ML20237E994

Deficiency Rept Re Protection of Containment Electrical Penetration Assemblies (Epa).Initially Reported on 871203. Investigations in Progress.Final Rept Will Be Submitted by 880130

ML20237E994
Person / Time
Site:	Vogtle
Issue date:	12/22/1987
From:	Rice P GEORGIA POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
GN-1421, NUDOCS 8712290300
Download: ML20237E994 (2)

Text

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• 10 Georgia Power Company Post Office Box 282 Waynesboro. Georg.a 30830 Telephone 404 554 9901. Edension 3413 404 724-8114. Extension 3413 n

P. o. Ric, Georgia Power v nt vm ,, a,,,c s,,em December 22, 1987 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk File: X7BG03-M141 Washington, D. C. 20555 Log: GN-1421

Reference:

Vogtle Electric Generating Plant - Unit 2; 50-425 Containment Electrical Penetration Assemblies On December 3, 1987, Mr. C. W. Hayes, Vogtle Quality Assurance Manager, notified Mr. M. V. Sinkule of the USNRC-Region II of a potentially reportable condition under 10CFR50.55(e) associated with protection of the containment electrical penetration assemblies (EPAs).

The purpose of the EPAs is to pass electrical conductors through the containment wall while maintaining containment pressure boundary integrity before, during, and af ter plant design basis accidents.

To assure integrity of the EPA conductors in the event an overcurrent condition, redundant protective devices are designed for each EPA.

However, approximately 30 cases have been identified on Unit 2 where either the secondary protective device was not provided, or the time-current curve of the protective device was not adequately enveloped by the thermal damage limit curve of the EPA conductor.

All cases identified thus far involve non-safety related circuits.

The calculation documenting the review of the protective devices for the power and control circuits passing through the EPAs is not yet finalized.

GPC anticipates submitting a final report on this issue prior to January 30, 1988.

This correspondence contains no proprietary information and may be placed in the NRC Public Docuement Room.

8712290300Bhh25 PDR ADOCK O PDR M'

P. D. Rice S

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File: X7BG03-M141 Log: GN-1421 December 22, 1987 Page two xc: H. G. Baker G. Bockhold, Jr. L. T. Gucwa J. P. O'Reilly G. R. Frederick C. W. Hayes R. H. Pinson J. E. Swartzwelder R. W. McManus E. D. Groover J. E. Joiner (TSLA) Sr. Resident (NRC)

C. T. Moore G. A. McCarley D. H. Smith (OPC)

D. R. Altman J. A. Bailey NORMS R. A. Thomas W. R. Evans i