부산대학교 도서관

The ratio of the reactivity calculated from the solution of a conditionally critical problem for the neutron flux density and the reactivity obtained using the measured values of the ionization-chamber currents. The efficacy of the emergency protection was measured at reactor startup of the Nos. 6 and 7 power units of the Novovoronezh NPP and No 5 unit of the Leningrad NPP. The ionization chambers are situated in the biological-protection concrete. The measured and calculated values of the efficiency of the emergency protection are compared using the results of design modeling based on calculations of the ionization-chamber currents. The measured values of the quantities are compared with the calculated values.
UDC 621.039.56 The nuclear safety rules for NPP reactor installations require testing (measurements) of the neutronic characteristics of the core, in particular, the efficacy of the emergency protection, at reactor [...]