TSUNAMI Primer: A Primer for Sensitivity/Uncertainty Calculations with SCALE

Technical Report · Thu Jan 01 00:00:00 EST 2009

DOI:https://doi.org/10.2172/947598· OSTI ID:947598

Rearden, Bradley T ^[1]; Mueller, Don ^[1]; Bowman, Stephen M ^[1]; Busch, Robert D. ^[2]; Emerson, Scott ^[2]

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1. ORNL
2. University of New Mexico, Albuquerque

This primer presents examples in the application of the SCALE/TSUNAMI tools to generate k{sub eff} sensitivity data for one- and three-dimensional models using TSUNAMI-1D and -3D and to examine uncertainties in the computed k{sub eff} values due to uncertainties in the cross-section data used in their calculation. The proper use of unit cell data and need for confirming the appropriate selection of input parameters through direct perturbations are described. The uses of sensitivity and uncertainty data to identify and rank potential sources of computational bias in an application system and TSUNAMI tools for assessment of system similarity using sensitivity and uncertainty criteria are demonstrated. Uses of these criteria in trending analyses to assess computational biases, bias uncertainties, and gap analyses are also described. Additionally, an application of the data adjustment tool TSURFER is provided, including identification of specific details of sources of computational bias.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 947598
• Report Number(s): ORNL/TM-2009/027; DP0902090; DPDP097
• Country of Publication: United States
• Language: English