05000395/LER-1982-014, Forwards LER 82-014/03L-0.Detailed Event Analysis Encl

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Forwards LER 82-014/03L-0.Detailed Event Analysis Encl
ML20066C343
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 11/01/1982
From: Dixon O
SOUTH CAROLINA ELECTRIC & GAS CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20066C346 List:
References
NUDOCS 8211090466
Download: ML20066C343 (2)


LER-2082-014, Forwards LER 82-014/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3952082014R00 - NRC Website

text

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SOUTH CAROLINA ELECTRIC & GAS COMPANY po., o, rice m cotuusiA. sours cAnotinA asais

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o. w. oixon. Ja.

"S uve .. o,. 'r[ou. November 1, 1982 @ ]g

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.[x Mr. James P. O'Reilly, Director ['o ki U.S. Nuclear Regulatory Commission Region II, Suite 3100

.. '[L 101 Marietta Street, N.W.

,_ 37

s. 7-Atlanta, Georgia 30303

~

SUBJECT:

Virgil C. Summer Nuclear Station -

Docket No. 50/395 Operating License No. NPF-12 Thirty Day Written Report LER 82-014

Dear Mr. O'Reilly:

Please find attached Licensee Event Report #82-014 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 the Action Statement of Technical Specification 3.6.1.3,

" Containment Air Locks," on October 2, 1982.

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

Very truly yours, ff '. .

O. W. Dixon, Jr.

ARK:0WD:dwr Attachment cc: V. C. Summer A. R. Koon T. C. Nichols, Jr. H. Radin G. H. Fischer Site QA

0. 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 NPCF M. N. Browne File opy1CIAL COPl.,

  • i Mr. James P. O'Reilly LER No.82-014 Page Two November 1, 1982 DETAILED DESCRIPTION OF EVENT Technical Specification 4.6.1 3.(c) requires the Reactor Building personnel airlock to be verified operational once every six months to ensure that only one door of the airlock can be opened at a time. Surveillance Test Procedure (STP) 115.002, " Reactor Building Airlock Test," addresses this specification. In performing the STP with the Plant in Mode 3, it was discovered that the air pressure equalizing valves would not cycle in their proper sequence. The test was immediately terminated, and the airlock was declared inoperable on October 2, 1982. A maintenance work request (MWR) was initiated for troubleshooting and repair.

The airlock was repaired and returned to operable status on October 3,1982, within the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> requirement of the Technical Specification Action Statement (a).

PROBABLE CONSEQUENCES There was no adverse consequence as the Plant had not achieved initial criticality and no radiation inventory existed.

CAUSE(S) 0F THE OCCURRENCE A chain drive sprocket that actuates the pressure equalizing valves sheared a key allowing the sprocket to slip on its associated drive shaft. This caused mechanical linkages to move out of sequence.

IMMEDIATE CORRECTIVE ACTIONS TAKEN The key was replaced, and the airlock was tested satisfactory per STP-115.002 within the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> requirement of the applicable Technical Specification Action Statement.

ACTION TAKEN TO PREVENT RECURRENCE The licensee considers this failure to be an isolated case; and therefore, plans no further action for this event.

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