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.
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Translated from Atomnaya Énergiya, Vol. 132, No. 5, pp. 251–259, May, 2022.
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Kulikov, V.I., Zhylmaganbetov, N.M., Kavun, O.Y. et al. Computer Simulation of Measurements of VVER-1200 Emergency Protection Efficacy. At Energy 132, 263–271 (2022). https://doi.org/10.1007/s10512-023-00939-y
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DOI: https://doi.org/10.1007/s10512-023-00939-y