29th Symposium of AER on VVER Reactor Physics and Reactor Safety (2019, Energoland, Mochovce NPP, Slovakia)
reactor physics experiments and code validation
E. Temesvári, Cs. Maráczy and Gy. Hegyi
tWO Generation III+ VVER-1200 units are planning to be built in Hungary. Investigation of core improvements made for the new reactor type has been done by the vendors however appropriate independent calculation tools are advantageous for the users, among others for strengthening the safety level.
Recently several new VVER reactors have been commissioned; among them three VVER-1200 units. To determine experimentally neutron-physics characteristics of those units almost similar start up test programs were performed by extending them with some new, unconventional measurements, too. Several experiments from the physical start-up of a VVER-1200 were published recently.
This contribution summarizes experience gathered at our institute (MTA EK) with our newly developed KARATE-1200 code system on the basis of the reactivity measurements gained from the literature.