05000395/LER-1983-014, Forwards LER 83-014/03L-0.Detailed Event Analysis Encl

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Forwards LER 83-014/03L-0.Detailed Event Analysis Encl
ML20072G343
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 03/17/1983
From: Dixon O
SOUTH CAROLINA ELECTRIC & GAS CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20072G345 List:
References
NUDOCS 8303240585
Download: ML20072G343 (2)


LER-2083-014, Forwards LER 83-014/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3952083014R00 - NRC Website

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March 17, 1983 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 83-014

Dear Mr. O'Reilly:

Please find attached Licensee Event Report #83-014 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 3.4.4, " Reactor Coolant System, Relief Valves," on February 17, 1983.

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

Very truly yours, O. W. D'xo , Jr.

HCF:OWD/dwf/fjc Attachment i G. J. Braddick i cc: V. C. Summer J. C. Miller T. C. Nichols, Jr.,/O. W. Dixon, Jr.

J. L. Skolds E. C. Roberts B. Knotts, Jr.

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H. N. Cyrus B. A. Bursey Group / General Managers I&E (Washington)

R. B. Clary Document Management C. A. Price i

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D Mr. James P. O'Reilly LER No.83-014 Page Two March 17, 1983 DETAILED DESCRIPTION OF EVENT At 1330 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.06065e-4 months <br /> on February 17, 1983, with the Plant in Mode 1, pressurizer power operated relief valve (PORV) PCV-445B was discovered to be leaking. Subsequently, its associated block valve XVG-8000C was closed, and its power was removed. On February 22, 1983, the block valve was reopened. The PORV experienced no leaks.

On March 3, 1983, with the Plant in Mode 1, PCV-445B was discovered to be leaking again. Block valve XVG-8000C was closed, and its power was removed. The block valve remains shut and de-energized to date.

The events were discovered when the pressurizer PORV discharge piping temperature indicator TI-463 indicated increasing temperature.

Technical Specification 3.4.4, " Reactor Coolant System, Relief Valves," requires all PORVs and their associated block valves to be operable. Therefore, Action Statement (a) of the Technical Specification was entered.

PROBABLE CONSEQUENCES No potential adverse consequences resulted from either of the events as three (3) pressurizer code safety relief valves are capable of providing RCS overpressure protection.

CAUSE(S) OF THE OCCURRENCE The cause of these events is attributed to pressurizer PORV PCV-445B leaking past the seat. The cause of the leak has not yet been determined.

1 IMMEDIATE CORRECTIVE ACTIONS TAKEN For both events, the associated block valve XVG-8000C was closed and its power was removed within one (1) hour in accordance with Action Statement (a) of Technical Specification 3.4.4.

PORV PCV-445B has been scheduled to be disassembled during the l steam generator modification outage scheduled to begin March 17, 1983. An evaluation will then be performed by engineering and maintenance personnel as to the cause of the event and any necessary action required to prevent recurrence.

ACTION TAKEN TO PREVENT RECURRENCE Any corrective action to prevent recurrence will be taken upon  ;

identification of cause of failure during the upcoming outage. l