ML20086G871
| ML20086G871 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 06/30/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20086G873 | List: |
| References | |
| AO-75-35, NUDOCS 8401120551 | |
| Download: ML20086G871 (2) | |
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PHILADELPHIA ELECTRIC COMPANY x.
2301 MARKET STREET s
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PHILADELPHIA. PA.19101 O
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June 30, 1975'
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Mr. A. Giambusso, Director Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nucicar Regulatory Commission Washington, D. C.
20555
Dear Mr. Giambusso:
SUBJECT:
Abnormal Occurrence The following occurrence was reported to Mr. Jim Partlow, Region 1, Office of Inspection and Enforcement, United States Nucicar Regulatory Commi ssion on Jur,e 22, 1975. Written notification was made to Mr. James P.
O'Reilly, Office of Inspection and Enforcement, Region 1, United States Nucicar Regulatory Coninission on June 23, 1975 In accordance with Section 6.7.2.A of the Technical Specifications, Appendix A of DPR-56 for Unit 3 Peach Bottom Atomic Power Station, the following occurrence is being submitted to the Directorate of Reactor Licensing as an Abnormal Occurrence.
Reference:
License Number DPR-56 Technical Specification
Reference:
3 5.B.1 Report No.:
50-278-75-35 Report Date:
June 30, 1975.'
Occurrence Date:
June 20, 1975' Faci li ty:
Peach Bottom Atomic Power Station s
R.D. 1,'De lta, Pennsy lvania 17314
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Identificatl'on of Occurrence:
- Mo.10-89C Kigh pressure service water out let valv[ motor of RHR hea t c). changer tripped on thermal overlor.d.
Conditions Prior to Occurrence:
+ Uni tTt 50% power.
' I Description of, Occurrence:
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j Dui-ing surveillance testing of the high pressure service water system, i
M0-10-89C m'otor' tripped on thermal overload.
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8401120551 750630
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PDR ADOCK 05000278
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Mr. A. Giambusso 50-278-75-35 JuE' 30, 1975 Pa ge,2 n
Designation of Apparent Cause of Occurrence:
Examination indicated moisture had accumulated in the MO-10-89C j
motor, causing the motor to trip electrically. A previously repaired M0-10-89C valve stem packing Icak is suspected to have caused the water accumulation in i
the motor.
Analysis of Occurrence:
There were minimal safety implications associated with this failure.
The valve is used only in the shutdown cooling or torus cooling mode of operation, neither of which is required with the unit at power. As well, the valve remained mechanically operable and could be manually positioned as required.
. Corrective Action:
The motor was dried out and returned to service af ter proper operation was verified.
i Failure Data:
Previous failures reported as A0-277-75-24, 278-75-5, 278-74-36, j
277-74-13, 278-74-17, and 277-74-53 Very truly yours?,
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M.
. Cooney As
't. Gen'1.
uperintendent Generation Division cc: Mr. J. P. O'Reilly Director, Region 1 Office of Inspection and Enforcement United States Nuclear Regulatory Commission 631 Park Avenue
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King of Prussia, Pennsylvania 19406 9
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