ML20086G426
| ML20086G426 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 09/22/1975 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086G425 | List: |
| References | |
| AO-50-277-75-62, AO-50-278-75-61, NUDOCS 8401110395 | |
| Download: ML20086G426 (1) | |
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PHILADELPHIA ELECTRIC COMPANY Peach Bottom Ato=ic Power Station Delta, Pennsylvania i??lk Mr. James P.. O'Reilly, Director
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Office Of Inspection and Enforcenent 1.
Begion 1 United States suelear Regulatory Comnission, hg M4W}"%I.Cs(
631 Park Avenue King of Prussia, Pennsylvania 19kO6
Subject:
Abnornal Occurrence 2k-Hour Noti fi c ation Confirming V.
T. U11 rich's phone conversation with Mr. Robert McClintock, Region 1, United States 5uclear Regulatory Commission on September 21,1975
Reference:
License sunbers DPR kk and DPR-56 Technical Specification
Reference:
4.8.C.1 Report No.:
50-277-75-62 and 50-278-75-630 Report Date:
September 22, 1975 Occurrence Date:
September 20, 1975 Facility:
Peach Bottom Atomic Power Station R.D.
1, Delta, Pennsylvania 1731k
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Identification of Occurrence:
d Failure of the main stack flow transmitters.
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. Conditions Prior to Occurrences i,
Unit 2 at about 555 power, Unit 3 shutdown.
Des'eription of Occurrence:
On the night of September 20, 1975, a lightning strike disabled both main' stack flow transmitters.
- Designation of Apparent Cause of Occurrence:
Lightning strike.
l Analysis of Occurrence:
Flow rate prior to the strike was known and was being supplied by two i
dilution fans.
These fans rensined on during the short time that the f
transmitters were out of service, so total stack flow during this perioc is known.' This occurrence has minimal safety implications.
Corrective Action:
l The damaged conponents were replaced and the transmitters were returned to service.
I Failure Data:
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Previous failures of this type were reported as 50-277-75-51, 50-278-75-38, 50-277-75-5k, and 50-278-75 hk.
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Very truly yours, j f & h g.e d f W.
T.
Ullrich, Superintendent Peach Botton Atomic Power Station 8401110395 750930 PDR ADOOK 05000277 PDR s
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