Dakota uncertainty quantification methods applied to the NEK-5000 SAHEX model.

Technical Report · Sat Mar 01 04:00:00 UTC 2014

DOI:https://doi.org/10.2172/1155019· OSTI ID:1155019

Weirs, V. Gregory

This report summarizes the results of a NEAMS project focused on the use of uncertainty and sensitivity analysis methods within the NEK-5000 and Dakota software framework for assessing failure probabilities as part of probabilistic risk assessment. NEK-5000 is a software tool under development at Argonne National Laboratory to perform computational fluid dynamics calculations for applications such as thermohydraulics of nuclear reactor cores. Dakota is a software tool developed at Sandia National Laboratories containing optimization, sensitivity analysis, and uncertainty quantification algorithms. The goal of this work is to demonstrate the use of uncertainty quantification methods in Dakota with NEK-5000.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1155019
• Report Number(s): SAND2014-1839; 505233
• Country of Publication: United States
• Language: English