Which statement about DBA is true?

Which statement about DBA is true?

• A. DBA is not used in design
• B. DBA is the least critical accident
• C. DBA is only used in post-accident analysis
• D. DBA is the specification to which a plant is designed

Answer: (D)

Design Basis Accident defines the set of events and conditions a nuclear plant must be designed to handle while maintaining safety performance. It acts as the design specification for the plant, guiding how systems, structures, and components are sized, arranged, and permitted to respond so that safety limits (cooling, containment, post-shutdown responses) are met under those postulated conditions. In other words, the design is built around meeting the acceptance criteria established by the design basis, making this option the correct description. This concept is not about post-accident analysis alone, nor about ranking accidents by importance, and it’s not something separate from the design process. It’s the foundation used during design to ensure the plant can safely respond to the specified initiating events.

Design Basis Accident defines the set of events and conditions a nuclear plant must be designed to handle while maintaining safety performance. It acts as the design specification for the plant, guiding how systems, structures, and components are sized, arranged, and permitted to respond so that safety limits (cooling, containment, post-shutdown responses) are met under those postulated conditions. In other words, the design is built around meeting the acceptance criteria established by the design basis, making this option the correct description.

This concept is not about post-accident analysis alone, nor about ranking accidents by importance, and it’s not something separate from the design process. It’s the foundation used during design to ensure the plant can safely respond to the specified initiating events.