Skip to main content

The NRC is modernizing nrc.gov with an updated design and improved navigation to enhance usability. We are committed to a smooth transition and will work to minimize any disruption. The site may be briefly unavailable at times during launch. Thank you for your patience.

Departure from nucleate boiling ratio (DNBR)

The ratio of the heat flux needed to cause departure from nucleate boiling to the actual local heat flux of a fuel rod.

Page Last Reviewed/Updated Thursday, August 27, 2026

Page Last Reviewed/Updated Thursday, August 27, 2026