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LSDW speakers are located throughout the Building 991 Complex. A building
amplification system drives the individual speaker-dedicated amplifiers. The LS/DW panel is
located in Room 129. There are location2 within Building 991 where the LSDW system cannot I
be heard. These areas are posted.
2.3.4 Compressed Air System
Compressed air is required for the dry-pipe suppression systems located in the
Building 991 Complex. These areas are the East Dock, Building 989, the West Dock
(Room 170), and the west canopy area. Compressed air is supplied to these systems by either a
compressor in Building 991 (Room 130) or the compressor located in Building 985. Either
compressor has the capacity to supply'the load required by the dry-pipe suppression systems.
The compressor located in Room 130 is normally operated in the manual position and the
control on the air receiver will load the compressor at 80 psi and unload at it at 90 psi. Cooling
water to the after cooler and the compressor is from the DCW system through a backflow
preventer located on the south wall of Room 130 under the after cooler. This water flow is
adjusted to not use excessive water but supply enough cooling. This cooling water flow must be
checked on each tour of the building.
The second compressor, located in Building 985, will start if air pressure falls to 65 psi
and will supply both dry-pipe suppression systems. This unit wil cycle off at 80 psi.
Buildirig985's air compressor capacity is large enough to supply the dry-pipe suppression
systems for short periods of time, but should not be operated for extended periods without
cutting back on air usage. On loss of normal power, the Building 985 compressor is supplied
power from the Building 989 diesel generator.
The air system is in operation continuously and the operating compressor is checked
daily for proper operation.
2.3.5 Utility Systems
2.3.5.1 Electrical Services
Electrical power is supplied to the Site by Public Service Company (PSC) of Colorado
Three main feeds from the PSC transmission grid supply electrical power at 11 5 kilovolt (kV)
Parallel transmission lines from Ralston and Eldorado enter the Site from the east, north of the
Industrial Area. A thrrd feed, &om the United Power Plainview, enters the Site from the west,
south of the Industrial Area. Each of the feeds can be switched to supply the entire Site by
themselves. The Ralston and Eldorado feeds have automatic switching capability while the
Plainview feed has to be manually switched. The electrical power system on site consists of
substations and secondary substations; the main switchgear; the ring bus switchyard; the
overhead and underground electrical distribution lines, buses, support components, and outdoor
lighting; and staff offices and maintenance facilities. All 115 kilovolt (kv) distribution is the
Revision I Building 991 Complex FSAR
Sentcrnber 1995,