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

7
;' LT 6,
BASES
REQUDRED
ACTION D. 1
(continued)
Revision L
Seplernbcr 1990
If the Flow Alarm Transmittal System is not OPERABLE for Riser System B, the
facility shall comply with Site requirements for establishing a fire watch in the
AFFECTED AREAS within four-hours. If a fire watch is established, the fire
watch partly replaces the fire detection and alarm functions of the Flow Alarm
Transmittal Systems with a fire watch individual capable of providing the
functions during watch tours. The fire watch individual is expected to notify the
Fire Department in the event of a fire, either via fire phones or an alternative
method if the fie phones are unavailable. The Fire Department then provides a
DEFENSE-IN-DEPTH fire suppression function in addition to the Automatic
Sprinkler System.
The'establishing of a fire watch in the AFFECTED AREAS does not provide
ill-time fire detection and alarm capability. A fire could initiate and propagate
between tours of the fire watch. Because the fire watch does not monitor all areas
continuously and, therefore, does not completely replace the fire detection and
alarm capability of the Flow Alarm Transmiteal Systems, a reduction in fire
initiating event or propagation frequency is warranted. REQUIRED ACTION D.2
is identified to reduce the likelihood of fire initiation in the AFFECTED AREAS.
While the fire wz.1 does not provide the full-time fire detection and alarm
capability afforded by an OPERABLE Flow Alarm Transmittal System, the fire
watch individual has the capability to detect fires well in advance of the actuation
of the Automatic Sprinkler System. This earlier fire detection capability partially
offsets the non-continuous coverage of the fire watch.
The four-hour COMPLETION TIME for determining and establishing a fire watch
in accordance with Site requirements provides adequate time for facility
management to assign the appropriate personnel, particularly on back shifts and
weekends. Occupants of the facility can perform the fire watch function. The
four-hour COMPLETION TIME does not result in undue risk due to the low
initiation frequency of a fire, particularly in waste container storage areas
However, the REQUIRED ACTION to establish a fire watch in accordance with
Site requirements is expected to be implemented as soon as reasonably achievable.
even if this is significantly less than the assigned COMPLETION TIME. The
four-hour COMPLETION TIME should not be used for operational convenience
A-38 Building 991 Complex FSAR
Appendix A
.