ML20086G278
| ML20086G278 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom, 05002787  |
| Issue date: | 07/30/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| AO-75-54, NUDOCS 8401110074 | |
| Download: ML20086G278 (2) | |
Text
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i PHILADELPHIA ELECTRIC COMPANY j
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2301 MARKET STREET
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PHILADELPHI A. PA.19101 I
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(2151 e41-4000
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July 30, 1975 7
D Mr. A. Giambusso, Di rector Division of Reactor Licensing fg g
Office of Nuclear Reactor Regulations d[/g/g,j,,gi TS United States Nuclear Regulatory Commission Washington, D.C.
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Dear Hr. Giambusso:
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Subject:
Abnormal Occurrence t
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The following occurrence was reported to Mr. Tom Shedlowsky, g... f,.;
Region 1, Office of Inspection and Enforcement, United States Nuclear
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Regulatory Comission on July 21, 1975 Wri tten notification was made
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b to Mr. James P. O'Reilly, Office of Inspection and Enforcement, Region
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~ 1, United States Nucicar Regulatory Comission on July 21, 1975.
In accordance wi th Section 6.7.2.A of the Technical Specifications, Ap-chl k?
pendix A of DPR-44 and DPR-56 for Unit 2 and Unit 3 Peach Bottom Atomic Q ' Iy Power Station, the following report is being, submitted to the Direc-
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torate of Reactor Licensing as an Abnormal Occurrence. ' ~
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Reference:
License Numbers DPR-44 and DPR-56 Technical Specification
Reference:
4.B.C.1 Report No.:
M S-54 and 50-278-75-44 J_
Report Date:
July 30, 1975
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Occurrence Date: July 20, 1975 Facility:
Peach Bottom Atomic Power Station R.D. #1, Delta, Pennsylvania 17314 identification of Occurrence:
Failure of stack flow transmitters.
Condi tions Prior to Occurrence:
Both units at approximately 50% power.
Description of Occurrence:
On the evening of July 20, 1975, lightning apparently struck the main offgas stack, resulting in damage to both offgas stack flow transmi tters.
401110074 750730 DR ADOCK 05000 9
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9 50-277h5-54 & 50-278-75 44 Page 2
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, 30, 1975 Designation of Apparent Cause of Occurrence:
Lightning strike.
Analysis of Occurrence:
Flow rate up the main offgas stack during normal operationTwo di h
ti re is provided by dilution fans.to the lightning strike and remained in service during t e Therefore, period that the flow transmitters were out of service.This permits an accurate deter-total offgas stack flow is known.
d This occurrence mination of total gaseous release during this perio.
has littic safety significance'.
Corrective Acti_om An inspection in the area below the main stack was performed immediately following the failure.- Repair of the electronics wasO Repair of the second transmi tter is awaiting replacement parts.
ini ti a ted.
50-277-75-51 Previous failures of this type were reported as and 50:278-75-38.
Very truly yours, M.
. Cooney Asst. Gent. Supt.
Generation Division l
Mr. James P. 08Reilly cca Ofrector, Region 1 Office of Inspection and Enforcement United States Nuclear Regulatory Comission 631 Park Avenue PA 19406 King of Prussia,
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