ML18347B228
| ML18347B228 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 07/28/1978 |
| From: | Hoffman D Consumers Power Co |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| References | |
| Download: ML18347B228 (4) | |
Text
consumers Power company General Offices: 212 West Michiga A
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- Area Code 517 788-0550 July 28, 1978 Director, Nuclear Reactor Regulation Att:
Mr Dennis L Ziemann, Chief Operating Reactors Branch No 2 US Nuclear Regulatory Commission Washington, DC 20555 DOCKET 50-255 - LICENSE DPR-20 PALISADES PLANT - FIRE PROTECTION
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\\_;l l_: I Delineated below is Consumers Power Company's response to further staff positions and requests for information concerning the Palisades Plant's fire protection program.
This letter is submitted as specified in your letter of July 24, 1978.
Position 1 Smoke detectors to alarm in the control room should be provided in the emergency feed-water pump room and in each battery room.
Response
Smoke detectors shall be provided for these areas.
Position 2 The fire door separating the cable spreading room from Switchgear Room 1-D should be electrically supervised, locked or provided with a fire sensitive closure device.
Response
After discussions with your staff, Consumers Power Company will commit to installing automatic closure with fusible links for the door while continuing to maintain the present level of administrative controls.
Position 3 Manual hose stations should be provided in the reactor containment building.
Response
Manual hose stations utilizing the existing service water system will be installed in the containment building.
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Position 4 Additional length of fire hose should be provided for the hose station serving the safeguards rooms.
Response
The required additional length of hose will be made available.
Position 5 As required by BTP 9-5-1 a breathing air supply should be provided adequate to supply for six hours the minimum fire brigade and number of operators required to safely shut down.
Response
Consumers Power Company will comply with this position.
Item 1 Identify which areas of the turbine building are protected by area sprinkler coverage.
Response
The following areas of the turbine building are presently protected by a sprinkler system:
(1)
Heating boiler rooms.
(2)
Old warehouse area (at Elevation 607 1, Room 245).
(Now office space.)
(3)
Toolroom (at Elevation 590', Room 130).
(4)
Turbine lube oil room.
(5)
Hydraulic control area (HP turbine).
(6)
Feed pump turbine driver.
(7)
Under the main generator (at Elevation 675 1 and below).
In general the main cable tray area and potential oil spill areas are covered by spray systems.
Prints delineating the sprinkler system layout are attached.
Item 2 Verify that the fire detection and alarm circuitry is electrically supervised for open circuits and shorts to ground and supplied by an emergency power source, and the major components of the system are approved by a recognized testing laboratory.
Response
All propo_sed fire detection and alarm circuitry will be electronically supervised for failure of the instrument and associated cabling.
Fire detection and alarm equipment'- is powered f:r.om the Class 1 instrument bus - preferred ac, and therefore
3 can be supplied by site emergency power sources.
For those existing safety-related detection instruments that are not supervised, a Technical Specifications Change w~ll be submitted reflecting an augmented surveillance program as speci-fied in the Standard Technical Specifications.
The majority of existing system components are approved by a recognized testing laboratory.
Proposed modifications will meet this criteria with one exception.
Photoelectric detector DPS-1 is not UL certified, but is deemed to be acceptable for use in this modification.
The device is not UL approved due to the super-vision of the light source in the detector.
UL requires that a light failure produce a "trouble" alarm and the design of the detector is such that is produces a "fire" alarm on failure of the light source or sensing amplifier. It is felt that adequate supervision of the light source is provided by this means and the intent of the UL requirement is met.
Item 3 Describe the protection afforded turbine building floor drains to prevent a fire from being transmitted to safety-related areas via the drain system.
Response
The turbine building drains are connected to a system separate from those in safety-related areas with the exception of the auxiliary feed~water pump room, the cable spreading room and the diesel generator rooms.
The auxiliary feed-water pump room and diesel generator rooms are equipped with check valves in the floor drains to prevent backflow.
The possibility of fire backflow into the cable spreading room from the drain system is considered remote because of the great head/elevation difference (approximately 17 feet).
Prints detailing the turbine building diain system are attached.
Item 4 Verify that the backdraft dampers referred to on page VII-147 of the Palisades Fire Protection Evaluation are to be fire rated dampers.
Response
As stated previously, the backdraft dampers are to be fire rated dampers.
Item 5 Provide (a)
(b)
( c)
( d)
(e)
(f) a final implementation schedule for the following modifications:
Rerouting of Power and Control Cables (original CPC mods. # 6 and 7)
Independent Shutdown Path (Beyond mods. # 6 and 7)
Emergency Lighting Battery Room Loss of Ventilation Technical Specifications Equipment Removal
(g)
Reactor Coolant Pump Oil Collection System (h)
Portable Smoke Removal (i)
Charging Pump Curb (j) Fire Brigade Equipment (k)
Yard Area Hydrant Equipment Projected implementation dates for these modifications are as follows:
(a)
June 1980 (b)
June 1980 (c)
March 1980
( d)
March 1980
( e)
As specified in our submittal of June 30, 1978 (f)
October 1978 (g)
March 1980
( h)
March 1979 (i)
January 1979
( j )
March 1979 (k)
March 1979 These dates are based on timely procurement and s*table outage schedules, thus may be susceptible to change.
Item 6 Provide a submittal date for cable penetration firestop test results.
Response
It is expected that the test results will be available by October 1, 1978.
David P Hoffman Assistant Nuclear Licensing Administrator CC:
JGKeppler, USNRC