Containment Structures of U.S. Nuclear Power Plants: Background, Regulations, Codes and Standards, and Other Considerations
7 Containment System Challenges Under Severe Accidents
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The Nuclear Regulatory Commission (NRC) defines three types of reactor accidents that have to be addressed to ensure public health and safety; (1) design basis accidents, (2) beyond design basis accidents and (3) severe accidents. A design basis accident is a postulated accident that a nuclear facility must be designed and built to withstand without loss to the systems, structures, and components necessary to ensure public health and safety. Loss of coolant accidents (LOCAs) are those postulated accidents that result from the loss of reactor coolant at a rate that is in excess of the capability of the reactor coolant...