Abstract
Two efficient algorithms for estimation of the assemblywise Power distribution on WWER type reactors are presented. The algorithms combine reference code pre-calculations with aposteriori corrections based on temperature measurements at the reactor core outlet. An adaptive multiplicative correction function and a quadratic performance criterion are used. The problem for estimation of the unknown coefficients in the correction function is solved in two ways: (a) using a recursive stochastic approximation algorithm, and (b) by a least squares algorithm with singular value decomposition techniques. The two algorithms were run with sets of measured data in order to provide results for a comprehensive comparison of their accuracy, efficiency and stability with respect to measurement errors. One of the presented procedures is implemented in a computerized power shape monitoring subsystem at the Kozlodui NPP.
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