ESTIMATION OF OPERATING FACTORS AND ERRORS OF MODEL INFLUENCE ON PRECISION OF "KRUIZ" SOFTWARE POWER DISTRIBUTION REBUILDING ALGORITHM ON THE EXAMPLE OF UNIT 4 ROVNO NPP
17th Symposium of AER on VVER Reactor Physics and Reactor Safety (2007, Yalta, Crimea (Ukraine, back then))
CORE SURVEILLANCE AND MONITORING. CFD ANALYSIS
General overview of power distribution rebuilding algorithm, that implemented in ?Kruiz? software, is given in the report. This algorithm is based on join solution of measurements equations and neutron physics model of reactor core. Influence of some operating factors and errors of model on the power distribution rebuilding precision is estimated. Examples of the power distribution rebuilding are given using model power distribution calculated by independent codes. It is shown that the measurement accuracy gives the main contribution into the accuracy of power distribution rebuilding. Results of power distribution rebuilding algorithm verification obtained during the operation Rovno NPP unit 4 are shown.