Determining Importance Weighting Functions for Contributon Theory Eigenvalue Sensitivity Coefficient Methodologies

Conference · Sun Jan 01 00:00:00 EST 2012

OSTI ID:1039617

Perfetti, Christopher M ^[1]; Martin, William R ^[2]; Rearden, Bradley T ^[1]; Williams, Mark L ^[1]

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1. ORNL
2. University of Michigan

This study introduced three approaches for calculating the importance weighting function for Contributon and CLUTCH eigenvalue sensitivity coefficient calculations, and compared them in terms of accuracy and applicability. The necessary levels of mesh refinement and mesh convergence for obtaining accurate eigenvalue sensitivity coefficients were determined through two parametric studies, and the results of these studies suggest that a sufficiently-accurate mesh for calculating eigenvalue sensitivity coefficients can be obtained for the Contributon and CLUTCH methods with only a small increase in problem runtime.

• 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: 1039617
• Resource Relation: Conference: PHYSOR 2012, Knoxville, TN, USA, 20120415, 20120420
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
ACCURACY
CONVERGENCE
EIGENVALUES
SENSITIVITY
WEIGHTING FUNCTIONS
Eigenvalue sensitivity coefficients
TSUNAMI
Monte Carlo
Scale
SHIFT
CLUTCH
continuous-energy