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Title: Depleted uranium as a backfill for nuclear fuel waste package

Abstract

A method is described for packaging spent nuclear fuel for long-term disposal in a geological repository. At least one spent nuclear fuel assembly is first placed in an unsealed waste package and a depleted uranium fill material is added to the waste package. The depleted uranium fill material comprises flowable particles having a size sufficient to substantially fill any voids in and around the assembly and contains isotopically-depleted uranium in the +4 valence state in an amount sufficient to inhibit dissolution of the spent nuclear fuel from the assembly into a surrounding medium and to lessen the potential for nuclear criticality inside the repository in the event of failure of the waste package. Last, the waste package is sealed, thereby substantially reducing the release of radionuclides into the surrounding medium, while simultaneously providing radiation shielding and increased structural integrity of the waste package. 6 figs.

Inventors:
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
675792
Patent Number(s):
5832392
Application Number:
PAN: 8-858,189; TRN: 99:001149
Assignee:
Dept. of Energy, Washington, DC (United States)
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 3 Nov 1998
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; SPENT FUELS; PACKAGING; WASTE FORMS; RADIOACTIVE WASTE DISPOSAL; DEPLETED URANIUM; MATRIX MATERIALS; RADIONUCLIDE MIGRATION; SHIELDING MATERIALS

Citation Formats

Forsberg, C W. Depleted uranium as a backfill for nuclear fuel waste package. United States: N. p., 1998. Web.
Forsberg, C W. Depleted uranium as a backfill for nuclear fuel waste package. United States.
Forsberg, C W. Tue . "Depleted uranium as a backfill for nuclear fuel waste package". United States.
@article{osti_675792,
title = {Depleted uranium as a backfill for nuclear fuel waste package},
author = {Forsberg, C W},
abstractNote = {A method is described for packaging spent nuclear fuel for long-term disposal in a geological repository. At least one spent nuclear fuel assembly is first placed in an unsealed waste package and a depleted uranium fill material is added to the waste package. The depleted uranium fill material comprises flowable particles having a size sufficient to substantially fill any voids in and around the assembly and contains isotopically-depleted uranium in the +4 valence state in an amount sufficient to inhibit dissolution of the spent nuclear fuel from the assembly into a surrounding medium and to lessen the potential for nuclear criticality inside the repository in the event of failure of the waste package. Last, the waste package is sealed, thereby substantially reducing the release of radionuclides into the surrounding medium, while simultaneously providing radiation shielding and increased structural integrity of the waste package. 6 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {11}
}