ML20028F397

Ro:On 821207,fire Detector 113-101 Determined Inoperable. Cause Undetermined.Plant Mod Required Prior to Installation of Replacement Since Failed Detector No Longer in Production

ML20028F397
Person / Time
Site:	Susquehanna
Issue date:	01/20/1983
From:	Keiser H PENNSYLVANIA POWER & LIGHT CO.
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
PLA-1494, NUDOCS 8302010324
Download: ML20028F397 (2)

Text

. .E PP&L Pznnsylvania Powcr & Light Company Two North Ninth Street

• Allentown, PA 18101

• 2151770 5151 January 20, 1983 Mr. R. C. Haynes Director, Region l U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 SUSQUEHANNA STEAM ELECTRIC STATION SPECIAL REPORT ER 100450 FlLE 841-23 Docket No. 50-387 PLA - 1494 License No. NPF-14

Dear Mr. Haynes:

Please find attached a Special Report prc,9ared in accordance with Technical Specifications 3.3.7.9.b and 6.9.2 concerning a Technical Specification listed fire detection instrument which was inoperable for greater than 14 days.

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H. W. Ke i se r Superintendent of Plant DGM/klm cc: A. Schwencer, Chief Licmsing Branch No. 2 Division of Licensing U.S. Nuclear Regulatory Commission Washington , D.C. 20555 G. Rhoads Resident inspector U.S. Nuclear Regulatory Commission P.O. Box 52 Shickshinny, PA 18655 8302010324 830120 PDR ADOCK 05000387 S PDR g&S'

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Attachment to PLA-1494 Special Report On December 7, 1982, it was determined that fire detector 113-101 was inoperable.

This smoke detector is of the photoelectric type and is located in fire zone 1-50, the Reactor Water Cleanup Pump and Heat Exchanger room. There is another photo-electric detector in that area, however, the failed alarm indication for detector 113-101 would mask a real alarm from the other detector. Limiting Condition for Operatico 3 3 7.9.b establishes a 14 day interval (expired on December 21, 1982) after which a Special Report must be filed. Since December 7,1982, a fire patrol (in accordance with the LCO) has inspected the area surrounding the inaccessible-zone at least once per hour. The cause of the detector failure has not yet been determined.

The detector which failed is no longer in production and the manufacturer's recom-mended replacement detector is not compatable with the existing base. Therefo re ,

a plant modification and associated paper work is required prior to installing a replacement detector. This requirement necessitated a delay in replacing the inoperable detector. The paper work is now available to install the modification, which will be performed during the next available outage.

To prevent a similar delay from occurring should another photoelectric detector become inoperable, the necessary typical drawing for replacement of existing detectors with the new model type will be available. Future change-outs will still require the plant modification package but should require less time to complete.

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