Space Allotment cont'd

DOE-HDBK-1132-99

Physically separate storage facilities for radioactive materials from

process operations, areas for the storage of nonnuclear materials or

equipment, and functions not directly required for storage operations.

Provide suitable physical compartmentalization, to limit the quantities of

stored materials in each compartment to safe levels.

Generally, establish a clear height of 9 feet, with floor-to-floor height not

exceeding 12 feet except where specific functions require special

ventilation systems or where high-bay space is required for engineering

development, semi-works, other equipment, or similar functional use.

Where economical, use suspended ceilings to reduce HVAC loads and

energy costs, to provide required acoustical properties, and to facilitate

the maintenance of acceptable levels of cleanliness.

Where an acceptable working environment can be provided by careful

layout of exposed framing, piping, and ducts, design roof or overhead

floor construction to eliminate the need for ceiling finish (other than

painting) or applied or integral acoustical treatment.

Provide vertical chases with suitable access doors or removable panels

for access to valves, dampers, and other equipment.

Isolate compressed gas cylinders in a special hazardous materials

storage room on an outside wall of the facility building with separate

ventilation and access from outside and inside the building.

Design facility layout to provide specific control and isolation of quantities

of flammable, toxic, and explosive gases, chemicals, and other

hazardous material admitted to the facility.

When designing for a radioactive environment, provide additional space

for temporary shielding or for additional shielding in the event radiation

levels are higher than anticipated.

II-4