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PNL-Sandia HLW Package Interactions Test: Phase One

Published online by Cambridge University Press:  15 February 2011

Martin A. Molecke ,
Donald J. Bradley  and
John W. Shade
Martin A. Molecke
Affiliation:
Sandia National Laboratories, Division 4512, Albuquerque, NM 87185
Donald J. Bradley
Affiliation:
Battelle Pacific Northwest Laboratory, Richland, WA 99352
John W. Shade
Affiliation:
Battelle Pacific Northwest Laboratory, Richland, WA 99352
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Abstract

The first phase of a complex high-level waste (HLW) package interactions test in a salt environment has been completed. The test system consisted of PNL 76–68 HLW glass (loaded with inactive fission products and 238U) surrounded by a stainless steel waste canister, a TiCode- 12 overpack, a bentonite/sand backfill, excess brine leachant, and a bedded rock salt container, all heldwithin a 19-liter autoclave. All components were physically compromised in order to force wasteform-barrier-salt interactions to occur during this 95-day, 250°C overtest. Analyses of leachant, wasteform, and all barrier surfaces were performed. Test data included the synergistic effects between barriers and confirmed previous analyses of simpler systems. The glass wasteform exhibited some surface alteration but was not dissolved to any significant degree. The TiCode-12 overpack showed minimal uniform corrosion and no localized attack. Observed mineralogical alteration of the backfill was minimal.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 6: Symposium D – Scientific Basis for Nuclear Waste Management IV , 1981 , 337
Copyright
Copyright © Materials Research Society 1982

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References

REFERENCES

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