ML18142B283
| ML18142B283 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 05/12/1976 |
| From: | White L Rochester Gas & Electric Corp |
| To: | O'Reilly J NRC/IE, NRC Region 1 |
| References | |
| Download: ML18142B283 (4) | |
Text
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o 89 EAST AVENUE, ROCHESTER, N.Y. 14649
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ROCHESTER GAS AND ELECTRIC CORPORATION
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Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406
Subject:
Supplemental report on Reportable Cccurrence
. clays for Train "A" containment isolation and containment ventilation isolation failure to latch R. E. Ginna Nuclear Power Plant, Unit No.
1 Docket No. 50-244
Dear Mr. O'Reilly:
1n the subject Licensee. Event Repor). dated March i, i976, it was stated that the remaining MG-6 relays in safeguard racks would be checked for clearance during safeguard functional test during the refueling outage that was in'progress.
Fourteen relays were checked for clearance between the electro-magnet pole face and the raised section of the armature which strikes the pole face.
As per Westinghouse instruction manual the clearance should be between
.005" and.015".
The results of the inspection are as follows:
1.
Nine relays were found with about..012" clea'rance.
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2.
Two relays were found with about.006" clearance.
They were adjusted to about.012".
.Two relays were found with about.005" clearance.
They were adjusted to about.012".
One relay was found with less than.005" clearance.
It was adjusted to about.012".
The Nuclear Safety Audit and Review Board, at their meeting on April 13, 1976, recommended that at least one check of the clearance on
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oATE May 12, 1976 Mg. James P, O'Reilly, Director
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these MG-6 relays be made no later than the next regular refueling to detect any drift of these settings.
Two additional copies of this letter are enclosed.
Very truly yours, cc:
Dr. Ernst Volgenau (30)
Mr. William G. McDonald (3)
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