Computation and experimental research on dummy No. 1 of a WWER-440 reactor with shielding assemblies using the LR-0 facility

A dummy which models a section of the WWER-440 reactor, viz. from the reactor core centre to the biological shielding, was set up on the LR-0 test facility. Models of shielding assemblies for radiation protection of WWER-440 vessels are placed at the periphery of the dummy reactor core. Performed were measurements of the dummy's reactor core (critical parameters and reactivity coefficients, relative power distribution, power in absolute units) and differential and activation measurements of the neutron field characteristics (in the thermal energy range and above 10 keV) in various points of the reactor core and around the vessel of the dummy. Complex calculations were performed and the results compared with experimental data. (author)