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Revision as of 16:41, 27 May 2019

ATWS is one of the "worst case" accidents, consideration of which frequently motivates the NRC to take regulatory action. The accident could happen if the system that provides a highly reliable means of shutting down the reactor (scram system) fails to work during a reactor event (anticipated transient). They types of events considered are those used for designing the plant.

Source: U.S. Nuclear Regulatory Commission