ML18142A956
| ML18142A956 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 08/05/1976 |
| From: | White L Rochester Gas & Electric Corp |
| To: | O'Reilly J NRC/IE, NRC Region 1 |
| References | |
| BL-76-006 | |
| Download: ML18142A956 (2) | |
Text
'z/g~pg~l!riRIIIf,',"j/'~'!5ZI ROCH ES TER GAS AND ELEC TRIC CORPORATION f I,~ ~
89 EAST AVENUE, ROCHESTER, H.Y. Id649 LEON O. Wl<ITK.JB.
VICE! PAKSIOENT TCLKf'HONC AAI'Acoo@ vlci 54G '7700 August 5, 1976 Nr. James P. O'Reilly, Director U.S. Nuclear Regulatory Commission Office of Xnspection and Enforcement Region X
631 Park Avenue King of Prussia, Pennsylvania 19406
SUBJECT:
IE Bulletin No. 76-06 R.E. Ginna Nuclear Power Plant Unit No.
1 Docket No. 50-244
Dear Nr. O'Reilly:
This is in reply to your letter of July 21, 1976 requesting action regarding ZE Bulletin No. 76-06.
A xeview of the insulation and maintenance. of safety related diaphragm operated relief valves in-stalled in high temperature, fluid systems at. Ginna Station has been performed.
The following are the results of that review:
1.
The only safety xelated diaphragm operated relief valves installed in high temperature fluid systems at Ginna Station are the pressurizer power operated relief valves.
They are Copes-Vulcan, 2 inch, 1500 lb., U.S.A. Standard Valve Assem-blies, with model D-100-160-2 1/2 diaphragm operators.
There is no insulation installed on the operators of these valves.
2.'he diaphragm operators on these valves are pxessurized and inspected for air leakage; and tested for operability at each annual refueling outage.
The maintenance procedures for these valves will be revised prior to the 1977 refueling out-age to include inspection of the diaphragms for deterioration.
3.
The diaphragms installed in the operators of these valves are fabric-reinforced Buna-N rubber.
The vendor's recommended service life for this material is 100,000 to 200,000 cycles at 80'P; and the recommended shelf life is 5 years.
Due to the
ROCHESTER GAS PHD ELECTRIC CORP.
DATE August 5, 1976 Mr. 0'eilly o.
SHEET HO.
2 very limited service use at Ginna Station, these valves have been subjected to very few cycles.
Spare diaphragms currently in stock will be inspected prior to the 1977 refueling outage to ensure that their recommended shelf life has not been ex-ceeded.
Very truly yours, Leon D. White, Jr.
LDW/cern xc:
NRC Office of Inspection and Enforcement Division of Reactor Inspection Programs Washington, D.C.
20555