Method of measuring core reactivity and checking its validity

摘要

A smart reactivity computer is disclosed that processes signals from multiple neutron detectors to generate regional values of core reactivity that are supplied to a strip chart recorder. When the regional values are coincident for a time duration sufficient to satisfy a statistical fit test to a straight line, the computer alerts the operator and determines control rod worth by first fitting a straight line to the coincident portion of the reactivity values. The computer then determines intersections between the straight line and the reactivity value lines produced when the control rods are moved on both ends of the straight line. The difference between intersections for.a single control rod movement line determines control rod worth for that movement.