{sup 129}I{sup -} and {sup 99}TcO{sub 4}-scavengers for low level radioactive waste backfills
Abstract
Minimization of {sup 129}I{sup -} and {sup 99}TcO{sub 4}{sup -} transport to the biosphere is critical to the success of low level radioactive waste (LLRW) storage facilities. Here we experimentally identify and classify optimal sorbent materials for inclusion in LLRW backfills. For low pH conditions (pH 4-5), Cu-sulfides and possibly imogolite-rich soils provide K{sub d}`s (surface-solution partition coefficients) of roughly 10{sup 3} ml g{sup -1} for iodide, and 10{sup 2} ml g{sup -1} for technetium. At near neutral pH, hydrotalcites, Cu-oxides, Cu-sulfides and lignite coal possess K{sub d}`s on the order of 10{sup 2} ml g{sup -1} for both iodine and technetium. At high pH (pH > 10), such as might occur in a cementitious LLRW facility, calcium monosulfate aluminate K{sub d}`s are calculated to be roughly 10{sup 2} ml g{sup -1} for both iodine and technetium.
- Authors:
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE Office of Energy Research, Washington, DC (United States)
- OSTI Identifier:
- 475667
- Report Number(s):
- SAND-95-2978
ON: DE97004748; TRN: 97:010939
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: PBD: Mar 1997
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 05 NUCLEAR FUELS; LOW-LEVEL RADIOACTIVE WASTES; UNDERGROUND DISPOSAL; RADIOACTIVE WASTE STORAGE; BACKFILLING; IODINE; SCAVENGING; TECHNETIUM; CEMENTS; SORPTIVE PROPERTIES; PERFORMANCE; RADIOACTIVE WASTE FACILITIES
Citation Formats
Balsley, S D, Brady, P V, Krumhansl, J L, and Anderson, H L. {sup 129}I{sup -} and {sup 99}TcO{sub 4}-scavengers for low level radioactive waste backfills. United States: N. p., 1997.
Web. doi:10.2172/475667.
Balsley, S D, Brady, P V, Krumhansl, J L, & Anderson, H L. {sup 129}I{sup -} and {sup 99}TcO{sub 4}-scavengers for low level radioactive waste backfills. United States. https://doi.org/10.2172/475667
Balsley, S D, Brady, P V, Krumhansl, J L, and Anderson, H L. 1997.
"{sup 129}I{sup -} and {sup 99}TcO{sub 4}-scavengers for low level radioactive waste backfills". United States. https://doi.org/10.2172/475667. https://www.osti.gov/servlets/purl/475667.
@article{osti_475667,
title = {{sup 129}I{sup -} and {sup 99}TcO{sub 4}-scavengers for low level radioactive waste backfills},
author = {Balsley, S D and Brady, P V and Krumhansl, J L and Anderson, H L},
abstractNote = {Minimization of {sup 129}I{sup -} and {sup 99}TcO{sub 4}{sup -} transport to the biosphere is critical to the success of low level radioactive waste (LLRW) storage facilities. Here we experimentally identify and classify optimal sorbent materials for inclusion in LLRW backfills. For low pH conditions (pH 4-5), Cu-sulfides and possibly imogolite-rich soils provide K{sub d}`s (surface-solution partition coefficients) of roughly 10{sup 3} ml g{sup -1} for iodide, and 10{sup 2} ml g{sup -1} for technetium. At near neutral pH, hydrotalcites, Cu-oxides, Cu-sulfides and lignite coal possess K{sub d}`s on the order of 10{sup 2} ml g{sup -1} for both iodine and technetium. At high pH (pH > 10), such as might occur in a cementitious LLRW facility, calcium monosulfate aluminate K{sub d}`s are calculated to be roughly 10{sup 2} ml g{sup -1} for both iodine and technetium.},
doi = {10.2172/475667},
url = {https://www.osti.gov/biblio/475667},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Mar 01 00:00:00 EST 1997},
month = {Sat Mar 01 00:00:00 EST 1997}
}