Extended Forward Sensitivity Analysis for Uncertainty Quantification
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
O4-3 BEPU (Best Estimate code Plus Uncertainty) method, CSAU, Statistical Methods

Haihua Zhao (Idaho National Laboratory)
Vincent Mousseau (Idaho National Laboratory)


This paper presents the extended forward sensitivity analysis as a method to help uncertainty qualification. By including time step and potentially spatial step as special sensitivity parameters, the forward sensitivity method is extended as one method to quantify numerical errors. Note that by integrating local truncation errors over the whole system through the forward sensitivity analysis process, the generated time step and spatial step sensitivity information reflect global numerical errors. The discretization errors can be systematically compared against uncertainties due to other physical parameters. Two well-defined benchmark problems with manufactured solutions are utilized to demonstrate the method.

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