Safety zone radius
n. The radius of a circular safety zone just large enough to protect firefighting personnel from radiant heat injury.
Safety zone radius is an output computed in the BehavePlus fire modeling system based on the Butler and Cohen (1998) safety zone model. Safety zone radius is the separation distance plus the radius of a circle that fits all personnel and equipment that will occupy the safety zone. This core area represents the only safe area of the safety zone; outside the core area persons may receive burns.