ML19322A277
| ML19322A277 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/16/1979 |
| From: | Herbein J METROPOLITAN EDISON CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| GQL-0393, GQL-393, NUDOCS 7903220216 | |
| Download: ML19322A277 (3) | |
Text
7 Metropolitan Edison Company e
Post Office Box 542 Reading Pennsylvania 19640 215 929 3601 Writer's Direct Dial Number March 16, 1979 GQL 0393 Director of Nuclear Reactor Regulation Attn: R. W. Reid, Chief Operating Reactors Branch No. 4 U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Sir:
Three Mile Island Nuclear Station, Unit 1 (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 Fire Protection Program Fire Protection Safety Evaluation Report (FPSER) Item 3.1.1 requires fire detectors to be installed in various locations at TMI-1.
Five copies each of the following drawings, which show the proposed location of these detectors, are enclosed:
Drawing No.
Rev.
E-313-501 IA-BB E-313-502 IA-BB E-313-503 IA-BB E-313-504 IA-BB E-313-505 IA-BB E-313-506 IA-BB These detectors will be either surface-mounted, field adjustable, dual chamber ionization type smoke detectors or dual chamber ionization type smoke detectors with air duct detector housing and sampling tube. The sampling tube size is chosen to appropriately match the duct size.
This fire detection system meets the requirements outlined in the NRC Branch Technical Position APCSB 9.5-1 Appendix A.
These requirements are:
Branch Technical Position Fire Detector Design E.1.
Fire Detection a.
Fire detection systems should as a.
The new fire detector system will a minimum comply with NFPA 72 D, comply with NFPA 72 D, except for
" Standard for the Installation, the location of the fire detectors
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R. W. Reid, Chief March 16, 1979 GQL 0393 Maintenance and Use of Proprietary inside the Reactor Building.
Protective Signaling Systems".
These locations are based on Deviations from the requirements the NRC's Branch Technical of NFPA 72 D should be identified Position APCSB 9.5-1 Appendix A and justified.
Guidelines for Specific Plant Areas, Section F.1 (a), which states, in part, "The type of detection used and location of the detectors should be most suitable to the particular type of fire that could be expected from the identified hazard. A primary containment general area fire detection capability should be provided as backup for the above described hazard detection.
To accomplish this, suitable smoke detection should be installed in the air recirculation system ahead of any filters". The details of the specific coverage in the Reactor Building are described below, b.
Fire detection system should give b.
New fire detector system will audibic and visual alarm and comply completely.
annunciation in the control room.
Local audible alarms should also sound at the location of the fire.
c.
Fire alarms should be distinctive c.
New fire detector system will and unique. They should not be couply completely.
capable of being confused with any other plant system alarms, d.
Fire detection and actuation d.
New fire detector system will systems should be connected to comply completely, the plant emergency power supply.
The Reactor Building fire detector system provides for specific area coverage at the following locations:
l'.
Twelve (12) smoke detectors for the R.C.P. motor areas.
2.
'One detector for the elevator machinery room.
3.
One detector for each DH-V1 and DH-V2.
[
4' One detector at the~ cable tray area at elevation 291' outside letdown l
coolers'and'two detectors at the cable tray area near the personnel access hatch.
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e
'R. W. Reid, Chief March 16, 1979 CQL 0393 5.
Two detectors at the CRDM cable duct area.
The above detectors are supplemented by the duct-type detectors outlined on the drawings.
The new fire detector systems will meet NFPA 72 D requirements for a Class B system. In addition, the fire detector system will provide continuous supervision of power supply, detector, and alarm signal circuitry.
Si erely J.
. Herbein Vice President-Generation JGil:WSS:tas
Enclosures:
Referenced Drawings (5 copies each)
.