ML20086K425
| ML20086K425 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 02/15/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20086K427 | List: |
| References | |
| AO-75-13, NUDOCS 8401270084 | |
| Download: ML20086K425 (2) | |
Text
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PHILADELPHIA ELECTRIC COMPANY
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2301 MARKET STREET 3
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.L-Febmary 15,1975 Mr. A. Giambusso, Director Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nuclear Regulatory Comission Washington, D.C.
20555
Dear Mr. Giambusso:
Subject:
Abnonnal Occurrence The following occurrence was reported to Mr. Walt Baunack, Office of Inspection and Enforcema:t, Region 1, United States Nuclear Regulatory Ccmission on February 5,1975. Written notification was made to Mr. James P. O'Reilly, Office of Inspection and Enforcanent, Region 1, United States Nuclear Regulatory Ccmission on February 6, 1975. In accordance with Section 6.7 2.A of the Technical Specifications, Appendix A of DPR-hh for Unit 2 Peach Bottom Atcnic Power Station, the following report is being submitted to the Directorate of Reactor Licensing as an Abnonnal Occurrence:
Reference:
License Number DPR-hh Technical Specification
Reference:
Table 3 2.B Report No.:
50-277-75-13 Report Date:
February 15, 1975 Occurrence Date:
February 5, 1975 Facility:
Peach Bottom Atcnic Power Station R.D. 1, Delta, Pennsylvania 1731h
_ Identification of Occurrence:
Setpoint shift on RCIC Steam Line Hi Flow Isolation Switch dPIS-2-13-8h.
Conditions Prior to Occurrence:
sT, a? N Unit 2 at full power.
gn Description of Occurrence:
During routine instrument surveillance testing, dPIS-2-13-8h was found to trip at h53 inches H 0.
'Ihe Technical Specification limit 2
is f h50 inches H O differential.
2 e401270004 7so21s l'743 PDR ADOCK 05000 s
rwpx;sger REGION, m
v-Mr. A. Giambu; Febntary 15, 1975 Page 2 Designation of Apparent Cause of Occurrence:
Setpoint shift within the accuracy of the inattument.
Analysis of Or.currence:
The safety imolications are minirul since the setpoint shift was very small and the companion redundant switch was tested and found to trip within the Technical Specification limits.
' Corrective Action:
The switches were adjusted and checked for proper calibration in accordance with the applicable surveillance test.
Failure Data:
Similar setpoint shifts reported as Abnonnal Occurrence 50-277-7h-bl, 50-278-7h-21 and 50-277-7h-h9.
Very truly yours, M.
. Cooney A
t Gen'1 Supen tendent Generation Division cc Mr. J. P. O'Reilly Director Office of Inspection and Enforcenent Region i United States Huelcar Regulatory Ccmission 631 Park Avenue King of Prussia, PA 19h06 I