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Walls and Concrete Roofs
Building Structure /Hallway
Floor
Compressed Gas Cylinders*
Table 3 BUILDING 991 COMPLEX DESIGN FEATURES
Revision I A-I35
Sentemher 1990
was credited with reducing the possibility that a NPH/EE (i e, high wds,
tornadoes, heavy rain, heavy snow, aircraft crash, or seismic) could impact
radioactive waste containers. The building structure is credited wth
(1) surviving a design basis earthquake, (2) surviving high winds and tornadoes,
(3) surviving wind driven missiles; (4) Surviving atmospheric pressure changes,
(5) surviving a roof collapse due to heavy rain or heavy snow, and (6) m m g
anaircraftcrash.
"he Building 991 structure (hallway floor (Room 1532) was credited wth
reducing the likelihood that structural failure of the floor could impact
radioactive waste containers. The accident types that could result from structural
failure of the floor is a radioactive material spill due to container breach.
Compressed gas cylinders were identified in the analysis and are relied on to
provide confinement (ie., physical banier) for flammable materials. Conmen
brought into the facility are required to meet Department of Transportanon
(DOT) requirements for compressed gas cylinders. Containers meeting these
requirements reduce the possibility that a flammable gas container will fad
resulting in a facility explosion that could damage the facility and impact
radioactive waste containers.
Building 991 Complex FSAR
Appendix A