ML20086G256
| ML20086G256 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 04/12/1976 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| RO-76-19, NUDOCS 8401100186 | |
| Download: ML20086G256 (2) | |
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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET i kl.., y PHILADELPHIA. PA.19101 s
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4 or Stello, Jr.
Director Division of Operating Reactors Office of Nuclear Reactor Regulations Uni ted States Nuclear Regulatory Commi ssion Washington, D.C.
20555
Dear Mr. Stello:
Subj ect :
Environmental Deviation The following deviation was reported to Mr. Walt Baunack, Region 1, Office of Inspection and Enforcement, Uni ted States Nuclear Regulatory Comiri ssion on April 2,1976.
Reference:
License Number DPR-44/56 Environmental Technical Specification:
2.1 Repor t No. :
50-277/278-76-19 Report Date:
April 12, 1976 Deviation Date: April 2, 1976 Facility:
Peach Bottom Atomic Power Station Units 2 and 3 R.D. 1, Delta, PA 17314 Identi fication of Deviation:
Two cooling towers simultaneously inoperable.
Conditions Prior to Deviation:
Unit 3 operating at full power.
Unit 2 off for refueling outage. The "A" cooling tower was out of service due to a previous lif t pump failure. The "C" cooling tower was full'y operable during the outage. The "L" fan en the "B" cooling tower was out of service due to a previous failure of the gear reducer drive unit.
Ri ver flows approximately 46,000 CFS.
8401100186 760412 PDR ADOCK 05000277 S
PDR bC,NY 00PY SENT REGION _
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Mr. Victor Stello, Jr.
50-277/278-76-19 April 12, 1976 Page 2 Description of Deviation:
The "E" fan on the "B" cooling tower tripped due to a high vibration si gnal.
Designation of Apparent Cause of Deviation:
' Worn motor bearings and seized line bearing box.
Analysis of Deviation:
Due to the reduced plant power level and the remaining capacity of the "B" cooling tower with nine fans still operable no change beyond the limits of background variations in measured discharge temperature was observed.
Corrective Action:
The "L" fan was returned to service on April 2,1976 thus restoring the cooling tower to operable status.
Failure Data:
Several previous similar occurrences.
Very truly yours, i
M.
Coo ney Su erintendent Generation Divi sion - Nuclear cc:
Mr. J. P. O 'Reilly Director, Region 1 Office of Inspection and Enforcement U.S. Nuclear Regulatory Commi ssion 631 Park Avenue King of Prussia, PA 19406 m
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