ACTUAL - computer code for analysis of measured values of in-core sensor signals and for updating constants of in-core monitoring system of reactor V-213 of WWER-440 nuclear power plant

The structure is described of computer code ACTUAL. The methods are discussed of instrumentation diagnostics, of testing the likelihood of measured values of signals from sensors, and of physical testing of measured quantities. Basic methods are presented for determining the coolant output temperature for fuel assemblies without thermoelectric transducers, for updating the coefficients for interpretation of the measured self-powered detector signals, and for calculating the basic parameters of the reactor core. (author). 2 figs., 1 tab., 7 refs