ML20129E157
| ML20129E157 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 04/05/1985 |
| From: | Mcdonald R ALABAMA POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-83-03, IEB-83-3, NUDOCS 8507160745 | |
| Download: ML20129E157 (2) | |
Text
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AlaDama Power Company 600 North 18th Street Post Of fice Dom 2641 Birmingham. Alabama 35291 Tetephone 205 783-6090
} [f] g 4 [. g R. P. Mcdonald Sensor Vice President AlalXUllaPOWer Flinttidge Buildeng Docket No. 50-364 April 5, 1985 Dr. J. N. Grace Regional Administrator U. S. Nuclear Regulatory Commission i
Region II, Suite 3100 101 Harletta Street, N. W.
Atlanta, Georgia 30303 Joseph H. Farley Nuclear Plant - Unit 2 IE Bulletin 83-03 Centlemen:
Pursuant to the requirements of IE Bulletin (IEB) 83-03, Alabama Power Company submitted its initial report on diesel generator cooling water check valve integrity to the Nuclear Regulatory Commission by letter dated June 10, 1983. This initial report provided_a list of the affected check valves, initial valve integrity verification method, schedule for implementation and valve maintenance history.
By letter dated November 17, 1983, Alabama Power Company provided a description of actions taken during the Unit 2 second refueling outage which was completed October 24, 1983. During this outage, the Service Water System Train A was drained and the three 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. By letter dated June 1, 1984, Alabama Power Company reported that one degraded swing check valve (12 inch outlet) was found after inspection of all five (5) applicable check valves in Unit 1.
Based on this finding, Alabama Power Company committed to inspect the remaining Unit 2. Train B check valves during the third refuelin8 outage.
The Unit 2 third refueling outage began January 4, 1985 and was completed on March 20, 1985. During this outage, the Service Water System Train B was drained and the two remaining check valves (one 6 inch inlet and one 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.
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8507160745 850405 PDR ADOCK 05000364 G
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Dr. J. N. Grace April 5, 1985 U. S. Muclear Regulatory Commission Page 2 Each valve was also disassembled and individual components were exanined for evidence of wear or degradation similar to that described in the bulletin. The inlet check valve is 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 va?.ve 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 two 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.
With completion of the inspections described above, a?.1 diesel generator service water check valves in both units have been inspected pursuant to IEB 83-03.
Therefore, this report completes Alabama Power Company's response to the bulletin. Future inspections of the service water system check valves which supply cooling water to the diesel generators in each unit will be made in accordance with the augmented Inservice Testing Program requirements described in Alabama Power Company's letter dated June 1, 1984.
Yours truly, f
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r R. P. Mcdonald RPM / STB:drs/D-354 cc:
Mr. L. B. Long Mr. S. A. Varga Mr. E. A. Reeves Mr. W.11. Bradford Sworn to and subscribed before me the [
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