Influence of automatic regulator parameters on power transition processes of the IBR-2 reactor

Using a model of the IBR-2 reactor based on the block structure with z-transformation of constants and experimentally determined feedback parameters, power transition processes have been evaluated at di€erent values of the parameters of the automatic power regulator (APR). It has been shown that, at regular reactivity excitations, the best transition processes correspond to higher APR rates at the elimination of the APR smoothing unit. The recom- mendations are given for choosing the APR parameters when at normal operation of the IBR- 2 reactor there are random reactivity excitations.