NUMERICAL-EXPERIMENTAL RECOVERY OF POWER DENSITY IN VVER CORE BASED ON MAXIMUM LIKELIHOOD ESTIMATION AND EVALUATION OF ITS QUALITY BY FULL-SCALE VVER-MCU MODEL
23rd Symposium of AER on VVER Reactor Physics and Reactor Safety (2013, Štrbské Pleso, Slovakia)
Reactor physics experiments and code validation (benchmarks)
In-core power distribution calculated with operative code differs up to some point with
self-power neutron detector readings. Maximum likelihood estimation (MLE) give an
opportunity to receive optimal corrections to operative code results. This estimation give as
power distribution consistent with self-power neutron detector readings, so its most probable
deviation from real power production in the core.
The efficiency of this approach is
investigated. As a real core acts full-scale VVER model based on MCU Monte Carlo code,
which produces power distribution in ~2500 nodes of 3D-mesh.