IR 05000117/2004015
| ML20136G225 | |
| Person / Time | |
|---|---|
| Site: | Limerick, 05000000, 05000117 |
| Issue date: | 07/25/1985 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Novak T Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20136E841 | List: |
| References | |
| FOIA-85-668 NUDOCS 8508020104 | |
| Download: ML20136G225 (4) | |
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i3NITED STATES ' . &
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{ NUCLEAR REGULATORY COM6flSSION }
WASHWGTON. D. C. M655 . k...... M25 EG5 ( f
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MEMORA'(CUM FOR: ,
, Thomas M. trovak, Assistant Director - l for Licensing, DL l E l .) .
FROM: ~ v
.
Dennis H. Crutchfield, Assistant Director g
,
for Safety Assesscent. DL '
- ,
- *i SUBJECT:
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; UPDATE OF LIHERICK 1* CPERATlHG EXPERIENCE ,
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- This memorandum 1. Two re updatas our previo6s reviews of.operatfugt experience 1 M.1984 to January 17, ports c'overing?the icw' power Itcense periods (Octo er 26, *
,
1}
I respectively on knuary1985 and January 29,1985'and April 17,tb1985 April 15J 1935 issuejf ~
.S* .; 25,1983) ; . the first 6 months of Limerick ..-
ligeration (enc:losures 1 and 2)provided a servey
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$ 'This review uptfate covers the period betwean Ap'ril 15. 1985 and July 15, 198 ,
3; ftled per 10 CFR S0.72 and' Licensee Event Reports (LE u , S si Operatiiig i%ectors
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4, event nents briefing sumaries were ..: dy examined to.ydentify the inore significant 'F i.: g, )-
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[;4$5ursey of Expertence .. ..h .. . .,y -
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; . e, 1985 to July 15,19ES.Eimerick 1 reported 18 noir-seci;rity events /Mriod M , i. ex
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,t eports were received.at a . tate sf. approximate 1 . 10 IFR 50.72 ? 8 licensee eve 6t reports werc e received at a rata. A reports / month whild s3 '.
t, og .iperick i ms in cold shut'down forf the' entire'. parted surireyedapproxi
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; i, is shown in Table 1; the L hwricid f rate of 50h;.,y,i ..
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tver tha r.tst 9 ironths has'bcen lica>in scrts and LER twirts '*,r l ,
rate of reports (30.72 reports onpd ERs)g a cons' hnt cacreasing tren . Th ' . ' ;**
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/3 of the rate of reports for tWfirst 3 (montnsi 'In addirio'ir the hst 3 months . 4 ues T; r i
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;han averag2 rate ..+ of reports 'for Liberick;! . ;; y" dur'in
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i( * Lase in the first two periods surveyed. einergencpaaf tylimerick As.is,the.Va
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'{ tuations repreicnt the majority of, reported 494 I'ents involving ESF ectuaticns ,shod
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actuatinr:st tyditve of gli o i, .
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introl itectorroom ventilation isolation caused by a b chan.ie .. 'n en.' spe 'in the chlor.ina.g(p ... -
:. Q illure of any particulisr.' cceponent.The .ivdat%fng o not relate 5 ESF to the actuation i
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'a pre /4 of the totol ba,ber "of event Personnel ers'were' identified for
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l This 7 sious periedr.surlrplyM, se(abq y 1/2 and 1/.f .1 ihnificfntly less tMn 1.h'd I
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! [%l;;,., 7.j ' " Events During the past 3 month period of revie none,of th , W' safetyBriefin signtficance which , justified its-incluilon on th
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. Conclusion {. ! t
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first 6 mertths of the 'oflow thepower lod power;4feense license priodperfo6*nd and compered with./ i Ysim @d w
- frequency of reportable eteentslhafdecreased'. oth
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event frequency ap ea,rs Reginnt beI,aad fcensee and has ~ become significantly . "'.~M -I'
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%r. uiew requirer d,pga{af{ =actiz c. , (httiatives to reduer the .
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TABLE 1
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RATE OF REPORTED EVENTS AT * i
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TEN SELECTED UNIT 5' ' ~ ' .
" -
DURING LOW POWER LTCENSE PERIOD
.
Period. of tcwer Power 6 Operation Studied V Rate of Reported Events Facility -
(Months-) .#i ' (Avg. No. Reports /Nonth)
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.- 50.72 ;LER*
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PWR
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C ' Calloway Onft 1
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A, Catawba Unit 1 - * 3:: Byron Unit 1
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.. "k - 5 !5 Waterford Unit 2 los ~~ 15 " -Kttr- *
Palo Verde Uni .0 . 7 !
'15 .5 -
8 ** 2 i Wolf Creek Diablo Canyon 2 . i
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11** 23 4
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Average: 7 PWRs .y - h,a - 8
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Average: 3 6WRs .
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T2) Period is frca Janitary, 17,1985 985 3 '# a
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TABLE 7 '
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BREAKDOWN OF REPORTED EVENTS .l <
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Category :
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. .'.. No, of Reported Eventst . r .-
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1/17/65 - 4/}5/85 '
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