The diffusion of {sup 14}CO{sub 2} through engineered barrier media
The diffusion of {sup 14}CO{sub 2} through crushed tuff, bentonite and a crushed tuff/bentonite mixture was measured for two diffusion lengths. The ability of {sup 14}CO{sub 2} to penetrate a microsilica-containing cement proposed for repository use was also examined. The specimens were subjected to uniaxially-applied compressive loads prior to the diffusion tests to simulate the onset of environmentally-induced microcracks. The results suggest that the presence of a tuff- or bentonite-based backfill would not significantly affect {sup 14}CO{sub 2} release rates from a repository. Conversely, {sup 14}CO{sub 2} diffusion through simulated cement seals can apparently only occur after severe physical damage has been induced. These results may have implications for the ability of a repository to comply with the applicable regulatory release limits for C-14.
- Research Organization:
- Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States); Analysas Corp., Oak Ridge, TN (United States); Purdue Univ., West Lafayette, IN (United States)
- OSTI ID:
- 137515
- Report Number(s):
- CONF-881054-Vol.2; ON: DE89014701; TRN: 89:024208
- Resource Relation:
- Conference: 4. annual DOE model conference, Oak Ridge, TN (United States), 3-7 Oct 1988; Other Information: PBD: 1988; Related Information: Is Part Of 1988 DOE model conference proceedings. Volume 2; PB: 292 p.
- Country of Publication:
- United States
- Language:
- English
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