ML20082E554
| ML20082E554 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 11/17/1983 |
| From: | Clayton F ALABAMA POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-SSINS-6820 IEB-83-03, IEB-83-3, NUDOCS 8311280234 | |
| Download: ML20082E554 (2) | |
Text
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M iling Af4nse Alabama Power Company 600 North 18th Street Post Office Box 2641 Birmingham. Alabama 35291 Telephone 205 783-6081 F. L Clayton, Jr.
Senior Vice President Fhntridge Building Mal)allla PO\\WT Docket No. 50-364 November 17, 1983 Mr. J. P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II, Suite 3100 1
101 Marietta Street, N. W.
Atlanta, Georgia 30303 Joseph M. Farley Nuclear Plant - Unit 2 IE Bulletin 83-03
Dear Mr. O'Reilly:
Pursuant to the requirements of IE Bulletin 83-03, Alabama Power Company submitted its initial report on diesel generator check valve integrity to the Nuclear Regulatory Commission by letter dated June 10, 1983. This initial report provided a list of the affected diesel generator check valves, initial valve integrity verification method, schedule for implementation and valve maintenance history. As discussed in the referenced letter, the Unit 2 second refueling outage began September 16 and was completed October 24, 1983. During this outage, the Service Water System Train A was drained and the three accessible check valves (6 inch and 8 inch inlets and 12 inch outlet) were inspected. All valves were found to be in good operating condition with discs free to move in the fully open and shut positions.
Each valve was also disassembled and individual components were examined for evidence of wear or degradation similar to that described in the bulletin. The inlet check valves are the tilting disc type, which utilizes a disc with an integrally cast pivot arm.
Since the disc is not retained by a fastener, loosening of the disc as noted in the bulletin cannot occur. The hinge pins and hinge arm bushings were inspected and no abnormal wear was noted. The outlet check valve is the swing check type.
The fastener holding the disc to the pivot arm was found to be properly installed with no evidence of wear, degradation or loosening. The pivot arm and hinge pin components were inspected and no abnormal wear was noted. All internal parts of these three valves were removed from the valve bodies, cleaned and inspected. Following inspection, the valves were reassembled using original parts except for new cover gaskets and hinge pin gaskets.
12/
8311280234 831117 PDR ADOCK 05000364 i
G PDR 67
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Docket No. 50-364 Mr. J. P. O'Reilly November 17, 1983 Page 2 Since no evidence of abnormal degradation as described in IE Bulletin 83-03 was found, and since no other repair or replacement of components was required, the remaining two Unit 2 check valves (one 6 inch inlet and one 12 inch outlet) in Train B were not inspected. This is consistent with the commitment made to the NRC in Alabama Power Company's letter of June 10, 1983. These remaining valves are identical in manufacture, installation, environment and time in service to the Train A valves discussed above.
The Unit I fifth refueling outage is currently scheduled to begin February 10, 1984. The same inspection program will be implemented on the Unit I diesel generator check valves during this outage. Results of this inspection will be reported to the NRC as required by IE Bulletin 83-03.
Yours truly,
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'\\,F. L. Clayton, Jr.
FLCj r./ STB:kc/D-302 cc:
Mr. R. A. Thomas Mr. G. F. Trowbridge Mr. S. A. Varga Mr. E. A. Reeves Mr. W. H. Bradford Sworn to and subscribed before me this /76 day of ff'A'Fn fd,1983.
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/Lm bH Notary Public
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