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3./4. LIMITING CONDITIONS FOR OPERATION AND SURVEILLANCE
REQUIREMENTS
3.U4.1 BUILDING 991 COMPLEX AUTOMATIC SPFUNKLER SYSTEMS AND
FLOW/SMOKE DETECTfOY ALARMS
BASES
BACKGROUND The BUILDING 991 COMPLEX handles and stores low-level waste (LLW) and
TRU waste containers (including pipe overpack containers (POCs)) of various
types. All POC containers are packaged in robust metal containers that are not
susceptible to fire damage. All of the other waste containers inside the buildings
are metal dnuns or metal crates. Wooden LLW. crates are permitted to be stored
outside of the buildings in areas covered by the Automatic Sprinkler System. The
BUILDING 991 COMPLEX also handles and stages Type B shipping containers
holding SNM for off-site shipment. All SNM containers are packaged in robust
metal containers that are not susceptible to fire damage.
The combustible 10- in the interior waste container storage areas of the
BUILDING 991 COMPLEX is minimal, consisting of drum-protecting plywood
sheets between drum tops and metal pallets in stacked drum configurations,
crate-protecting plastic covers between stacked metal crates, and limited transient
combustible materials. Wooden pallets are not permitted to be used for waste
container storage in the BUILDING 991 COMPLEX. Exterior waste container
storage areas of the BUILDING 991 COMPLEX potentially have a higher
combustible loading (e.g., empty wooden crates, wooden LLW crates).
Fires impacting waste containers were evaluated in the FSAR Safety Analysis.
The analysis evaluated fires initiating in the interior waste container storage areas,
the exterior wooden LLW crate storage areas, and the office areas which are
contiguous to waste container storage areas. The Automatic Sprinkler System
suppressed the growth of fires in each of the areas, excepting the Building 996
waste container storage area which is not covered by the Automatic Sprinkler
System..
A-27 Building 991 Complex FSAR
Appendix A