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORINATION
COATED FUEL PARTICLES
COMPARATIVE EVALUATIONS
CORRELATIONS
CRYOGENIC FLUIDS
DIFFUSION
ELEMENTS
FISSION PRODUCT RELEASE
FLUIDS
FUEL PARTICLES
GAS COOLED REACTORS
GRAPHITE MODERATED REACTORS
HALOGENATION
HELIUM
HTGR TYPE REACTORS
MEASURING METHODS
NEON
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PERMEABILITY
PYROLYTIC CARBON
RARE GASES
REACTORS
THORIUM COMPOUNDS
THORIUM OXIDES