05000244/LER-2076-010, R. E. Ginna - Supplemental Report on LER 1976-10-00, R. E. Ginna Plant, Containment Purge Supply Valve Having Excessive Leakage During Testing

R. E. Ginna - Supplemental Report on LER 1976-10-00, R. E. Ginna Plant, Containment Purge Supply Valve Having Excessive Leakage During Testing

ML18142B278
Person / Time
Site:	Ginna
Issue date:	06/21/1976
From:	White L Rochester Gas & Electric Corp
To:	O'Reilly J NRC/IE, NRC Region 1
References
LER 1976-10-00
Download: ML18142B278 (4)

LER-2076-010, R. E. Ginna - Supplemental Report on LER 1976-10-00, R. E. Ginna Plant, Containment Purge Supply Valve Having Excessive Leakage During Testing

Event date:
Report date:
2442076010R00 - NRC Website

text

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er NRC DISTRIBUTION FDR PART 50 DOCI(ET MATERIAL DOCKET NUMBER 50 244 FILE NUMBER INCIDENT REPORT Mr James P, O'Reilly FROM:

Rochester Gas 6 Electric Corp, Rochester, New York L, D White, Jr~

DATE OF DOCUMENT 6/21/76 DATE RECEIVED e/23/7e ETTER PfOBIGINAL OCOPV

DESCRIPTION

0 NOTOR IZED UN C LASS IF I E 0 PROP INPUT FORM ENCLOSU BE /.i NUMBER OF COPIES BFCEIVED one signed PLANT NAME; Ginna fl (1-P)

Ltr re Licensee Event Report (RO 50-244/76-

10) on 3/22/76 furnishing 'supplemental report regarding Containment Purge Supply Valve havin e'xcessive leakage during testing.

ACKNOWLEDGED,.

DO NOT REMOVE NOTE:

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89 EAST AVENUE, ROCHESTER, H.Y. 14649 LEON O. WHITE, JR.

VICE PRC5IDCNT b

Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission I'ffice of Inspection and Enforcement"--

Region I 631 Park Avenue King of.Prussia, Pennsylvania.

19406 xJune 21, 1'9 6

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Subject:

Qoc~~g. 768 i,egg a oPJ

Dear Mr. O'Reilly:

Supplemental report on Reportable Occurrence 76-10; Containment purge supply valve excessive leakage during testing R. 'E. Ginna Nuclear Power Plant, Unit No.

1 Docket No. 50-244 In the March 22, 1976 Reportable Occurrence 76-10, 30-day report, we described corrective action to permit proper closing of one of the containment purge supply valves, and the subsequent satisfactory retesting.

We also stated that during the refueling shutdown that was in progress, the valve operator assembly was to be dismantled and inspected with the services of a vendor representative.

The vendor representative was on site March 24 for this purpose.

In connection with his inspection of the Henry Pratt 48" purge supply valve, the vendor representative observed its operation, made valve seat retaining segment adjustments and applied lubricant to the valve seat and the operator spring cannister.

He observed that the valve seat was in good con-dition and that the disk edge and seat retaining segments were clean and in good condition.

He recommended that the valve operator not be dismantled at this time and that a complete inspection be done when the necessary replace-ment parts are available.

He stated that the valve would give continued proper service in the meantime.

The valve was leak tested satisfactorily before unit heatup began in the first part of April. The,.valve was leak tested satisfactorily.a second time May 3, before heatup after a unit outage to plug a leaking steam generator tube.

Two additional copies of this letter are enclosed to conform to the original submittal of Reportable Occurrence 76-10, 30-day report.

Very truly yours, cc:

Dr. Ernst Volgenau (30)

Mr. William G. McDonald (3) p

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L. D, Whit Jr.

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