ML20086H807
| ML20086H807 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/19/1975 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086H806 | List: |
| References | |
| AO-75-39, NUDOCS 8401200248 | |
| Download: ML20086H807 (1) | |
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h uj*/dc4'dfg,4 Pili 1ADELPflIA ELEC.TRIC COMPANY Peach Botto:a Atonic Power Station Delta, Pennsylvania 17314 /
Hay 19, 1975 Mr. James P. O'Reilly, Director Office of Inspection and. Enforcement Region 1 "7.)iTWSt5tbrEIcIcar HegTII5toIf tT=iIssroh~ -
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631 Park Avenuo King of Prussia, Pennsylvania. 19406
Subject:
Abnomal Occurrence 24-lbur Notification Confiming J. Franz *f p1mne 'convers:ction..with Mr. Walt Baunack, Region. I., United
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'Referenec:
License 26=ber DPR-44 Technical Specification Referenec:
4.7.A.2.f Report No.:
50-277-75-39 Report Date:
May 19,1975
, Occurrence Date:
13ay 10, 1975 Facility:
Peach Eotton. Atoalc. Power Station R.D. 1, Delta, Pennsylvania 17314 Identification of Occurrencer Excessive leakage thru the "A" loop RICI inboard and outboard torus cooling valves (MO-2-10-34A 6 MO-2-10-39AF.
C:r.d' itic.: "r*:r :: Occurrcr.;c:
Unit 2 shutdown.
- Descriptirn of Occurrence: -
During a routine Iccal Icak test of tho {l11R'"A" Icop torus cooling i
voivas, valver !?O-2-10-34A 0 !:0 2-10-10A ucre four I to Ic;k.. Thc prelininary test pcTfor ed, which identified the Icak, was with waterr later testing with air confimed the leakage rate to be in cr.ccss of 6000 cc/ pin.
Designation of Apparent Cause of Occurrence:
Under investinction-Analysis of Occrrrencc:
Nornal operating pressurceof the PJUt ptemps during the design basis accident is greater.then 49.1 psig thereby prec vding cuticakagerinto-the RIEL r.ystus.
Even if the contninaent nteosphere Icake,i.back thrcugh 4
these valves, the 1er.Lnge t.uuld enter theiPJ'.T systen which is a closed
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systcu nn.1 :2e tested satisfactorily as part of the Type A IIRT..
Safety icplications of this occurrence are therefore niniusl:.
Corrective Action:
To be detemired Fai10ro Data:
Nono Ver f.ml
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p.ti. T. Ullrich, !bp.:rititen: lent-
- i... Peach. l'ottom. Ateni' Pexer Statlen.
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8401200248 750528 PDR ADOCK 05000277 S
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