Remedial Action Plan and site design for stabilization of the inactive uranium mill tailings site at Gunnison, Colorado. Attachment 5, Supplemental radiological data: Final report
Diffusion coefficients for radon gas in earthen materials are required to design suitable radon-barrier covers for uranium tailings impoundments and other materials that emit radon gas. Many early measurements of radon diffusion coefficients relied on the differences in steady-state radon fluxes measured from radon source before and after installation of a cover layer of the material being tested. More recent measurements have utilized the small-sample transient (SST) technique for greater control on moistures and densities of the test soils, greater measurement precision, and reduced testing time and costs. Several of the project sites for the US Department of Energy`s Uranium Mill Tailings Remedial Action (UMTRA) Program contain radiologically contaminated subsurface material composed predominantly of cobbles, gravels andsands. Since remedial action designs require radon diffusion coefficients for the source materials as well as the cover materials, these cobbly and gravelly materials also must be tested. This report contains the following information: a description of the test materials used and the methods developed to conduct the SST radon diffusion measurements on cobbly soils; the protocol for conducting radon diffusion tests oncobbly soils; the results of measurements on the test samples; and modifications to the FITS computer code for analyzing the time-dependent radon diffusion data.
- Research Organization:
- USDOE Albuquerque Operations Office, NM (United States). Uranium Mill Tailings Remedial Action Project Office
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-91AL62350
- OSTI ID:
- 10140859
- Report Number(s):
- DOE/UMTRA-050508-0000-Attach.5; ON: DE93010472
- Resource Relation:
- Other Information: PBD: Oct 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
REMEDIAL ACTION
PLANNING
ABANDONED SITES
SOILS
RADIATION MONITORING
PROGRESS REPORT
COLORADO
MILL TAILINGS
URANIUM
WYOMING
RADIUM 226
THORIUM 230
EXCAVATION
RADON 222
F CODES
054000
540250
540230
HEALTH AND SAFETY
SITE RESOURCE AND USE STUDIES
RADIOACTIVE MATERIALS MONITORING AND TRANSPORT