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Models and Strategies for Blending Nuclear Wastes to Minimize Immobilized Waste Volume

Published online by Cambridge University Press:  15 February 2011

M. Hoza
M. Hoza*
Affiliation:
Pacific Northwest National Laboratory, Richland, WA 99352, [email protected]
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Abstract

Hanford tank waste will be separated into high-level and low-level portions; each portion will then be vitrified to produce a stable glass form for disposal. Because of the wide variability in the tank waste compositions, blending is being considered as a way to reduce the number of distinct compositions that must be vitrified and to minimize the resultant volume of vitrified waste.

This paper discusses several approaches to blending and models developed to formulate blends for each approach. The models produce optimized blends which minimize the volume of glass required such that all composition and property constraints on the glass are satisfied. The paper will discuss several blending strategies, and will provide the results of calculations comparing the approaches and strategies. Finally, an overall strategy for retrieving, blending, and vitrifying Hanford tank waste will be briefly discussed.

Results of the calculations for high-level waste show that an effective blending strategy can greatly reduce the volume of glass required to immobilize the waste.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 412: Symposium V – Scientific Basis for Nuclear Waste Management XIX , 1995 , 517
Copyright
Copyright © Materials Research Society 1996

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References

1. Hoza, M. 1994. “Multipurpose Optimization Models for High-Level Waste Vitrification”, Proceedings of the International Topical Meeting on Nuclear and Hazardous Waste Management - SPECTRUM '94, American Nuclear Society. La Grange Park, Illinois, pp. 1072–1077.Google Scholar
2. Hrma, P.R., Piepel, G.F., Schweiger, M.J., Smith, D.E., Kim, D.S., Redgate, P.E., Vienna, J.D., LoPresti, C.A., Simpson, D.B., Peeler, D.K., and Langowski, M.H.. 1994. Property Composition Relationships for Hanford High-Level Waste Glasses Melting at 1150°C, PNL-10359, Volumes 1 and 2, Pacific Northwest Laboratory, Richland, Washington.Google Scholar
3. Viswanathan, J. and Grossmann, I.E.. 1990. “A Combined Penalty Function and Outer-Approximation Method for MINLP Optimization.” Computers and Chemical Engineering, 14, 769–782.Google Scholar
4. Brook, A., Kendrick, D., and Meeraus, A.. 1992. GAMS User's Guide. Release 2.25. The Scientific Press, San Francisco, California.Google Scholar
5. Narayan, , Diwekar, V. U.M., and Hoza, M.. 1995. “Synthesizing Optimal Waste Blends”, to be presented at 1995 AIChE Annual Meeting, Miami Beach, Florida.Google Scholar