Method for adding additional isotopes to actinide-only burnup credit [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy. Office of Civilian Radioactive Waste Management, 1998.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 7 pages : digital, PDF file
Additional Creators:: United States. Department of Energy. Office of Civilian Radioactive Waste Management and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

The Topical Report on Actinide-Only Burnup Credit for Pressurized Water Reactor Spent Nuclear Fuel Packages requires computer code validation to be performed against a benchmark set of chemical assays for isotopic concentration and against a benchmark set of critical experiments for package criticality. Both sets contain all the isotopes included in the methodology. The chemical assays used include the uranium and plutonium isotopes, while the critical experiments were composed of UO₂ or MOX rods, covering the isotopes in the actinide only approach. Since other isotopes are not included in the validation benchmark sets, it would be necessary to justify both the content and worth of any additional isotope for which burnup credit is to be taken (i.e., both the concentration and criticality effect of each particular isotope must be validated). A method is proposed here that can be used for any number of additional isotopes. As does the actinide-only burnup credit methodology, this method makes use of chemical assay data to establish the conservatism in the prediction of each isotope`s concentration. Criticality validation is also performed using a benchmark set of UO₂ and MOX critical experiments, where the additional isotopes are validated using worth experiments to conservatively account for any uncertainty in their cross sections. The remaining requirements (analysis and modeling parameters, loading criteria generation, and physical implementation and controls) are performed exactly as described in the actinide-only burnup credit methodology. This report provides insight into each particular requirement in the new methodology.

Report Numbers:

E 1.99:doe/rw/00134--m97-023
E 1.99: conf-980516--
conf-980516--
doe/rw/00134--m97-023

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Note:

Published through SciTech Connect.
01/01/1998.
"doe/rw/00134--m97-023"
" conf-980516--"
"DE98001898"
1998 international high-level radioactive waste management conference, Las Vegas, NV (United States), 11-14 May 1998.
Lancaster, D.B.; Kang, C.; Fuentes, E.
TRW Environmental Safety Systems Inc., Vienna, VA (United States)

Funding Information:

AC08-91RW00134

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