ML20093D783

Special Rept Spr 84-012:on 840905,steam Line high-range Gamma Monitor Declared Inoperable Due to Spurious Alarms. Caused by Dirty Preamplifier Card Contacts.Contacts Cleaned & post-maint Surveillance Test Performed

ML20093D783
Person / Time
Site:	Summer
Issue date:	09/20/1984
From:	Dixon O SOUTH CAROLINA ELECTRIC & GAS CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
SPR-84-012, SPR-84-12, NUDOCS 8410110395
Download: ML20093D783 (2)

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SOUTH CAROLINA ELECTRIC & gas COMPANY Post oprica 7e4 CoLuusiA south CAnoLINA 29218 34 SEP24 geWdar 20, 1984 u,

Mr. James P. O' Reilly Regional Administrator U.S. Nuclear Regulatory Commission Suite 2900 101 Marietta Street, NW Atlanta, GA 30323

SUBJECT:

Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 Special Report (SPR 84-012)

Dear Sir:

Please find attached a Special Report for the Virgil C. Summer Nuclear Station.

This Report is required by Technical Specification 6.9.2 as a result of entry into Action Statement (30) of Technical Specification Table 3.3-6, " Radiation Monitoring Instrumentation," on September 5,1984.

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

Very tru

ours, j

O.

D i

RJB:OWD/ led Attachment

-cc:

V. C. Summer K. E. Nodland I

T. C. Nichols, Jr./O. W. Dixon, Jr.

R. A.

Stough E.

H. Crews, Jr.

G. Percival E. C. Roberts C. W.'Hehl W. A. Williams, Jr.

J. B.

Knotts, Jr.

D. A. Nauman I&E Washington Group Managers Document Management Branch O. S. Bradham INPO Records Center C. A.

Price ANI Library D. A. Lavigne NPCF J. F. Heilman File C. L. Ligon (NSRC) 8410110395 840920 gDRADOCK05000 gM i

L

- Mr. James ~P.

O' Reilly SPR 84-012

- Page Two September 20, 1984 EVENT DESCRIPTION AND ACTION TAKEN On September 5, 1984, with the Plant in Mode 1, RMA--19A, Steam Line High Range Ganssa Moni t.:,r, was declared inoperable.' because of spurious alarms. ' The Licensee initiated the preplanned. alternate method of monitoring the parameter in accordance with Action

- Statement 30 -of Technical Specification Table - 3.3-6 i " Radiation Monitoring Instrumentation."

The cause of the. spurious alarms'was dirty pre-amplifier card contacts.. The contacts were cleaned, the applicable post-maintenance surveillance test was performed, and the unit was declared operable on September 12, 1984.

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