05000395/LER-1982-054, Forwards LER 82-054/03L-0.Detailed Event Analysis Encl

From kanterella
Jump to navigation Jump to search
Forwards LER 82-054/03L-0.Detailed Event Analysis Encl
ML20064J030
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 01/06/1983
From: Dixon O
SOUTH CAROLINA ELECTRIC & GAS CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20064J033 List:
References
NUDOCS 8301170482
Download: ML20064J030 (2)


LER-2082-054, Forwards LER 82-054/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3952082054R00 - NRC Website

text

f a w 4

SOUTH CAROLINA ELECTRIC & GAS COMPANY OST OFFICE 764 COLUMetA SOUTH CAROUNA 29218 O. W. DIKON, JR, ViCE PRESIDENT uvCte = o. " "' January 6, 1983 w

Mr. James P. O'Reilly, Director 5 U.S. Nuclear Regulatory Commission 3 Region II, Suite 3100 "3 -

101 Marietta Street, N.W. 7 Atlanta, Georgia 30303 E3

SUBJECT:

Virgil C. Summer Nuclear Stakion Docket No. 50/395 -

Operating License No. NPF-12 ,

Thirty Day Written Report LER 82-054

Dear Mr. O'Reilly:

Please find attached Licensee Event Report #82-054 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 10,

" Loose-Part Detection Instrumentation," on December 8,1982.

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

Very truly yours, O. W. Dixon, .

CJM:0WD:dwr Attachment cc: V. C. Summer A. R. Koon T. C. Nichols, Jr. G. D. Moffatt 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, J r. I&E (Washington)

O. S. Bradham Document Management Bran R. B._Clary INPO Records Center M. N. Browne NPCF L File @Y C$Y p/

r h/'

8301170482 030106 p/

PDR ADOCK 05000395 S PDR

r Mr. James P. O'Reilly LER No.82-054 Page Two January 6, 1983 DETAILED DESCRIPTION 10F EVENT On December 8, 1982, with the Plant in Mode 1, the Loose-Part Detection System f ailed the daily channel check performed in  !

accordance -with Surveillance Requirement 4.3.3.10. ( a) .

PROBABLE CONSEQUENCES There were no adverse consequences frem this event. The Plant had been at power for some time prior to the failure without detection of any loose parts. 1 CAUSE(s) 0F THE OCCURRENCE The cause of the occurrence is attributed to microprocessor failure in the Digital Metal Impact Monitor Cabinet.

IMMEDIATE CORRECTIVE ACTIONS TAKEN Channels 756 and 757 which monitor Steam Generator "B" were declared inoperable in accordance with Technical Specification 3.3.3.10. Investigation into the cause of failure by the Instrumentation Group indicated that the audio signals were still available but that they were not being adequately deciphered by the microprocessor. The microprocessor was replaced, and the Loose-Part Detection System was returned to operable status on December 16, 1982, upon the satisfactory performance of a Channel Operational Test per the appropriate surveillance test procedure.

-ACTION TAKEN TO PREVENT RECURRENCE The Licensee plans no further action other than normal surveillance testing.