ML19319E422
| ML19319E422 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/10/1976 |
| From: | David Williams ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19319E410 | List: |
| References | |
| FOIA-79-149 NUDOCS 8004100702 | |
| Download: ML19319E422 (4) | |
Text
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I-Reportable Occurrence Report No. 50-313/76-33 4
2.
Report Date: 12/10/76 3.
Occurrence Date: 11/22/76 4
Facilit(: A'rkansas Nuclear One-Unit 1 Russellville, Arkansas 5.
Identification of Occurrence:
i Diesel Generator #1 inoperable.
6.
Conditions Prior to Occurrence:
Steady-State Power X
R6 actor Power 2568 MWth Hot Standby Net Output 837 MWe Cold Shutdown Percent of Full Power 100 N
Refueling Shutdown Load Changes During Routine
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Power Operation Routine Startup Operation Routine Shutdown Operation s.
Other (specify) i 1
1 F
7.
Description of Occurrence:
At 1615 hours0.0187 days <br />0.449 hours <br />0.00267 weeks <br />6.145075e-4 months <br /> on November 22, 1976, an inadvertant trip of the fire system deluge while being returned to service rendered Diesel Generator
- 1 inoperable due to wet control circuitry.
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8004100 7 02 NSP-III-2, Rev. 5 Attachment "D" 5
October 1',2 1976-Page 2 of 4
w Reportable Occurrence Ps port No. 50-313/76-33 e
4 8
Designation of Apparent Cause of Occurrence:
Design Procedure Manufacture Unusual Service Condition Including Environmental Installation /
Construction Component Failure.
(See Failure Data) 5 Operator Other (specify)
X An apparent leak off of sealing pressure to deluge valve when system was taken out of service for modifications. -
d 9.
Analysis of Occurrence:
A surveillance was performed on Diesel Generator #2 which was proven operable, hence no hazard to the health and safety of the public.
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j October 1,_1976 NSP-III-2, Rev. 5 Attachment "D" 5
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Reportable Occurrence Report No. 50-313/76-33 4
10.
Corrective Action:
The Engine Control Cabinet and exciter control cabinet were dried and the generator and cables were meggered for proper readings. A test was performed for proper operation and checked satisfactory. Diesel Generator
- 1 was ready for service at 1452 hours0.0168 days <br />0.403 hours <br />0.0024 weeks <br />5.52486e-4 months <br /> on November 23, 1976.
Before fire system is to be returned to service the isolation valve to the deluge valve will be shut to ensure sealing pressure and then reopened.
4 11.
Failure Data:
None.
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