ML20086K454
| ML20086K454 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/03/1974 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086K451 | List: |
| References | |
| AO-74-36, NUDOCS 8401270121 | |
| Download: ML20086K454 (1) | |
Text
. kg Q July 3, 1974 o-O 4
Kr. James P. O'Reilly,
- ector, United States Atocic Pnergy Cemiccion Directorate of Regulatory Operations 631 Park Avenue King of Prussia. Pennsylvania 194Cf Abnor-Al Occurrence 2f+-Hour Notification
Subject:
R. S. Pleiecheann'a phone convercation with Mr. Tom Shedlovaky Confir:ein6 A.E.C. Region 1 Regulatory Operatiene Office on July 3,1974 Licence Nu=ber DPR 44, Amendmen't Number 1
Reference:
Technical Specifi n tion Table 3 1.1 Report No.:
50-277-74-36 Report Date:
July 3.197!+
Occurrence Date July 2, 1974 Peach Bottca Atomic Power Station Facility:
R.D, 1, Delta, Pennsylvania 1731 i
per v lv n5 ca tor HiEh Preasure Gcras evitch and a Drysell High Precaure Scran entch.
. Conditions Prior to Occurrence:
i Reactor at 99% power.
c Deceription of Occur'rence:
Daring routine instrue.cnt curveinance testing, PS-2-2-3-55c (acactor High d ed out of cervice, Ic.ediate Preocure Scram avt tch) was oun ted instrumento revealed that another t
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it h Designation of Apparent Cause of Occurrence:The cauce for these occurrence instrumento to service cubcequent to performing surveillance tents.
Analycia of Occurrence:
Each of thece ovitches is part of a ceparate one-out-of-two-tvice ecran logic, and the defcating of any one cvitch in either logic would not haveTh defeated the safety systen logic.
cafety i=plications.
Corrective Action:
All other surveilbnce tested instrumente were checked for proper valve 4
The instrrent technicians were advised of the lineup i-=cdiately.
importance af verifying preper valve line-up followins ca$> tent.
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Failure Dita:
on instro btli hoverk by This is the firct, occurrence of thic type
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surveillance tenting.
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h Very truly yourj\\
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W. T. Ullrich 5