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Adjoint Sensitivity Analysis of the RELAP5/MOD3.2 Two-Fluid Thermal-Hydraulic Code System - I: Theory

D. G. Cacuci, M. Ionescu-Bujor

Nuclear Science and Engineering

Volume 136 / Number 1 / September 2000 / Pages 59-84


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This work presents the implementation of the Adjoint Sensitivity Analysis Procedure for the nonequilibrium, nonhomogeneous two-fluid model, including boron concentration and noncondensable gases, of the RELAP5/MOD3.2 code. The end product of this implementation is the Adjoint Sensitivity Model (ASM-REL/TF), which is derived for both the differential and discretized equations underlying the two-fluid model. The consistency requirements between these two representations are also highlighted.

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