ML20086J042
| ML20086J042 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/18/1975 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| AO-75-21, NUDOCS 8401230068 | |
| Download: ML20086J042 (1) | |
Text
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. Ac t Peach Ikstron Atomic Power Sggion g
Delta, Pennsylvania (9 17314
' f.1 rc h 13, 1975 tr. Jene s P. O'Reilly, C irector
)ffice af Inspection and Enforcement legion 1 Inited States Nuclear Regulatory Comission i31 Park Avenue
'ing of Prussia, Pennsylvania 19406 iubicct:
Abnnemi Occurrence 24-l!our Notification
- onfimin3 J.
F. Frnn:'
me conver sat ion with Mr. Walt Baunack, Region 1 United St iuclear heculatory Coc-nit.on on March 17, 1975.
5
- ference:
Licence Num.ber DPR-44
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.acility:
Peach Ecttoa Atenic Power Station R.D. 1, Delta, Fennsylvania 17314
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Ider*ification of Occurrence:
T Icpreper valving u:lich resulted in defeating :.he "6" Recire pu::p differential '
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pressure switches.
)
'onditions Prior to Occurrence:
t Unit 2 at fall power
)cscription of Cccurrence:
i It was discovered that a blocking work pemit applied to the ceron root valve for the "B" P.ecirc puap difforcatial pressare switches for the repair of a val bicek had not been cleared prior to reactor operation.
These switches supply y
J infornation to the LPCI loop seicetion logic as to which pu::pa are running.
I
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Designation of Apnarent Cruse of Occurrenec-(
I:cdivid'11 t'nilure to identify that the block was on a safety related system
'during conpletica of the startup check -off-list.
Analysis of Occurrence:
Analysis of the possible itecire. pr p re:ning conbinations and Eccire. pu;p br 1ccaticas for a LCCA condition irdienter that if the LPCI were needc4 loop selection vould have been properly nada.
The cafety implications of this occurrence are therefore considered minit.ul.
Cerrective Action:
'Ihe icproper valving was ic::cdiately corrected by clearing the bicek on the af fccts d v.21ving.
8401230068 750318 Failuro Data.
PDR ADOCK 05000277 5
PDR Nonc previcus Very truly yours,,
p
.;, y # 6 -c -
L T. Ullrich, Superintendent, Peach Cotto:s Ato aic Power Station
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