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Leachability of Decontamination Reagents From Cement Waste Forms.

Published online by Cambridge University Press:  26 February 2011

P. L. Piciulo ,
M. S. Davis  and
J. W. Adams
P. L. Piciulo
Affiliation:
Brookhaven National Laboratory, Nuclear Waste Management Division, Upton, NY 11973
M. S. Davis
Affiliation:
Brookhaven National Laboratory, Nuclear Waste Management Division, Upton, NY 11973
J. W. Adams
Affiliation:
Brookhaven National Laboratory, Nuclear Waste Management Division, Upton, NY 11973
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Abstract

Brookhaven National Laboratory, in order to provide technical information needed by the U.S. Nuclear Regulatory Commission to evaluate the adequacy of near-surface disposal of decontamination wastes, has begun to study the leachability of organic reagents from solidified simulated decontamination wastes. Laboratory scale cement waste forms containing EDTA, picolinic acid or simulated (low oxidation metallic ion) decontamination reagent were leach tested. Samples containing an organic reagent on either mixed bed ion-exchange resins or anion exchange resins were tested. A fixed interval leach procedure was used, as well as the ANS 16.1 standard procedure. The leachability indices measured for the release of the acid from resin/cement composites are: 10.1 for EDTA on mixed bed resins; 9.1 for picolinic acid on mixed bed resins; 9.2 for picolinic acid on anion exchange resins; 8.8 for picolinic acid in forms containing simulated LOMI reagent on mixed bed resins and 8.7 for picolinic acid in forms containing simulated LOMI reagent on anion exchange resins. The leachability indices measured varied with leach time and the data indicate that a simple diffusion model may not be adequate for defining release from these waste forms.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 44: Symposium N – Scientific Basis for Nuclear Waste Management VIII , 1984 , 919
Copyright
Copyright © Materials Research Society 1985

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References

1. ANS 16.1, “Measurement of the Leachability of Solidified Low-level Radioactive Wastes,” American Nuclear Society Standards Committee, (1984). See also Trans. A.N.S. 33, 203–209 (1979).Google Scholar
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3. Piciulo, P. L. and others, Brookhaven National Laboratory, “Decontamination Impacts on Solidification and Waste Disposal, Quarterly Progress Report, October-December 1983,” BNL-NUREG-34277, January 1984.Google Scholar
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