Permeability of protective coatings to tritium

Conference · Sun Sep 01 04:00:00 EDT 1985 · Fusion Technol.; (United States)

OSTI ID:5917886

Braun, J M; Williamson, A S

The permeability of four protective coatings to tritium gas and tritiated water was investigated. The coatings, including two epoxies, one vinyl and one urethane, were selected for their suitability in CANDU plant service in Ontario Hydro. Sorption rates of tritium gas into the coatings were considerably larger than for tritiated water, by as much as three to four orders of magnitude. However, as a result of the very large solubility of tritiated water in the coatings, the overall permeability to tritium gas and tritiated water is comparable. Marked differences were also evident among the four coatings, the vinyl exhibiting an abnormally high retention of free water because of a highly porous surface structure. It appears that epoxy coatings having a high pigment-to-binder ratio are most suited for coating concrete in tritium handling facilities.

• Research Organization: Ontario Hydro Research Division, Toronto
• OSTI ID: 5917886
• Report Number(s): CONF-850405-
• Conference Information: Journal Name: Fusion Technol.; (United States) Journal Volume: 8:2
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BUILDING MATERIALS
CANDU TYPE REACTORS
CHALCOGENIDES
COATINGS
COMPARATIVE EVALUATIONS
CONCRETES
DIFFUSION
EPOXIDES
HEAVY WATER MODERATED REACTORS
HYDROGEN ISOTOPES
ISOTOPES
LABELLED COMPOUNDS
LIGHT NUCLEI
MATERIALS
MATERIALS TESTING
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PERMEABILITY
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYAMIDES
POLYMERS
POLYURETHANES
POLYVINYLS
POROSITY
PRESSURE TUBE REACTORS
PROTECTIVE COATINGS
RADIOISOTOPES
REACTORS
SOLUBILITY
SORPTIVE PROPERTIES
SURFACE PROPERTIES
SYNTHETIC MATERIALS
TESTING
THERMAL REACTORS
TRITIUM
TRITIUM COMPOUNDS
TRITIUM OXIDES
YEARS LIVING RADIOISOTOPES