ML20024B832

LER 83-030/03L-0:on 830527,both HPCI Area Smoke Detection Sys Alarmed in Main Control Room.Caused by Valve A02301-31 Steam Leak Causing False Indications.Valve repaired.W/830624 Ltr

ML20024B832
Person / Time
Site:	Pilgrim
Issue date:	06/24/1983
From:	Harrington W, Whitney G BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
83-161, LER-83-030-03L, LER-83-30-3L, NUDOCS 8307110476
Download: ML20024B832 (2)

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• LICENSEE EVENT REPORT m>om U/Cr3 so (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l o 12 II On 5/27/83 both HPCI area smoke detection systems alarmed in the main control i I o 13 I I room. One zone is required to be operable by T.S. Sec. 3.12. A. A fire oatrol I lo 14 ll was immediately established. This event caused no threat to the oublic health I lo ls l & safety. These smoke detectors were changed from a photo-electric type to an I j o ie ll ionization type as referenced by LER 82-034/03X-2. BECo. maintains the replace- l lo l7 j j ment detectors are the best suited to the environment in which they are used. I 10181l l u":: .::n:,

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I z l@lz l@ Iz l@ L.Z_J @10 101010 I IN l@ INl@ ll l@ l XI 91 9191 33 34 35 3 37 4. 4, 43 43 44 4F CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 lijoll Steam leaking by packing on the 02301-31 valve in the HPCI area caused false I l i l i l l smoke indications. Area coolers were used to clear the alarms until HPCI was I li l 2 l l isolated and made inocerable to reoair the leakina valve. (Ref. LER 83-031/03L-0)l.

,,,,g The smoke detectors did not require maintenance nor were they required to be

,,, made inoperable to clear the alarms. No future actions are planned.

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. .tLj@l N /A l lllllllllllll NAME OF PREPARER G. G. Whitney pgang;(617)746-7900 8307110476 830624 PDR ADOCK 05000293 0 PDR

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BOSTON EDIEON COMPANY B00 BovLaTON STREET l BOSTON, MAssACHumETTE O2199 )

WILLIAM D. HARRINGTO N ctusen woes ensaiosme nys6 san June 24, 1983 BECo. Ltr. #83-161 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 Dockot Number 50-293 License DPR-35

Dear Sir:

The attached Licensee Event Report 83-030/03L-0, "HPCI Area Smoke Detectors",

is hereby submitted in accordance with the requirements of Pilgrim Nuclear Power Station Technical Specification 6.9.B.2.b.

If there are any questions on this subject, please contact us.

Respectftlly submitted, William D. Harri gton WDH/mg

Enclosure:

LER 83-030/03L-0 cc: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555 l

l Standard BECo. LER Distribution l

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