05000395/LER-1983-009, Forwards LER 83-009/03L-0.Detailed Event Analysis Encl

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Forwards LER 83-009/03L-0.Detailed Event Analysis Encl
ML20079P193
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 02/23/1983
From: Dixon O
SOUTH CAROLINA ELECTRIC & GAS CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20079P197 List:
References
NUDOCS 8303040553
Download: ML20079P193 (2)


LER-2083-009, Forwards LER 83-009/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3952083009R00 - NRC Website

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,s SOUTH CAROLINA ELECTRIC & GAS COMPANY POST OFFtCE 764 CotuusiA. south CAROUNA 29218 l cp r

o. w. oixon, ;R.

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l February 23, 1983 --n .z '

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Mr. James P. O'Reilly, Director p f,"'<n, U.S. Nuclear Regulatory Commission u:

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'2 Region II, Suite 3100 101 Marietta Street, N.W. s- 4. -

Atlanta, Georgia 30303 u

SUBJECT:

Virgil C. Summer Nuclear Station Docket No. 50/395  !

Operating License No. NPF-12  !

Thirty Day Written Report  ;

LER 83-009

Dear Mr. O'Reilly:

Please find attached Licensee Event Report #83-009 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 16 of Technical Specification 3.3.2, Table 3.3-3, Items 2.c and 3.b.2, " Engineered Safety Feature Actuation System Instrumentation," on February 3,1983.

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

Very tru y yours, u

~ . . .

O. W. Dixon, .

CJM:OWD:dwf Attachment cc: V. C. Summer A. R. Koon T. C. Nichols, Jr. G. D. Moffatt E. C. Roberts Site QA O. W. Dixon, Jr. C. L. Ligon (NSRC)

H. N. Cyrus G. J. Braddick H. T. Babb J. L. Skolds D. A. Nauman J. B. Knotts, Jr.

M. B. Whitaker, Jr. B. A. Bursey W. A. Williams, Jr. I&E (Washington)

O. S. Bradham Document Management Branch R. B. Clary INPO Records Center C. A. Price NPCF File

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0 Mr. James P. O'Reilly LER No.83-009 Page Two February 23, 1983 DETAILED DESCRIPTION OF EVENT On February 3, 1983, with the Plant in Mode 1, the Main Control Board Pressure Indicator (PI-950) for Reactor Building Pressure failed low. The Channel was declared inoperable at 1515 hours0.0175 days <br />0.421 hours <br />0.0025 weeks <br />5.764575e-4 months <br /> and placed in the bypassed condition within one (1) hour in compliance with Action Statement 16 of Technical Specification 3.3.2, Table 3.3-3, Items 2.c and 3.b.2.

A similar failure occurred to this instrumentation channel on December 2, 1982, (Reference LER 82-016, Revision 1). The licensee believes that both events were a result of the same component failure.

PROBABLE CONSEQUENCES There were no adverse consequences duri'g this event since the remaining three (3) channels of Reactor Building Pressure Indication remained operable.

CAUSE(S) OF THE OCCURRENCE The cause of the events on December 2, 1982, and February 3, 1983, is attributed to the intermittent failure of Reactor Building Pressure Transmitter PT-950.

IMMEDIATE CORRECTIVE ACTIONS TAKEN The initial investigation, performed by mair'9 nance personnel, isolated the failure to Reactor Building Fressure Transmitter PT-950. The transmitter output, as measured in the instrumentation cabinet, had failed low (4mA).- The channel was subsequently placed in the bypassed condition at 1555 hours0.018 days <br />0.432 hours <br />0.00257 weeks <br />5.916775e-4 months <br /> in compliance with Action Statement 16 of Technical Specification 3.3.2. The transmitter output returned to normal af ter the channel was placed in bypass. The channel was returned to operable status at 1830 hours0.0212 days <br />0.508 hours <br />0.00303 weeks <br />6.96315e-4 months <br /> on February 3, 1983, upon the completion of a satisfactory surveillance test.

ACTION TAKEN TO PREVENT RECURRENCE In order to prevent recurrence, the licensee has scheduled Pressure Transmitter PT-950 for replacement. The transmitter replacement will be accomplished during the next plant outage which is scheduled to begin in March 1983.