closure project manager - Document Request - U.S. Department of ...

Pump
P-7
Configuration
This pump supplies the preheat coils on S-1, S-2, S-3, S-4 and S-5. P-7 is controlled by an
outside air sensor (T-21) located on the north wall of Room 137. T-21 will star& P-7 at an
outside temperature of less than 70°F.
Due to the many alterations to Building 991 over the years there is duplication in
equipment numbering. The pumps numbered P-1 through P-7, as discussed above, are all
located in Room 137 along the south and west walls. The preheat coil pumps, numbers P-1
through P-5 and discussed in Section 2.3.2.1, are all located by their respective supply plenums.
On loss of normal power, pumps P-5 and P-7 in Room 137, can be supplied with power
from the Building 989 diesel generator. An interruption of power will cause the starters for
these pumps to open and the start buttons will have to be pressed to restart the pumps. The
pumps should provide enough circulation to prevent freezing. during power outages during
freezing weather.
2.3.2.4 WAC Chilled Water System
A multiple compressor unit located in Room 130 supplies chilled water to the S-3
system. A cooling water sump and circulating pump, located in Room 130, provide condensing
water and a chilled water pump, located by the unit, circulated chilled water through the chiller
and to the S-3 plenum and to the coil units in the south end of the building. Chilled water pump
P-8 circulates water through a three-way valve and the coil in S-3 plenum for cooling. A
pneumatic controller in the S-3 control cabinet modulates the three-way valve to maintain fan
discharge of 55°F.
Chilled water is supplied to the fan coil units located in Rooms 101 through 122. Each
unit has a multiple speed fan with a control by the unit. By varying the speed of the fan the
desired level of cooling for the space is attained. The room thermostats in this area do not
control anything in this system. A chilled water controller in the control cabinet operates the
compressors to maintain a chilled water temperature of 45°F. The system is manually operated
and is started as required during the spring, summer and fall months.
2.33 Life Safety/Disaster Warning System
The Building 991 Complex Life SafetyDisaster Warning (LS/DW) System provides
annunciation to building workers for emergency response actions and general building
announcements. The LS/DW system is a multiple-input, Site-wide, public address system. The
LSDW system in the Building 991 Complex is used to make emergency announcements and to
alert personnel of hazardous situations, such as airborne contamination, fires, emergency
response activities, or impending natural disasters. The microphone input is located close to the
building entrance in Room 113. Continuously playing music and Site-wide announcements are
generated from the CAS in Building 121. The CAS dispatcher can selectively communicate
with individual buildings or the entire Site via an intercom system.
Revision L
Smlcmhcr 1999
Building 991 Complex FSAR