Method for adding additional isotopes to actinide-only burnup credit

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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 UO{sub 2} 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 ... continued below

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7 p.

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Lancaster, D.B.; Fuentes, E. & Kang, C. January 1, 1998.

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Description

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 UO{sub 2} 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 UO{sub 2} 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.

Physical Description

7 p.

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INIS; OSTI as DE98001898

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  • 1998 international high-level radioactive waste management conference, Las Vegas, NV (United States), 11-14 May 1998

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  • Other: DE98001898
  • Report No.: DOE/RW/00134--M97-023
  • Report No.: CONF-980516--
  • Grant Number: AC08-91RW00134
  • Office of Scientific & Technical Information Report Number: 642772
  • Archival Resource Key: ark:/67531/metadc693500

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1998

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  • Aug. 14, 2015, 8:43 a.m.

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  • May 18, 2016, 6:04 p.m.

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Lancaster, D.B.; Fuentes, E. & Kang, C. Method for adding additional isotopes to actinide-only burnup credit, article, January 1, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc693500/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.