ML20099E395
| ML20099E395 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 11/05/1984 |
| From: | Keiser H PENNSYLVANIA POWER & LIGHT CO. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| PLAS-005, PLAS-5, NUDOCS 8411210276 | |
| Download: ML20099E395 (2) | |
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o PPat SUSQUEHANNA STEAM ELECTRIC STATION' November 5, 1984 Dr. Thomas E. Hurley Regional Administrator, Region 1 U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 SUSQUEHANNA STEAM ELECTRIC STATION SPECIAL REPORT "C" DIESEL POWER FLUCTUATIONS ER 100450 FILE 841-23 Docket No.
50-387 PLAS-005 License No. NPF-14
Dear Dr. Murley:
All Diesel Generator Unit failures, valid or invalid, are to be reported as required by Regu?atory Guide 1.108, Section C.3.b, and Technical Specification 4.8.1.1.3 At 1023 on October 6,1984, one-half hour into a one hour loaded run, performed in accordance with Surveillance 50-024-001, the "C" Diesel tripped and alarms indicated over excitation. Upon restart the diesel was again loaded.
During the run the output varied from 2 to 5.5 MW.
Although the output was fluctuating, the one hour loaded run was com-pleted. The electronic governor was determined to be the problem for the power fluctuating. The governor wa s replaced by Work Authorization (WA) #S48198. At 1813,the diesel was started and successfully loaded for one hour.
The governor has been sent to Woodward Governor Co. for evaluation.
Until a report is received, a determination can not be made whether the governor problem will af fect the diesel in the emergency mode of operation.
It the electronic governor problem can be definitely attributed to a malfunction of equipment that is not operative in the emergency operative mode, this would not be considered a valid test or f ailure as indicated in Regulatory Guide 1.108, Section C.2.e.(2).
The problem with the electronic governor has been only noted on the "C" Clesel. The remaining three diesels have not had problems with power output fluctuations.
There have been four failures in the last one hundred starts. The diesel test interval is one start every three days, per Regulatory Guide 1.108, Section C.2.d.
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. Thls' will be.re-evaluated 'pending.-further Invest Igation of j the governor.'
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H.W.= N.elser
, Superintendent of. Plant-Susquehanna~-
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-: cc :! Mr[R.H.Jacobs
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Senior Resident inspector
--U.S. Nuclear Regulatory ~ Commission PO Box 52 Shickshinny,-PA' 18655
~U.S. Nuclear Regulatory Commission:
. Document. Control. Desk Washington, DC '20555 I
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