TASK-ANALYSIS IN SUPPORT OF THE DESIGN AND DEVELOPMENT OF A NUCLEAR-POWER-PLANT SAFETY SYSTEM

The application of task analysis to assess the adequacy of a proposed design for an independent feed system for use on a number of nuclear power stations is described. The objectives of the analysis are identified and the methodology to achieve these objectives is developed. The analysis examines the demands made upon station operations staff to commission the proposed feed system. The impact of potential operator error and adverse environmental conditions on commissioning time is considered. The results of the analyses and their input into the design process are summarized. A subsequent comparison between the results of the analysis and a demonstration on an installed system is described and differences discussed. Finally the relative merits of computer-based task simulation techniques in this type of exercise are considered.