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in wooden waste containers and stored under the Building 991 canopy until they can be shipped
off-site. Storage of low-level waste is not permitted in the building.
2.2.12 Building 992
Building 992 is a two-story concrete Guard Post located south of Building 991. The
building is no longer used as a guard post and is normally unoccupied.
2.3 COMPLEX SYSTEMS AND COMPONENTS
System descriptions are provided for the various systems in Building 991. The detail
provided for each system is dependent on the classification of the system based on the hazard
and accident analysis. More detail is provided for those identified System Category (SC)-1/2
and SC-3 SSCs and less for other SSCs . Chapter 5 and Appendix A provide additional details
on the boundaries, support systems and interfaces of the systems, and establishes the functional
requirements and acceptance criteria of the SSCs identified as SC-1/2 and SC-3 SSCs from the
safety analysis in Nuclear Safety Technical Report (NSTR.)-011-98 (Ref. 23).
2.3.1 Fire Suppression, Detection, and Alarm System
This description of the fire suppression, detection, and alarm system in the Building 991
Complex was compiled from information contained in the Fire Hazards Analysis (FHA)
(Ref. 24), walkdowns, and interviews with Operations and Fire Protection personnel.
The automatic sprinkler provides suppression in the event of a large fire. The Limiting
Conditions for Operations (LCO) requirements in the FSAR are applicable to those portions of
the automatic sprinkler system that protect the Building 991 Complex radioactive waste storage
areas and those areas used in the receipt and shipment of radioactive waste containers. These
areas contain significant quantities of source term materials (material-at-risk (MAR)) that could
result in release of contamination during a fire. As discussed in this FSAR, these areas are
protected by Riser Systems A and B. Riser System A also provides fire suppression to areas that
do not provide radioactive waste storage or receiptlshipment of radioactive waste. This includes
the Building 991 basement, the office area, the Building 991 roof plenum deluge system, and
Building 989. The fire detection and alarm system provides detection of fire, actuation of an
automatic suppression system, and transmittal of alarm to the Central Alarm Station (CAS) and
Fire Dispatch Center (FDC).
The fire suppression, detection, and alarm systems in the Building 991 Complex include
the following systems and are discussed below:
Fire water supply
Automatic sprinkler systems
Deluge systems
Heat Detection System
Revision Building 991 Complex FSAR
September 1999
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