B. Hussain et al., STUDY OF MOV OPERATOR AND MOTOR CHARACTERISTICS TO DETERMINE TORQUE CAPABILITY, IEEE transactions on nuclear science, 42(6), 1995, pp. 2271-2274
Motor operated valves (MOV's) used in the nuclear generating stations
require the high torque capability of a motor when demanded during an
accident scenario, This paper specifically deals with the behavior and
classification of motors used in ac MOV's, This paper also deals with
a methodology that may be consistently applied to determine the reali
stic capability (that is, rating) of the motor/operator, As an ongoing
resolution to the NRC IEB 89-10 issue of the impact of degraded volta
ge condition and other environmental conditions on torque capability o
f the MOV's, the determination of appropriate motor torque capability
is essential.