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

BASES
REOUIRED
ACTION F I
UDO~ blockwe of the filters in the Building 991 FEW. che filtered exhaust safets
function may be lost. If the FEVS is not OPEIUBLE in the container
[continued) stomze/winp areas. the faciliw shall SUSPEED OPERATlONS in thx
AFFECTED AREAS within four hours The SUSPEND OPERATIONS
REOUIRED ACTIOK is a measure to reduce the likelihood of onemtiond
accidents in the AFFECTED AREAS. The suspension of o~erations does not
replace the filtered exhaust sdew fimction of the FEVS but attempts to mamttiin
an eauivalent risk bv reducing the likelihood of fire. spill, uuncture. and hydrogen
exdosion scenarios. The sumension of omrations does not preclude fin
initiation. Energized electrical svstems in the facilitv alwavs have the potential to
initiate fires. However, the likelihood of electrical system indud fires is
considered to be siznificantiv iess than fires initiated bv operations
&.g. - maintenance activities).
Revision L
Scptmher 1999
See the discussion under REOUmED ACTION A.l dealing with iustification of
the four-hour COMPLETION TIME and the scwe of the SUSPEND
OPERATIOIS REQUIRED ACTION.
A-59
Buildng 991 Complex FSAR
Appendix A
I