IR 05000117/2004015

Updates Operating Experience for Plant for 850415-0715. Review Updates Encl 850129 & 0426 Reviews for 841026-850117 & 850117-0415,respectively

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: IR 05000117/2004015 ML20136E837 ML20136E964 ML20136F664 ML20136F774 ML20136F970 ML20136F977 ML20136G052 ML20137A749 ML20137A929 ML20137A955 ML20137B013 ML20137B042 ML20137B092 ML20137B105 ML20137B123
References
FOIA-85-668 NUDOCS 8508020104
Download: ML20136G225 (4)

Text

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[m.,,%, . r i ' e ! ". ei(*j NUCLEAR REGULATORY COM6flSSION } ~ i3NITED STATES ' . & . % { c WASHWGTON. D. C. M655 k...... . ( M25 EG5 f , -> -

MEMORA'(CUM FOR: Thomas M. trovak, Assistant Director - l E l , l , for Licensing, DL FROM: .) . Dennis H. Crutchfield, Assistant Director ~ v . for Safety Assesscent. DL ,g ' - *i SUBJECT: - , . IF UPDATE OF LIHERICK 1 CPERATlHG EXPERIENCE .j ,

' ,$ Introduction'

f.

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\\ - This memorandum updatas our previo6s reviews of.operatfug experience f ' 3.

s  ; timerick 1.

i.

Two re t

M.1984 to January 17, ports c'overing?the icw' power Itcense periods (Octo er 26, 1} 4 respectively on knuary1985 and January 17, 1985 ,

tb April 15J 1935 issuejf S 29,1985'and April ~ I . * 25,1983) the first 6 months of Limerick ligeration (enc:losures 1 and 2)provided a servey

.; . - [. .. - 'This review uptfate covers the period betwe - . .< - e . $ an Ap'ril 15. 1985 and July 15, 1985.

S ,

ftled per 10 CFR S0.72 and' Licensee Event Reports (LE r

u , si nents briefing sumaries were dy examined to.ydentify the inore significant ' Operatiiig i%ectors 'F I.

4, events.

..h i.: g, )- [;4$5ursey of Expertence ' ..:

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, .j ' During the three month's low power.dcense surve...<. ' .. . , 1985 to July 15,19ES.Eimerick 1 reported 18 noir-seci;rity events /Mriod ex M, i.

w , ,

e, . ' j, eports were received.at a. tate sf. approximate 1 . 10 IFR 50.72 e.

? . licensee eve 6t reports werc received at a rata.

b.

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A reports / month whild ,t t, og.iperick i ms in cold shut'down forf the' entire'. parted surireyedapprox-h.

'. s3 e - , .. f'P:n i, ...., . , - is shown in Table 1; the L hwricid f rate of 50h;.,y,i.. .. - tver tha r.tst 9 ironths has'bcen lica>in scrts and LER twirts '. ' ;** '*,r d.

rate of reports (30.72 reports onpd ERs)g a cons' hnt cacreasing trend.

.. l . The.

, ~ /3 of the rate of reports for tWfirst 3 (montnsi 'In addirio'ir the hst 3 months ues r i -

han averag2 rate of reports 'for Liberick;! dur'in

. n, tre conachea T; . , i .

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er . ;; y" M .d . . ,!,'hebreandownofeventsreportedatb;. ..+ s r;.a l.g;.,, ' i',.a..w- .,,i.....:. 9F h

a ' ' . . - - i( Lase in the first two periods surveyed. einergencpaaf tylimerick T fshshcwn in As.is,the. W. t W... ' . . I'ents involving ESF ectuaticns shod that 3 of , [stit Va n n! /

tuations repreicnt the majority of, reported 494 catures-(ESF) ' ty.,t. L '{ , The revud gli o ! p$ . '4 ' 2/3,' "., . introl room ventilation isolation caused by a b en.' spe 'in the chlor.ina.g(p Q 28 E i, actuatinr:st tyditve itector chan.iel.

'n illure of any particulisr.' cceponent.The.ivdat%fng 5 ESF actuation .. - ...

