ML18142B278

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)

Text

NRP~F.OBM,-1 95 U.S. NUCLEAR REGULATOR MMISS ION DOCKET NUMBER I2.76) ~ er 50 244 FILE NUMBER NRC DISTRIBUTION FDR PART 50 DOCI(ET MATERIAL R

INCIDENT REPORT FROM: DATE OF DOCUMENT Rochester Gas 6 Electric Corp, 6/21/76 Mr James P, O'Reilly Rochester, New York DATE RECEIVED L, D White, Jr~ e/23/7e ETTER 0 N OTOR IZE D PROP INPUT FORM NUMBER OF COPIES BFCEIVED PfOBIGINAL UN C LASS IF IE 0 OCOPV one signed DESCRIPTION ENCLOSU BE /.i 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 (1-P)

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ROCHESTER GAS AHD ELECTRIC CORPORATION ~ 89 EAST AVENUE, ROCHESTER, H.Y. 14649 LEON O. WHITE, JR.

VICE PRC5IDCNT xJune 21, 1'9 6 b

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

I'ffice Region I 631 Park Avenue King of .Prussia, Pennsylvania. 19406 6'

Subject:

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. 50-244 768 Qoc~~g.

Dear Mr. O'Reilly:

i,egg a oPJ 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,

~

p L. D, Whit Jr.

cc: Dr. Ernst Volgenau (30)

Mr. William G. McDonald (3)

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