Power zone control of a nuclear power reactor

Principal stages of elaborating a system of the reactor efficiency zonal adjustment are discussed. Methods are presented as to determination of the number of pickups for the zone controller. A block diagram of the zone control system is given. The main structural difference of this system from the usual automatic efficiency regulator is that there is no rod position synchronization unit and servomotors are autonomously operated from error signal accelerators. The advantages of the efficiency zone control over the usual synchronous regulation are presented, i.e. a higher accuracy of the integral efficiency control, implementation of the efficiency levelling function, easier work for the operator in case of the efficiency variation, higher structural reliability