.

iouts1 Personnel o not relate to the i ,% 'a pre /4 of the totol ba,ber "of events.

ers'were' identified for -. w d,*Si.%- .* h

l This

sious periedr.surlrplyM, se(abq y 1/2 and 1/. ihnificfntly less tMn 1.h'd S F,* :l1 Q

f.1 W1;. .. - tie even..ts, respec;,! vel,y)g .:.u ,v 4.t . p .,. s, c... m i ,- , . . ;, i.

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j-44 ., tr-2-a . h '. ' .' .) ' ' [%l;;,., During the past 3 month period of review. none,of th . .

. W' s safety signtficance which, justified its-incluilon on th 7.j ' " ! e events reported . , Events Briefing.

,. W 5 of a e Operating 3;eactors . Conclusion {. ' - ! rM*f *f.

Operating experience at timeripk 1 h h[ t $' ^12 . as been stirveyed for the past thhee ,h ^-d. months of the ' low power license priod and compered w i . first 6 mertths of the lod power;4feense perfo6*nd with sim i i . Y @d - frequency of reportable eteentslhafdecreased'. oth - ./ perience at.

i e ' in the first few months of the W ' . ew indicates that the

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_ W "i% R " ' iderably fvtw that dbserved ' lower than average r.liceit , 'i and has ~ become significantly. "'. event frequency app. Reginn I,aadt.

1fcensee-I' ~M (httiatives to reduer the f. uiew requirer d,pga { = c., {af actiz ea,rs t be .; g.'p' %r ' ' .. . e. c. .nhos.es mete. r-

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. TABLE 1 - . RATE OF REPORTED EVENTS AT

i TEN SELECTED UNIT 5' '

~ ' . DURING LOW POWER LTCENSE PERIOD " - .

Period. of tcwer Power

Operation Studied V Rate of Reported Events r.

Facility (Months-) .#i (Avg. No. Reports /Nonth) - . ' .- 50.72

LER*

! .. PWR .:- . . - - ' C ' Calloway Onft 1 3.0 ,'

40 - . 3::

. : a' = ,: , A, Catawba Unit 1 - 5.0

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!5-Kttr- ' ' * Byron Unit 1 los ~~ " 15 " '15 f.

Waterford Unit 2 3.0 Palo Verde Unit.1 4.5 .

! 2 i - Wolf Creek 8 **

2.5 - i 11**

4 Diablo Canyon 2 .2.0 - <* 6 -

i0 - - Average: 7 PWRs .y - ,- h,a -

i 7 .t .

,. gwg v- - 1,'.,, ~ s l'

- - . i . ;y.. Suscuehsnna Unit 2 - 3.0- , ' . 'p' t '2

Fenni 2 '3.0 -' !- .g

LS . n,l Linerick 2 . 2.8' (1 )-'

1. #~.

.. ' - [- .. . , ' Limerick'1 . 3.0(2) .'.l.

9 . 18

d - Limerick 1 3.0(3).

') ' r ' ' -y

'a....,$. Limerick 1 Average: 8. 8... . -- f,*.;

13 * , , , .. a. s . ,o.,..{k, 3 ' 'i . .. ' , ., -.... a - !., r ;." ,i - ' . .. Average: 3 6WRs ','d ? E . . lE 1 - '$ h~

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. .- ... - ' (O Period is from October.' 26,1984 'to.1anuary 1T. 3985 ....m.,- . - - -v . ' -' e . . ' -

T2) Period is frca Janitary, -

'# (3) Period it frc;6ApFi[15(,1985 ito July it,11to April 15M;85 17,1985 a - 985 , 's ', 'l ' ! ' , ., ' j , - ,y<. . ',v - -. .:, 1 i , e j } . - - g.,, , ., t. 4.- . - ..: , - . ... y. - , . ... ( - . ~ ~

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TABLE 7 ' , - ' . BREAKDOWN OF REPORTED EVENTS .l ... - <

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1'" .- t J,' At LIMERTCK UNIT 1 - C'E , . . i.

General . , . -_.1 , . .s.

- .w ..'.. No, of Reported Eventst Category

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