Buildings 823 hazards assessment document

The Department of Energy Order 5500.3A requires facility-specific hazards assessments be prepared, maintained, and used for emergency planning purposes. This hazards assessment document describes the chemical and radiological hazards associated with Building 823. The entire inventory was screened according to the potential airborne impact to onsite and offsite individuals. The air dispersion model, ALOHA, estimated pollutant concentrations downwind from the source of a release, taking into consideration the toxicological and physical characteristics of the release site, the atmospheric conditions, and the circumstances of the release. The greatest distance at which a postulated facility event will produce consequences exceeding the Early Severe Health Effects threshold is 274 meters. The highest emergency classification is a General Emergency. The Emergency Planning Zone is a minimum of 275 meters and conforms to natural and jurisdictional boundaries where practical. This is consistent with DOE's Emergency Management Guide