Fire Suppression System

DOE-HDBK-3010-94

Appendix B; H-21 TRU Waste Facility

4.1.3.2 F ire S u p p ression S ystem

The H-21 fire protection system is a wet-pipe sprinkler system employing automatic heat-

activated sprinklers in the overhead designed to actuate at 100 C. Activation of the

sprinkler sounds a building-wide audible alarm and also triggers an alarm at the local fire

station. The H-21 facility fire protection system is not seismically qualified.

4.1.3.3 E lectrical P ow er D istrib u tion

The H-21 facility is provided with normal power received from a local utility. No backup or

redundant power is available. The building grounding system serves two functions. As the

building electrical ground, it provides a path to ground for electrical faults, affording

additional protection along with breakers and fuse blocks and allowing "bleedoff" of static

electrical charges. Its second function is to provide a conducting path to ground in the event

of lightning strike.

4.1.3.4 D om estic W ater

Domestic, industrial, and fire-fighting water is drawn from a 30.5 cm cast iron water main

extending from the south. Effluent from this system is disposed of through the sewage

system.

4.1.4 R eal-T im e R ad iograp h y U n it

The RTR unit is a filmless radiography machine operating at approximately 420 kV and

10 mA. Trained RTR personnel view the real-time X-rays which are displayed on a

television monitor. RTR personnel look for wave motion on the X-ray display which is the

indicator of free liquids within the waste drums. The X-ray images are videotaped to create

a permanent record as drums are scanned.

Drums undergoing RTR examination are placed on a cart and positioned inside a shielded

room. The X-ray tube and imaging system are located on opposite sides of the shielded

room and are positioned to scan the drum. The tube and imaging system remain fixed in

position while the cart is mechanically jostled. Safety interlocks prevent the X-ray tube from

operating if a shielded door is open. The unit is operated remotely from the RTR control

panel located in the facility office area.

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