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Highly Selective Nuclide Removal from the R-Reactor Disassembly Basin at the SRS

TL;DR: In this paper, the results of a deployment of highly selective ion exchange resin technologies for the in-situ removal of Cs-137 and Sr-90 from the Savannah River Site (SRS) R-Reactor Disassembly Basin were described.
Abstract: This paper describes the results of a deployment of highly selective ion-exchange resin technologies for the in-situ removal of Cs-137 and Sr-90 from the Savannah River Site (SRS) R-Reactor Disassembly Basin. The deployment was supported by the DOE Office of Science and Technology's (OST, EM-50) National Engineering Technology Laboratory (NETL), as a part of an Accelerated Site Technology Deployment (ASTD) project. The Facilities Decontamination and Decommissioning (FDD) Program at the SRS conducted this deployment as a part of an overall program to deactivate three of the site's five reactor disassembly basins.

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Journal ArticleDOI
TL;DR: In this paper, the best distribution coefficients, as found using model solutions, were obtained for the samples containing equimolar amounts of manganese dioxide and titania precipitated using K+ as template cation.
Abstract: Hydrous, amorphous MnO2–TiO2 composites demonstrating high affinity towards strontium and uranium at pH = 7 are obtained by means of template synthesis. The best distribution coefficients, as found using model solutions (K d Sr = 55000 mL/g and K d U = 40000 mL/g) and Chernobyl shelter water (K d Sr = 3800 mL/g), are gained for the samples containing equimolar amounts of manganese dioxide and titania precipitated using K+ as template cation.

26 citations


Cites background from "Highly Selective Nuclide Removal fr..."

  • ..., 1996) or collected in some nuclear sites in Russia (Korsakov and Erofeeva, 1996), to those containing trace amounts of 90Sr (Pickett and Malhotra, 2002)....

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  • ...The price for existing sorbents for Sr2+ equals to 50–100 USD per kg (Pickett and Malhotra, 2002)....

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Journal ArticleDOI
TL;DR: In this paper, the applicability of manganese oxide/titanium oxide composites for remediation technologies has been tested, specifically for 90Sr removal from Savannah River Site high-level waste supernatants and Chernobyl 4th Block Shelter water (CSW) simulants.
Abstract: Hydrous, amorphous manganese oxide/titanium oxide composites (AMTO) obtained via template synthesis using alkali metal ions as templates have been characterized. Their applicability in remediation technologies has been tested, specifically for 90Sr removal from Savannah River Site high-level waste supernatants (SHLW) and Chernobyl 4th Block Shelter water (CSW) simulants. Sorption isotherms were used to establish the efficiency of the templating process, while the proton-exchange capacity of AMTO was determined to show that the solids were really protonated. Use of the 90Sr isotope showed that there was little dependence of the distribution coefficients for AMTO on pH, and at pH < 7, i.e., in neutral and acidic media, AMTO had a much greater affinity for strontium than commercial sorbents. Tests with SHLW and CSW simulants revealed that AMTO is capable of removing more than 99% of 90Sr from such wastes. Hence, it could be useful for solving decontamination problems.

16 citations

25 Feb 2003
TL;DR: In this article, the authors describe different applications of highly selective ion exchange media, both commercial fullscale applications and laboratory tests, to give the idea of their efficiency for different liquids.
Abstract: Highly selective inorganic ion exchangers give new possibilities to implement and operate new innovative treatment systems for radioactive liquids. Because of high selectivity these ion exchangers can be used even in liquids of high salt concentrations. Only selected target nuclides will be separated and inactive salts are left in the liquid, which can be released or recategorized. Thus, it is possible to reduce the volume of radioactive waste dramatically. On the other hand, only a small volume of highly selective material is required in applications, which makes it possible to design totally new types of compact treatment systems. The major benefit of selective ion exchange media comes from the very large volume reduction of radioactive waste in final disposal. It is also possible to save in investment costs, because small ion exchanger volumes can be used and handled in a very small facility. This paper describes different applications of these highly selective ion exchangers, both commercial fullscale applications and laboratory tests, to give the idea of their efficiency for different liquids.

9 citations

References
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ReportDOI
01 Apr 1998
TL;DR: In this article, the analytical results of the sampling program conducted in 1997 in the R-Reactor Disassembly Basin are presented, and the primary objective of this paper is to analyze the results of this sampling program.
Abstract: The primary objective of this document is to provide the analytical results of the sampling program conducted in 1997 in the R-Reactor Disassembly Basin.

1 citations