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Development of Emergency Procedures for Nuclear Power Plants

The accident at the Three Mile Island Plant led to a number of studies that addressed the operability and safety of most nuclear reactors. Problems related to human factors were suggested as the real or potential causes of error in many of these studies. In response to these studies, the U.S. Nuclear Regulatory Commission (NRC) published a plan (NUREG/CR-1278) which identifies the need for good emergency procedures and the need to incorporate good human factors practices into these procedures. To characterize the problems associated with emergency procedures: prior to the emergency procedure reviews they generally contained a large number of operator actions, some of which were arbitrary in sequence and some of which required extensive decisionmaking on the part of the operator without proper guidance to support decision-making; the proper execution of the tasks was always self-evident; and the procedures were often not written, organized and formatted to communicate the author's intentions.