United States Nuclear Regulatory Commission - Protecting People and the Environment

FRAPCON-3 Updates, Including Mixed-Oxide Fuel Properties (NUREG/CR-6534, Volume 4)

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Publication Information

Manuscript Completed: May 2005
Date Published:
May 2005

Prepared by:
D. D. Lanning, C. E. Beyer, K.J.Geelhood

Pacific Northwest National Laboratory
Richland, WA 99352

Prepared for:
Division of Systems Analysis and Regulatory Effectiveness
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

NRC Job Code Y6586

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Abstract

The FRAPCON-3 code has been altered by a number of additions to form version FRAPCON-3.3. The major changes include an improved model for the urania fuel pellet thermal conductivity; the addition of mixed plutonia-urania oxide (MOX) fuel pellet thermal properties and other parameters to facilitate analysis of MOX fuel rod performance; and the addition of corrosion and hydrogen pickup parameters appropriate to advanced cladding types. This volume contains descriptions and discussions of these and other revisions.

The document also contains code-data comparisons of MOX fuel temperatures used to verify the MOX fuel pellet thermal conductivity model, and similar comparisons for urania fuel rods. The total sequence of code revisions that have led from the last-published version of FRAPCON-3 (NUREG/ CR-6534, Volume 2, 1997) to the latest issued version, FRAPCON-3.3, is also given.

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