05000395/LER-1983-020, Forwards LER 83-020/03L-0.Detailed Event Analysis Encl

Forwards LER 83-020/03L-0.Detailed Event Analysis Encl

ML20073C459
Person / Time
Site:	Summer
Issue date:	03/31/1983
From:	Dixon O SOUTH CAROLINA ELECTRIC & GAS CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20073C466	List: 05000395/LER-1983-020, Forwards LER 83-020/03L-0.Detailed Event Analysis Encl 05000395/LER-1983-020-03, /03L-0:on 830305,fire Detector Sys Control Room Alarm Capability Lost for Intermediate Bldg Zones Aa,Bb & CC & for Diesel Generator Bldg Zones DG (427) & DG (436).Caused by Blown Fuse.Fuse Replaced
References
NUDOCS 8304130169
Download: ML20073C459 (2)

LER-1983-020, Forwards LER 83-020/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3951983020R00 - NRC Website

text

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SOUTH CAROLINA ELECTRIC & GAS COMPANY POST OPPICE 764 U/RC o cowusia. sovra cAnouma asat e ok r( rit,y o. w. oixos. an.

Vice Pass 40ENT O

March 31, 1983

• } APR g NUCLEan Openations N ' $$

Mr. James P. O'Reilly Regional Administrator U.S. Nuclear Regulatory Commission Region II, Suite _2900 101 Marietta Street, N.W.

Atlanta, Georgia 30303

SUBJECT:

Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 Thirty Day Written Report LER 83-020

Dear Mr. O'Reilly:

,Please find attached Licensee Event Report #83-020 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 5, 1983.

/

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

7 Very truly yours, O. W.

D on, J ARK: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)

R.

B.

Clary Document Manageraent C.

A.

Price Branch 0.

S.

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

A.

Lavigne File (Lic./Eng.)

C. L. Ligon (NSRC)

UYICIM,CO?h.

8304130169 830331 PDR ADOCK 05000395 S

PDR

$E ole 2 d.,

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D Mr. James P. O'Reilly LER No.83-020 Page Two March 31, 1983 EVENT DESCRIPTION AND' PROBABLE' CONSEQUENCES

~

At 1815 hours0.021 days <br />0.504 hours <br />0.003 weeks <br />6.906075e-4 months <br /> on March 5,1983, with the Plant in Mode 1, an indication of trouble with Integrated Fire and Security System (IFS) Remote Indication Acquisition Cabinet (RIAC) #12 was received in the Main Control Room.

RIAC #12 provides actuation alarms to the Main Control Room IFS panel for smoke detectors in Intermediate Building zones AA, BB, and CC, and for heat detectors in Diesel Generator Building zones DG (427) and DG-(436).

The 4

sprinkler systems associated with these detectors remained operable.

There were no adverse consequences since a fire watch patrol was implemented in compliance with Action Statement (a) of Technical Specification 3.3.3.7, thereby, establishing fire detection capability in the affected zones.

CAUSE AND CORRECTIVE ACTIONS

Investigation into the cause of the event revealed a blown fuse on instrument card ER-6.

The blown fuse was replaced, and RIAC #12 was returned to operable status at 1945 hours0.0225 days <br />0.54 hours <br />0.00322 weeks <br />7.400725e-4 months <br /> on March 5,1983.

1 No further corrective actions are deemed necessary.

4 J

.w.