Enclosures (as primary confinement) cont'd

DOE-HDBK-1132-99

Consideration should be given to modular construction, versatility,

relocation, and incorporation of shielding. Structural support should be

provided to accommodate any anticipated loading resulting from

shielding. The type of shielding used and its placement should allow for

adequate fire-fighting access.

Enclosure specifications should address the following standardized features,

where applicable:

Windows and mountings.

Windows should be appropriately sized (and as small as

practicable) and located to provide operators with visual access

to the enclosure interior.

Windows should be constructed of noncombustible or approved

fire-resistant materials.

Resistance of the selected material to impact and radiation

damage should be considered.

The use of MylarTM -glass laminates should be considered for use

as viewing windows and lighting fixture covers in hydrofluoric acid

environments.

Windows should be designed to minimize the risk of releasing

contamination to the working area during window replacement.

Window material should be selected based on specific process,

combustible loading, and radiological safety considerations.

Glove ports (size, location, and height).

Glove ports should be located to facilitate both operations and

maintenance work inside the enclosure.

Gloves should be flexible enough for operating personnel to

access interior surfaces and equipment.

I-13