ML20086K381
| ML20086K381 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 02/20/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20086K384 | List: |
| References | |
| AO-75-15, NUDOCS 8401270056 | |
| Download: ML20086K381 (2) | |
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n&cs-PHILADELPHIA ELECTRIC COMPANY ^J.' Holy ^g,
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February 20,1975 Mr. A. Giambusso Director Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nuclear Regulatory Cce:nission Washington, D.C.
20555
Dear Mr. Gianbusso:
Subject:
Abnor.nal Occurrence The follo: ring occurrence was reported to Mr. Valt Baunack, Office of Inspection and Enfortcruent, Region 1, United States Nuclear Regulatory Cc: mission on February -11,1975. Written notification was made to Mr. James P. O'Reilly, Office of Inspection and Enforcetent, Region 1, United States Nuclear Regulatory Co: mission on February 11, 1975 In accordance with Section 6.7 2.A of the Technical Specifications, Appendix A of DPR-hh for Unit 2 Peach Bottom Atomic Power Station, the following report is being submitted to the Directorate of Reactor Licensing as an Abnomal Occurrence.
Reference:
License Number DPR-hh Technical Specification
Reference:
Table 3 2.B Report No.:
50-277-75-15 Report Date:
February 20, 1975 Occurrence Date:
February 10,1975 Facility:
Peach Bottom Atcciic Power Station R.D. 1, Delta, Pennsylvania 1731h
_ Identification of 0::currence:
g Setpoint shift on dPIS-2-2-138A, Recire. Pump AP which initiates LPCI loop selection logic.
2092 Conditions Prior to Occurrence:
Unit 2 at 90% power.
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Description of Gecurrence:
During mutino instrument surveillance testing, dPIS-2-2-138A was found to trip at 0 9 paid. The Technical Specification limit is 2 paid 11.
h* nation of Aeparent Cause of Occurrence:
Setpoint shift.
Analysis of Occurrence:
This minor setpoint shift has minimal safeyf implications since it is part of a one-of-two-twice logic and is also redundant in the other LPCI systet.
Corrective Action:
'Ihe cem follower was found to be defective. It was replaced, and properly aligned. The switch was recalibrated and check for proper calibration per the applicable surveillance test.
Failure Data:
This is the first failure of this type on switches in this serviCo.
Verf truly yours,
/^
M.
Cooney As t Gen'1 Supe intendent Generation Division ec: Mr. J. P. O'Reilly l
Director Office of Inspection and Enforemient Region 1 United States Nuclear Regulator / Commission 631 Park Avenue King of Prussis, PA 1 91;O 6 1