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Development and Evaluation of Radon Sealants for Uranium Mines.

UCRL51818

Publication Date	1975
Personal Author	Hammon, H. G.; Ernst, K.; Gaskill, J. R.; Newton, J. C.; Morris, C. J.
Page Count	72
Abstract	Coatings for use as radon barriers were evaluated. Coating materials evaluated included epoxy resins, furfuryl alcohol polymers, styrenated polyesters, polyvinyl acetate, and acrylic emulsions. It was calculated that virtually all coatings with permeation constants lower than 10 exp -10 cm exp 3 /sub STP/ . cm/s . cm exp 2 .cm Hg and thicknesses between 5 and 10 mil will provide nearly 100 percent effectiveness. The selection of a suitable coating then ought to be based on other factors such as cost/m exp 2 , vapor toxicity during application, ability to bind to the uranium ore in continuous films free of pin-holes etc. Obviously, any openings in the mine shafts and tunnels which are not covered with a film or any discontinuities of the film will act like the spillway on a water dam, i.e., the radon contained behind the barrier will flow out into the tunnel.
Keywords	Epoxides Radon isotopes Polymers Barrier coatings Containment Uranium mines Sealing materials Coatings Cost Porosity Radiation protection
Source Agency	US Energy Research and Development Administration
NTIS Subject Category	71B - Adhesives & Sealants 77F - Radiation Shielding, Protection, & Safety 48A - Mineral Industries
Corporate Authors	California Univ., Livermore Lawrence Livermore Lab.
Document Type	Technical Report
NTIS Issue Number	197523
Contract Number	H0232047 W-7405-ENG-48

Development and Evaluation of Radon Sealants for Uranium Mines.

Development and Evaluation of Radon Sealants for Uranium Mines.
UCRL51818

Publication Date	1975
Personal Author	Hammon, H. G.; Ernst, K.; Gaskill, J. R.; Newton, J. C.; Morris, C. J.
Page Count	72
Abstract	Coatings for use as radon barriers were evaluated. Coating materials evaluated included epoxy resins, furfuryl alcohol polymers, styrenated polyesters, polyvinyl acetate, and acrylic emulsions. It was calculated that virtually all coatings with permeation constants lower than 10 exp -10 cm exp 3 /sub STP/ . cm/s . cm exp 2 .cm Hg and thicknesses between 5 and 10 mil will provide nearly 100 percent effectiveness. The selection of a suitable coating then ought to be based on other factors such as cost/m exp 2 , vapor toxicity during application, ability to bind to the uranium ore in continuous films free of pin-holes etc. Obviously, any openings in the mine shafts and tunnels which are not covered with a film or any discontinuities of the film will act like the spillway on a water dam, i.e., the radon contained behind the barrier will flow out into the tunnel.
Keywords	Epoxides Radon isotopes Polymers Barrier coatings Containment Uranium mines Sealing materials Coatings Cost Porosity Radiation protection
Source Agency	US Energy Research and Development Administration
NTIS Subject Category	71B - Adhesives & Sealants 77F - Radiation Shielding, Protection, & Safety 48A - Mineral Industries
Corporate Authors	California Univ., Livermore Lawrence Livermore Lab.
Document Type	Technical Report
NTIS Issue Number	197523
Contract Number	H0232047 W-7405-ENG-48