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Sealant Tests to Control Radon Emanation in a Uranium Mine.

Authors
Lindsay-DB; Oberholtzer-JE; Summers-CH
Source
NTIS: PB 83-122762 :90 pages
Link
NIOSHTIC No.
10006558
Abstract
This report describes a field-test program to determine the effectiveness of a polymeric wall sealant to reduce the escape of naturally occurring radioactive gas radon from the walls of an underground uranium mine into the ventilation air. A 75-foot-long, deadend drift with a surface area of about 6,000 ft2 was used as the test site in which the average natural radon flux from the normally dry rock was 16 fci/cm2-s. The effect on radon emanation of wetting the walls with water to a depth of 3 inches was tested, after which the rock was completely covered with a coating of dry-mix concrete to provide a base for the sealant, an acrylic latex. Sealant was applied in two coats to about 0.25 Mm thick. An overall reduction of average radon flux of about 75 pct was achieved. Radon production and other environmental values were measured continuously and automatically by a Bureau of Mines data acquisition system. A commercial microcomputer was programed to convert raw data to engineering units and to perform other useful operations while recording all data on magnetic diskettes. Direct measurements of radon flux from the rock surface were made by a charcoal adsorption technique.
Publication Date
19810101
Document Type
CP; Final Contract Report;
Fiscal Year
1981
NTIS Accession No.
PB83-122762
NTIS Price
A06
Identifying No.
OFR 172-82
Source Name
NTIS: PB 83-122762
Performing Organization
Arthur D. Little, Inc.
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