The use of operator surveys by the CEGB to evaluate nuclear control room design and initiatives in the design of alarm systems and control room operating procedures

The author reports on the use of operator surveys and trip report analysis methods which the Central Electricity Generating Board (CEGB) has developed to assess the extent and adequacy of operator support systems currently installed on its four twin-reactor, first-generation advanced gas-cooled-reactor nuclear power plants. The survey consisted of a program of structured interviews with control room engineers. The scope of the questions addressed encompassed the working environment, communications, man-machine interfaces, procedural information, and the diagnostic and predictive support system. The analysis of trip reports was targeted at identifying aspects of the performance of the operator support systems which might have been contributory to the cause of reactor trip. The results are being used by the CEGB to assist in determining guidelines for the development of operator support systems, computerized controls and the structure of station operating procedures.<>