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BASES
BACKGROUND The BUILDING 991 COMPLEX waste container storage areas (except for
(continued) Building996) are provided with Automatic Sprinkler System coverage.
Automatic Sprinkler System A, in part, is a wet pipe system which covers the
heated areas of Building 991 and Building 998 (Room 300 and Comdor A). The
remainder of Automatic Sprinkler System A is a dry pipe system branching off of
the wet pipe portion of Automatic Sprinkler SystemA and covers the
Building 991 East Dock Canopy Area as well as Building 989 (diesel generator
building, not a waste container storage area). Automatic Sprinkler System B is a
dry pipe system and covers Room 170 and the Building 991 West Dock Canopy
Area. Riser System A supports the wet pipe and dry pipe portions of Automatic
Sprinkler System A. Riser System B supports the dry pipe Automatic Sprinkler
System B. The remaining BUZLDING 991 COMPLEX waste container storage
area (ie., Building 996) is provided with a Smoke Detection System but is not
covered by the Automatic Sprinkler Systems.
APPLICATION
TO SAFETY
ANALYSIS
Revision
Scpfcmhcr 1999
The Flow Alarm Transmittal System consists of water-flow switches to detect
Automatic Sprinkler System usage and to send an alarm signal to the Fire
Dispatch Center (Fire Department) and the Central Alarm Station. The Smoke
-
Detecti.j. System, located in some tunnels and vaults, sends an dam signal to the
Fire Department in the Same manner as the sprinkler system flow alarm. Alarm
functions have battery backup capacities of from four (4) to eight (8) hours for
loss of power situations.
Functional performance and maintenance expectations are established for these
systems in Site procedures, which are based on accepted industry standards such
as NFPA 25, Inspection, Testing, and Maintenance of Water-Based Fire
Protection Systems (Ref. A-l), NFPA 72, National Fire Alarm Code (Ref. A-2);
and NFPA 13, Stanhrd for the Installation of Sprinkler Systems (Ref. A-3).
The Automatic Sprinkler System is a recognized control credited in the analysis of
postulakd fire accident scenarios as indicated in Chapter5, Safe9 Structures,
Systems, and Components, of the FSAR. The Flow!”Smoke Detection Alarm
Transmittal Systems E a recognized control EO mitipate fires larger than currently
evaluated in the safetv andvsis.
A-28 Buildins 991 Complex FSAR
Appendix A