05000395/LER-1983-025, Forwards LER 83-025/03L-0.Detailed Event Analysis Encl

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Forwards LER 83-025/03L-0.Detailed Event Analysis Encl
ML20073J988
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 04/11/1983
From: Dixon O
SOUTH CAROLINA ELECTRIC & GAS CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20073J991 List:
References
NUDOCS 8304190484
Download: ML20073J988 (2)


LER-2083-025, Forwards LER 83-025/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3952083025R00 - NRC Website

text

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'a SOUTH CAROLINA ELE'CTRIC & GAS COMPANY POST OFFICE 784 COLUMs,A. south CAmoLINA 29218
o. w. o,xon. s.

VICE PRESIDENT NUCLEAM OptRAfroNS p

April 11, 1983 25

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o z:n ao Mr. James P. O'Reilly .

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Regional Administrator U.S. Nuclear Regulatory Commission b;m

[1 Region II, Suite 2900 ..' L uc, 101 Marietta Street, N.W.

Atlanta, Georgia 30303 $$3

SUBJECT:

Virgil C. Summer Nuclear Station '

Docket No. 50/395

+

Operating License No. NPF-12 Thirty Day Written Report LER 83-025

Dear Mr. O'Reilly:

Please find attached Licensee Event Report #83-025 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 3.6.1.3,

" Containment Air Locks," on Maren 13, 1983.

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

- Very truly yours,

! 0. W. ixon, J.

i l 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.

f Group / General Managers I&E (Washington)

0. S. Bradham Document Management l R. B. Clary Branch

! C. A. Price INPO Records Center l A. R. Koon NPCF l D. A. Lavigne File (Lic./Eng.)

C. L. Ligon (NSRC) l i

8304190484 830411 l PDR ADOCK 05000395 S PDR WFICIAL Cdp %

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n Mr. James P.LO'Reilly LER No.83-025 Page Two - .

April 11, 1983

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EVENT DESCRIPTION AND' PROBABLE CONSEQUENCES At~ 0400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br /> on March 13, 1983, with the Plant in Mode 1, the Containment - Bulkhead Door Seal -on 'the Personnel Access Air Lock was found .to have an excessive seal leakage rate during the performance of Surveillance Requirement 4.6.1.3(a). The average leakage flow rate for this door was found to be 1,266.7 cc/ min. ,

which exceeded the maximum allowable total -leakage rate of' 724 cc/ min.-(0.01 La). The door was subsequently ~ declared inoperable in accordance with Action Statement (a) of -Technical Specification-3.6.1.3.

There were no adverse consequences - from this event since the outer air lock door seal only had a measurable leakage rate of 16.7 cc/ min. , which was well below the 0.01 La allowable limit.

Additionally, it was' determined that the excessive leakage rate had only recently occurred since- a total- leakage rate of zero ec/ min. was measured during an air lock test performed on March 10, 1983.

CAUSE AND CORRECTIVE ACTIONS The excessive leakage was due to dirt on the door seal. .The seEl was cleaned, and a total leakage rate of 66.7 cc/ min. was observed when the Personnel Access - Air Lock was subje :ted to another seal-leakage test. The door was declared operable at 0615 hours0.00712 days <br />0.171 hours <br />0.00102 weeks <br />2.340075e-4 months <br /> on March 13,-1983..

The licensee plans no additional. action in regards to' this event.

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