b'Re-fabrication of Irradiated Fuel Rods and LOCA Burst TestingPrincipal Investigator: L.-Y. Cheng, BNLTeam Members/ Collaborators: M. Todosow and A. Cuadra (BNL)Figure 1. SNAP uncertainty jobO ne aspect of evaluating thethe TRACE accident analyses produced stream steps. performance of accidentresults for calculating the FOM (or tolerant fuel (ATF) underthe response function). The UQ accident conditions is an uncertaintystep computed the FOM value that and sensitivity analysis to identifyconformed to some specifiedand quantify all potentially importanttolerance interval/limit. The SA step parameters that impact the codecalculated correlation coefficients that predicted figure-of-merit (FOM),indicated the relation between input such as the peak cladding temperature(individual sensitivity parameter) and (PCT). A framework to conductoutput (the FOM).uncertainty quantification (UQ) andProject Description: sensitivity analysis (SA) has beenThe analytical effort is to consider established by using the TRACE- uncertainty in the assessment and DAKOTA interface in SNAP (a graphicalcomparison of different fuel and user interface to perform TRACEcladding options under accident runs) and applying it to a previouslyconditions. There are two parts to the developed 3-loop pressurized waterevaluation of fuel performance, UQ reactor (PWR) plant model for theand SA. The UQ process, by statistical assessment of ATF fuel concepts. Usingsampling of results of the accident input models generated by randomanalyses, evaluates the value of the FOM sampling of sensitivity parameters,(e.g., the PCT) such that it satisfies 152 2019|AFC ACCOMPLISHMENTS'