05000395/LER-1983-030, Forwards LER 83-030/03L-0.Detailed Event Analysis Encl

Forwards LER 83-030/03L-0.Detailed Event Analysis Encl

ML20073Q060
Person / Time
Site:	Summer
Issue date:	04/22/1983
From:	Dixon O SOUTH CAROLINA ELECTRIC & GAS CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20073Q061	List: 05000395/LER-1983-030, Forwards LER 83-030/03L-0.Detailed Event Analysis Encl 05000395/LER-1983-030-03, /03L-0:on 830324,reactor Bldg Fire Detection Zones Ooo & Ppp Declared Inoperable When Power Supply Breaker Opened.Caused by Faulty Power Supply Transformer in Smoke Detector IXA-4964E in Zone Ppp.Transformer Replaced
References
NUDOCS 8304280133
Download: ML20073Q060 (2)

LER-1983-030, Forwards LER 83-030/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3951983030R00 - NRC Website

text

O SOUTH CAROLINA ELECTRIC & GAS COMPANY post oppics ve4 CotumaiA, south CAmoONA 29218 O. W. DixoN, JR, 03 vica Passioemt W

g, NUCtama OpenatioNs April 22, 1983

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Mr. James-P. O'Reilly

• yn Regional Administrator 15 5 7

- Z U.S. Nuclear Regulatory Commission Region II, Suite 2900 ro 101 Marietta Street, N.W.

Atlanta, Georgia 30303

SUBJECT:

Virgil C. Summer Nuclear Station t

Docket No. 50/395 Operating License No. NPF-12 Thirty Day Written Report LER 83-030

Dear Mr. O'Reilly:

Please find attached Licensee Event Report #83-030 for Virgil C.

Summer Nuclear Station.

This Thirty Day Report is required by Technical Specification 6.9.1.13.(b) as a result of entry into Action Statement (a) of Technical Specification 3.3.3.7, " Fire Detection Instrumentation," on March 24, 1983.

Should there be any questions, please call us at your' convenience.

Very truly yours, c'f O. W. Dixon, Jr.

CJM:0WD/dwr Attachment cc:

V.

C.

Summer G.J.

Braddick T.

C.

Nichols, Jr.,/0. W. Dixon, Jr.

J.

C. Miller E.

C.

Roberts J. L.

Skolds H. N. Cyrus J. B.

Knotts, Jr.

Group / General Managers I&E (Washington)

O.

S.

Bradham Document Management R.

B.

Clary Branch C.

A.

Price INPO Records Center A. R. Koon NPCF D.

A. Lavigne File (Lic./Eng.)

.C. L. Ligon (NSRC)

! FFICIAb9-QW ' [h dM 8304290133 830422 PDR ADOCK 05000395 S

PDR

o, Mr. James P. O'Reilly LER No.83-030 Page Two April 22, 1983 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES At 1730 hours0.02 days <br />0.481 hours <br />0.00286 weeks <br />6.58265e-4 months <br /> on March 24, 1983, with the Plant in Mode 5, Reactor Building Fire Detection Zones 000 and PPP were declared inoperable when the power supply breaker was opened.

Intermittent trouble alarms were being received from these zones; therefore, the electrical service was isolated to ~ allow maintenance personnel to locate and repair the problem.

A fire watch patrol was established within one (1) hour in accordance with Action Statement (a) of Technical. Specification 3.3.3.7, and personnel were directed to inspect t,he'-con l.ainment at Jeast once per eight (8) hours.

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Thers were no adverse consequences' ftem this event since the Plant was in an outage at the time of the occurrence, and the fire watch patrol minimized the possibility of C fire being undetected.

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s CAUSE AND CORRECTIVE ACTIONS,

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s disccvsred 'to be a. faulty The cause of the trouble \\alapps, was power supply transformer in smoke detector IXA-4964E, which is located in Room 63-01 NW of 30pe t'JP'.'

The transformer was replaced, and the subject zones wety returned to pperable status at 1700 hours0.0197 days <br />0.472 hours <br />0.00281 weeks <br />6.4685e-4 months <br /> on March 29,-1923,, upon the completion, of a satisfactory Operational Test.

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.s The licensee considers the ocdtr'ren'ce to be an isolated event and plans no additional actions.

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