ML20086H641
| ML20086H641 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/08/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20086H645 | List: |
| References | |
| AO-75-25, AO-75-31, NUDOCS 8401190503 | |
| Download: ML20086H641 (2) | |
Text
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PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET PHILADELPHIA. PA.19101 (215)841-4000 May 8, 1975 Mr. A. Giambusso Director Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nuclear Regulatory Conmission Washington, DC 20555
Dear Mr. Giambusso:
Subject:
Abnormal Occurrence The following occurrence was reported to Mr. Walt Baunack, Region 1, Office of Inspection and Enfcrcement, United States Nuclear Regulatory Commission on April 29, 1975 Written notification was made to Mr. James P. O'Reilly; Region 1, Office of Inspection and Enforcement, United States Nuclear Regulatory Commission on April 29, 1975 In accordance with Section 6.7 1.A of the Technical Specifications, Appendix A of DPR-44 and DPR-56 for Unit 2 and Unit 3 Peach Bottom Atomic Power i
Station, the following report is being submitted to the Directorate of Reactor Licensing as an Abnormal Occurrence.
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Reference:
License Namber DPR-44 and'DPR-So Technical Specification
Reference:
3 9.B.3 Report No.:
50-277-75-31 and 50-278-75-25 Report Date:
May 8, 1975 Occurrence Date: April 28, 1975 Facility:
Peach Bottom Atomic Power Station R.D.1, Delta, Pennsylvania 17314 Identification of Occurrence:
Failure of the E-2 diesel generator.
Conditions Prior to Occurrence:
Unit 2 at 92% power; Unit 3 at 100%.
Description of Occurrence:
The E-2 diesel generator failed to flash its field during a starting sequence, resulting in the inability of the' generator to sustain any load.
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8401190503 750508
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'd 77-75-31/50-278-77 25 Mr. A. Giambusso May 8, 1975 Page 2 Designation of Apparent Cause of Occurrence:
A small particle of dirt or other foreign material is be-lieved to have. interfered with the field flashing logic relays.
The contacts were manually cycled and the diesel generator was restarted successfully.
Analysis of Occurrence:
The safety implications of this occurrence are minimal be-cause this' occurrence had no ef fect on the remaining diesels and one -
diesel is considered redundant.
In addition, the amount of tine that the diesel was inoperable was less than an hour.
The manual cycling of the ficid flashing relays was followed immediately by two satis-factory start s.
Corrective Action:
The manual cycling of the field flashing relays apparently removed the suspect particle of foreign material because the correct logic sequence was witnessed during subsequent starts. This diesel was started and synchroni zed for the next three days following this occurrence and operated properly on each occasion. The normal full load surveillance. test was performed satisfactorily on May 5, 1975 Failure Data:
No previous failures of this type.
Very truly yours, M.
'. C oon ey As t Gen'l Superintendent Generation Division cc:
Mr. J. P. O'Reilly, Director Regi on i Office of Inspection and Enforcement United States Nuclear Regulatory Commission 631 Park Avenue King of' Prussia, PA 19406 O
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