ML20086H733
| ML20086H733 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 06/30/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20086H736 | List: |
| References | |
| AO-75-47, NUDOCS 8401200167 | |
| Download: ML20086H733 (2) | |
Text
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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET g,
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June 30, 1975 i,,3
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f Mr. A. Giambusso
'i,k,%O' Director Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Giambusso:
Subject:
ALnormal Occurrence The following occurrence was reported to Mr. Walt Baunack, Region 1, Office of Inspection and Enforcement, United States Nuclear Regulatory Cormiission on June 20, 1975 Written notification was made to Mr. James P. O'Reilly, Region 1, Of fice of Inspection and Enforcemenc, United States Nuclear Regulatory Commission on June 20, 1975 In accordance with Section 6.7 2.A of the Technical Specifications, Appendix A of DPR-% for Unit 2 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-%
Technical Specification
Reference:
3 7.0 Report No.:
50-277-75-47 Report Date:
June 30, 1975 Occurrence Date: June 20, 1975 Facility:
Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania 17314
_ Identification of Occurrence:
Reactor Watu Cleanup Inlet Outboard Isolation Valve M0-2-12-18 inoperable electrically.
Conditions Prior to Occurrence:
Unit 2 reactor shutdown.
Description of Occurrence:
Reactor Water Cleanup System M0-2-12-18 failed to operate electrically from the main control room switch. The valve was in the open position and the Reactor Water Cleanup System was in operation prior to the occurrence.
8401200167 750630 Q[jjj PDR ADOCK 05000277 8
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50-277-75 47 June 30, 1975 Pcg2 2 Designation of Apparent Cause of Occurrence:
Failure of the valve motor.
Examination indicated water had entered the motor and caused armature failure. The moisture entry into tha motor was caused by a valve stem packing leak, which had occurred approximately 2 weeks previous to the motor failure.
Analysis of Occurrence:
Since the other isolation valve in this line is operable, the safety implications are minimal. Both Reactor Water Cleanup inlet isolation -valves did isolate on a PCIS Group 2 isolation wFich occurred on a reactor scram several hours earlier.
Corrective Action:
A replacement motor was installed, the operator adjusted and proper valve operation was verified.
Failure Data:
Nane previous.
Very truly yours, 5ooney As t Gen't S erintendent Generation Division cc:
Mr. J. P. O'Reilly Director, Region 1 Office of Inspection and Enforcement United States Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 6
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