ML20086G026
| ML20086G026 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 08/27/1975 |
| From: | Meyer R PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Boyd R Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20086G029 | List: |
| References | |
| AO-75-56, NUDOCS 8401100022 | |
| Download: ML20086G026 (2) | |
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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET. STREET PHIL'ADELPHI A. PA.19101 (21518414000 August 27, 1975 Mr. Roger S. Boyd Acting Director Division of Reactor Licensing 0f fise of. Nuclear. Reactor Regulations United States Nuclear Regulatory Comnission
)
Washington, DC 20555 i
Dear Mr. Boyd:
1
Subject:
Abnormal Occu rence l
The following occurrence was reported to Mr. Jim Part1ow, Region 1, Office of Inspection and Enforcement, 'Jnited States Nuclear Regulatory Commission on August 17, 1975 Written notification was made to Mr. James P. O'Reilly, Region I, Of fice of Inspection and Enforcement, United States Nucicar Regulatory Commission on Augast 18, 1975 In accordance with Section 6.7 2.A of the Technical Speci-fications, Appendix A of DPR-44 for Unit 2 Peach Bottom Atomic Power Station, the following report is beinj submitted to the Directorate of Reactor Licensing as an Abnormal Occurrence.
Reference:
License Number DPR-44 Technical Specification
Reference:
4.7.B.3.a Report No.:
50-277-75-56 l
Report Date:
August 27, 1975 l
Occurrence Date: August 17, 1975 i
Facility:
Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania 17314 Identification of Occurrence:
Standby Gas Treatment System Fan (0BV20) f ailed to "AUT0" start.
C_onditions Prior to Occurrence:
Unit 2 shutdown.
Description of Occurrence:
During the performance of ST 1 3, PCIS Logic Syste[n Functional Test, the "B" fan failed to "AUT0" start with the "A" fan in " Pull To Lock" and a reactor building ventilation isolat, ion signal.
0401100022 750827 DR ADOCK 050002 93217
.feh tiENT REGION '
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Mr. R. S. Boyd August 27, 1975 Page 2 i
Designation of Apparent Cause of Occurrence:
3 The dP switch DIS-00014 which actuates the "B" f an was found stuck in the open position. This precluded activating the logic circuitry for the "B" fan start.
Analysis of Occurrence:
During the test on the reactor building ventilation isolation-signal the "A" SBGTS f an started automatically.
In addition, the "B" fan operated satisfactorily manually.
Safety implications are, therefore, minimal.
Corrective Action:
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Corrective maintenance was performed on actuator plate hinge and the auto start mode for the "B" fan tested satisfactorily several times.
l Failure Data:
A previous failure of this type was reported as A0-50-277-75-40.
Very truly yours, g
ddC-f ' cit R. D. Meyer i
General Superintendent 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 i
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