Emergency Access. Consider access by emergency personnel from the
exterior to ensure that access by emergency personnel will not endanger such
personnel or result in a public hazard, while maintaining any required
confinement or containment using air locks or other features.
Controlled Access . Control access to hazardous areas by means of locked
gates, doors, or other physical barriers to ensure both the safety of personnel
and effective administration and control of facilities.
Access and Egress . Locate support areas (e.g., the radiological control office)
near the exit from the process area for normal and emergency access, egress,
and internal traffic flow. A defect of past designs has been inadequate space at
exit areas for personnel circulation, removal of protective clothing and
equipment, monitoring equipment, and proper egress. Space near the exit area
for temporary storage of maintenance tools and equipment is desirable in some
facilities. Standard design practice is to direct normal routes of egress through
exits that contain monitoring stations.
Chemical Toxicity. Evaluate the need for chemical toxicity protection, as well as
radiation protection, since chemical toxicity exposure will often be the controlling
factor in the event of an accident (for example, when compared to an accident
Equipment Arrangement .
Shop-fabricated tanks should be a maximum of 12 feet in diameter to
permit rail shipment with a preferred ratio of overall length to diameter of
2D to 4D. The maximum ratio of length to diameter is 6D.
Lube oil storage tanks should be located in a fire-rated room fitted with a
sliding fire door or outside if the tanks are over 5,000 gallons. The door
entrance can be elevated to create a diked area within the room capable