ML20073J156

Final Rept of Potentially Reportable Deficiency 105 Re Corrosion on GE H-L Time Overcurrent Relays in 480-volt Switchgear.Initially Reported on 830311.Condition Determined Not Reportable Per 10CFR50.55(e)

ML20073J156
Person / Time
Site:	Waterford
Issue date:	04/08/1983
From:	Maurin L LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CR-050.55E, 10CR-50.55E, W3I83-0110, W3I83-110, NUDOCS 8304190218
Download: ML20073J156 (2)

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.v LOUISIANA f we ouAnoNoe Smm POWE R & LlG H T/ P O BOX 6008. NEW CALEANS. LOUISlANA 70174. (504) 366 2345

$uSN2vsE L V. MAURIN April 8, 1983 W3183-0110 Q-3-A35.07 Mr. John T. Collins, Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 7

611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012

SUBJECT:

Waterford SES Unic No. 3 APRI5G33 o

Docket No. 50-382 d

Potentially Reportable Deficiency No. 105 U

" Corrosion on General Electric H-L Time Overcurrent Relays in 480V Switchgear" Final Report

REFERENCE:

Telecon from M. A. Livesay to J. Boardman on March 11, 1983

Dear Mr. Collins:

On March 11, 1983 a problem with corrosion on GE H-L Time Overcurrent Relays in 480V Switchgear was reported to your office as Potentially Reportable Deficiency No. 105. This letter is to inform you that after further evaluation, this condition is not considered to be reportable pursuant to the requirements of 10CFR50.55(e) for the following reasons:

1) Before these relays go into service they are fully inspected, tested, and calibrated. Any misoperation during this phase would immediately be investigated for its cause.

2) These relavs are used for additional overcurrent protection on MCC feeders and do not perform any primary safety function. They are being used to essentially duplicate protection performed by the ECS programmers for the switchgear breakers. The design and operation of this electrical system would not be compromised if these relays failed to operate.

47 Very truly yours, f

f v maw L. V. Maurin LVM/ MAL:keh G3041902iO 2

PDR ADOCK PDR S

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~%Y John T. Collins W3I83-0110 Page 2 cc:

1) Director 3)

Mr. E. L. Blake Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C.

20555 (with 15 copies of report)

2) Director 4)

Mr. W. M. Stevenson Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C.

20555 (with I copy of report) l i

I

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