Air Sampling Systems - h3010v20233

DOE-HDBK-3010-94

Appendix B; Production Support Lab

detection alarm setpoints. A dedicated set of thermal detectors in gloveboxes and rooms are

used to provide initiation input to the sprinkler system, which is equipped with fusible links

in the process areas as a backup means of initiation. Nozzle arrangement in the system is in

accordance with NFPA standards and will blanket a room as well as directing spray to

glovebox walls.

A thermal detector-activated deluge system is available for all HEPA plenums as well. This

system actuates when air temperature coming to the plenum is above 180 F, providing a

continual spray of firemain water upstream of the HEPA plenums. Series demisters are

available to protect the plenum from a large flow of water drops. This system and any of the

sprinkler systems can be activated manually as well.

3.1.5.6 A ir S am p lin g S ystem s

There are two air sampling systems in the lab, a high- and a low-volume system. The high-

volume system has 16 units in the analytical rooms themselves and an additional 10 exhaust

duct samplers. Each of these units draws 30 cfm. There are also 25 low-volume air

samplers designed to detect airborne contamination in airlocks, regulated corridors, utility

areas, etc. These units draw 5 cfm. Both systems use impaction collection and

photomultiplier tube detection and provide local audio and visual alarms. Only the high-

volume system, however, provides remote alarm capability to the data logger in the facility

utility control room. The motive force for both the low- and high-volume air samplers is one

of two centrifugal exhausters located in the HEPA plenum room. These units discharge into

the central facility exhaust duct downstream of the main exhaust fans.

There are also two low-volume air samplers downstream of the HEPA filters for each

plenum. These units have remote alarm capability in the utility room as well. Continuously

on-line filter media particulate samplers are provided for stack exhaust as well. These media

are manually collected and sampled at prescribed intervals.

3.1.5.7 C old C h em ical S torage an d S u p p ly

Cold (i.e., not radioactively contaminated) liquid feed chemicals are kept in storage

compartments in the analytical rooms themselves. The compartments are normally cabinets

with locking doors except for the flammable liquid storage cabinets, which are constructed in

accordance with NFPA and RCRA requirements.

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