ML20086K405
| ML20086K405 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/29/1974 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| AO-74-38, NUDOCS 8401270073 | |
| Download: ML20086K405 (2) | |
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PHILADELPHIA ELECTRIC COMPANY
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pp July 29, 1974 Mr. A. Giambuss 50-277 Deputy Director of Reactor Projects United States Atomic Energy Cormiission Directorate of Licensing Washington, DC 20545
Dear Mr. Giambusso:
Subject:
Abnormal Occurrence The following occurrence was reported to Mr. Donald Caphton, A.E.C. Region I Regulatory Operations Office on July 19, 1974. Writ-
' ten notification was made to Mr. James P. O'Reilly, Region I Regulatory Guc aiivn= Giii< e on.soiy i s, i9fh.
in arcordaaca '." t h Sectien 6.7.2.P.
of the Technical Specifications, Appendix A of DPR-44 for Unit 2 Peach Bottom Atomic Power Station, the following report is being ;ubmitted to the Directorate of Licensing as an Abr,armal Occurrence.
Reference:
License Number DPR-44, Amendment Number 1
' Technical Specification Table 3 5.B Report No.:
50-277-74-38 Report Date:
July 29, 1974 Occurrence Date:
July 19, 19/4
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Facility:
Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania 17314 Identificatien of Occurrenc.e:
Setpoint of the Core Spray Sparger to Reactor Vessel differ-ential pressure switch, dPIS-2-14-438, found to be less conservative than allowed by the Technical Specifications.
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_ Conditions Prior to Occurrence:
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a The reactor was at 100% power.
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Mr. A. Giambuss
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j Description of Occurrence:
During a routine instrument surveillance test the setpoint of dPIS-2-14-438 was found to have drifted outside the Technical Specification limits of 5 + 1 5 psid. The switch was found to trip at 6.7 psid.
Designation of Apparent Cause of Occurrence:
The cause of this setpoint failure is attributed to slight setpoint drift.
Analysis of Occurrence:
Due to the slight magnitude of the setpoint deviation, this occurrence has minimal safety implications.
Corrective Action:
The switch was immediately recalibrated and returned to service.
Very truly yours, J)V ' uw
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J,. C'o' ne'y o
3 Ass,' t Gen' 1 Superin'tendent.
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Generation Division ~
cc:
Mr. J. P. O'Reilly Director,. Region 1 linited States Atomic Energy Commission K ng of P us a, PA 19406 i
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