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Title: {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}
}