Development of a SCALE Tool for Continuous–Energy Eigenvalue Sensitivity Coefficient Calculations

Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831

^* E-mail: perfetticm@ornl.gov

Abstract

Two methods for calculating eigenvalue sensitivity coefficients in continuous-energy Monte Carlo applications were implemented in the KENO code within the SCALE code package. The methods were used to calculate sensitivity coefficients for several criticality safety problems and produced sensitivity coefficients that agreed well with both reference sensitivities and multigroup TSUNAMI-3D sensitivity coefficients. The newly developed CLUTCH method was observed to produce sensitivity coefficients with high figures of merit and low memory requirements, and both continuous-energy sensitivity methods met or exceeded the accuracy of the multigroup TSUNAMI-3D calculations.