ML20235H749
| ML20235H749 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 07/06/1987 |
| From: | Mcdonald R ALABAMA POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8707150248 | |
| Download: ML20235H749 (2) | |
Text
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t Alabama Power Company 600 North 18th Street Post Office Box 2641 BirrNngham. Alabama 35291-0400 Telephone 205 250-1835 m
R. T' Mcdonald Senior Vece President Alabama Power the southern electnc system 10CFR50.36 July 6, 1987 Docket Nos. 50-348 50-364 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.
20555 Gentlemen:
Joseph M. Farley Nuclear Plant - Units 1 and 2 Annual Diesel Generator Reliability Data Report Attached is the Annual Diesel Generator Reliability Data Report which is submitted in accordance with Technical Specification 6.9.1.12.
This report provides the number of tests (valid or invalid) and the number of failures for each diesel generator at Farley Nuclear Plant for 1986. Also provided is the information identified in Regulatory Position C.3.b of Regulatory Guide 1.108, Revision 1, 1977 for each failure.
T Respectfully ubmi tt ed,
l
/G,/
f-R. P. Mcdonald i
RPM / JAR: dst-D-T.S.4 Attachment i
1 cc: Mr. L. B. Long Dr. J. N. Grace Mr. E. A. Reeves j
Mr. W. H. Bradford j
8,70715024G 8,70706 y
l
ATTACHMENT ANNUAL DIESEL GENERATOR RELIABILITY DATA REPORT FOR 1986 This diesel generator (DG) reliability report for the year 1986 is submitted in accordance with Technical Specification 6.9.1.12.
Table 1 shows the number of tests (valid or invalid) and the number of failures for each of the five DGs at Farley Nuclear Plant.
TABLE 1 Diesel Generator 1-2A 1B 2B 1C 2C TOTAL Valid Successful 35 33 35 34 30 167 Tests Invalid Tests 20 21 23 21 19 104 t
Failures 0
0 0
0 1
1 The following paragraphs provide the information identified in Regulatory Position C.3.b of Regulatory Guide 1.108, Revision 1,1977 for the failure identified above.
2C DG Failure on 5-12-86 At 1350 on 5-12-86, the 2C DG was started to perform an operability test.
Upon starting, the plant operator noticed that no frequency or voltage was indicated.
However, speed indication and DG status lights functioned 4
correctly. The control power fuses and control circuits were checked and no problem was found.
The DG was restarted and it tripped due to overspeed.
No cause for the trip was discovered. The overspeed trip switch was reset.
The field flashing circuit was checked and the K1 field flashing relay was manually operated.
The DG was restarted and proper indications were received locally and on the emergency power board. The DG was returned to service at 1955 on 5-12-86. The K1 relay was checked again later in the shift and was verified to be operating properly.
No correlation between the overspeed trip and loss of indication could be found.
This was the first failure in the last 100 starts for this type of DG.
No change in the surveillance schedule was necessary. The surveillance interval remained at fourteen days in accordance with Technical Specification Table 4.8-1.
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