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

BASES
REOUIFED
ACTION B.2.1
(continued)
REOurRED
ACTION B.2.2
Revision 1.
Soptembcr 199?
?he two-hour COMPLETION TIME associated with thz tznniriation of hot wri,
provides adequate time for facilih; matiaemcnt to inform the workers of the
reaujred tenniiiation and for die workers to safelv terminate tlic work The
termination of these activities does not negate any fire watch requirements
associaxed with the oripinal activity. That is if the hot work Demit stiuulattzd a
continuous fire watch €or eight iioun to monitor equipment whik it is cooling. thc
teminatioii of the activitv would not relax the requireineiit for a continuous fire
- watch.
"he two-hour COhIPLETIOX TULE does not result in undue risk due to tk
alreadv continuous monitoring of the actit-ities bv &e worken involved in thc
activities. However. the REOUIRED ACTION to terminate all hot \%ark in the
AFFECTED AREAS is expected to bc imulemented as soon as reasonably
achievable. even if this is significantly less than the assimed COMPLETION
TIME. The two-hour COMPLETION TIME should not be used for ouerational
convenience.
LCO 3.3 will not be met if the Automatic Plenum Defwe Systzm IS RO~
OPERABLE in the Building 985 FEC'S Dlenutn. The absence of the dclwc
sstm fuiicuon in the Building 985 FEVS plenum Drovides the Dotentid for 3
large fkcilitv fire to irnDact the Building 985 FEW filters if the FEVS is beinq
used. The Automatic Plenum Deluge Svstem bctions to cool the air entering the
plenum andor to sumress hot embers and flving brands from igniting die HEPA
filters. Without the deluge function. the Iikeliood of lave fires in the fadm
imDasxhs the filters in the DIenum is increased. The f$Cilitv is still urotected if
the duration of the not OPERABLE configuration is decreased sufficiently to
offset the increased likelihood of lame fires im.tlacIing the HEPA fdters.
If the Automatic Plenum Delwe Swtem is not OPERABLE. the facility shall
restore the hction within 45 days. The restoration of the fiinction within 3
limited time period is a measure to Limit the likelihood of fire initiation in thc
facilitc. inlDactine the HEPA filters. REOUIRED ACTION 8.2.1 is identified to
nduce the likelihood of Iaree fire initiation during the time taken to restore the
Automatic Plenum Deluge System.
The 45 dav COMPLETION TIME associated with the estomion of the plentm
deluge function Drovides adequate time for facilitt. management to repair mmc ot
die deluoe svsteni &filed coniiwrations. Readily availabie ware arts can bc
obtained and simple rwairiniaintenmce actit-ities can be cmductcd within th:
45 day Period.
A-7 1 Building 991 Complex FSAR
Appendix 4