ML20085F813
| ML20085F813 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 08/14/1975 |
| From: | Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20085F815 | List: |
| References | |
| RO-75-009, RO-75-9, NUDOCS 8308230305 | |
| Download: ML20085F813 (2) | |
Text
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Division of Reactor Licensing
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US Huclear Regulatory Comission g
Washington, DC 20555 A
(A DOCKET 50-255, LICENSE DPR-20, PALISADES PLANT, UE-75-9 Attached is Unusual Event Report No. 75-9 covering high cylinder and exhaust temperatures associated with the operation of a Palisades diesel generator.
Os David A. Bixel (Signed)
David A. Bixel Assistant Nuclear Licensing Administrator CC: JGKeppler, USNRC C6 ' S[ s i
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O' UNUSUAL EVENT REPORT Palisades Nuclear Plant 1.
Report Number:
UE-75-9, Docket 50-255 2a. Report Date:
August 14, 1975 2b. Occurrence Date:
August 4, 1975 3
Facility:
Palisades Plant, Covert, Michigan 4.
Identification of Occurrence: Diesel Generator 1-1 high cylinder and exhaust temperatures.
5 Conditions Prior to Occurrence: Plant operating at steady-state power of 60%.
6.
Description of Occurrence: During the monthly testing of Diesel Generator -
1-1 (August 4,1975) cylinder temperatures reached approximately 1100 F after 15 to 20 minutes of operation. The diesel generator was fully loaded at 2 5 We.
Typical operating temperatures are 950 to 1000 F with temperatures as high as 1200 F considered acceptable although not desirable.
The diesel generator load test was terminated and the unit declared inoperable in accordance with Palisades Technical Specification 3 7 (1).
7 Designation of the Apparent cause of the Occurrence: Failure of a
( j bellows support bracket resulted in an exhaust manifold bellows failure.
This failure caused a decreased exhaust flow to the turbosupercharger (which regulted in a low air intake manifold pressure) and an increase of about 100 F in the cylinder temperatures.
8.
Analysis of Occurrence: The Palisades Technical Specification permits the diesel generator to be out of service for a limited period of time. In addition, if the diesel would have been required it would have been placed in service and would perform its design function.
9 Corrective Action: The bellows support bracket was repaired and new exhaust manifold bellows installed.
In addition, the diesel generator testing procedures are being reviewed with respect to acceptable cylinder wall temperatures.
i 10.
Failure Data: No previous failure of this type have been recorded.
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