Departure from nucleate boiling ratio
= Departure from nucleate boiling ratio
{title2=$\mathrm{DNBR}=q''_{\rm crit}/q''$}
The ratio of the heat flux needed to reach <departure from nucleate boiling> to the actual local heat flux. Greater values indicate more margin under the model and correlation used.<Reactor glossary by the United States Nuclear Regulatory Commission>[Departure from nucleate boiling ratio entry]{ref}