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Updated LER 81-032/01X-1:on 810616,while Performing Surveillance Instruction 4.2.B.8,switches Ps 68-93 & 94 Were Out of Limits of Tech Specs.Caused by Setpoint Drift. Barksdale Model B2T-M12SS Pressure Switches Reset
	ML20009H579
Person / Time
Site:	Browns Ferry
Issue date:	07/27/1981
From:	Holder G; TENNESSEE VALLEY AUTHORITY
To:	; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009H570	List: ML20009H569; ML20009H579;
References
	LER-81-032-01X, LER-81-32-1X, NUDOCS 8108100266
	Download: ML20009H579 (6)
	v • d • e

_ _ - _ _. . .

i a S. WCLEAR REGRATORY COWlSSIM

' y "".". "' . UPDATE REPORT - PREVIOUS REPORT DATE 6/26/81

,, LICENSEE EVENT REPORT

, CON T ROL BLOCK: [ l 1

l l l l 6

lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) l l@~

i hl ! Al hl BlLICENSkt R l FlLopt1lhl 010l -l O ! 0 l 0LICENSE 14 15 l O NUMBER l 0 l -l O l 0 l@l 26 4 26 l 1 lLICENSE 1 l 1TYPE l 1JOl@l57 CAT 6J ji,H 't

' corr IFl t'l lll,f,[,h' l Lhl 0] Sl 0l 0 l 0l 21 5 l 9 l@l690 l 6 l I l 6l 8 l l l@l 14 075 l 7 REPORT l 2 l 7D ATE l 8 l 180l@

i H 60 til OOCKET NUMBER 68 EVENT DATE EVFNT DESCnlPTION AND PROR ABLE CONSEQUENCES h QT] l While performing ST 4.2.B.8, switchen PS 68-93 and 94 were out of limits of T.S. ,

g] ] tables 3.2.A. and 3.2.B. Switch #1 with containment isolation signal and both shut- g

~

l I n l 4] liun cooling suction valves open will close LPCI admission valves and switch #2 j

l 1o I d l Isolates shutdown cooling suction valves. There was no danger to the health or jo14] I safety of the public. Similar events: BFRO-50-259/78016, 79008, 80058, 81029; l o i i 260/78002, 79017, 79024, 80022, 80057, 81023, 81028; 296/79007, 79012, 79028, 80022, l l

[5TTl L 80030, 80045, 80052, 81007, 80 i /- St 4 COMP. VALVE SYSTEM CAUSE CAUSE 1 COOE CODE SUBCODE COMPONENT CODE SUSCODE SUSCODE M7] I Cl Bl@ LEj@ l Elh l 1l N l S l T l R ] U l@ ]@ { @

12 13 18 19 20

/ H 's 10 17 OCCURRENCE REPORT REVISION SE QUENTI A L FWNIYEAH HEPORT NO. CODE TYPE NO.

@ ;t t;';y, H'HO

_ 21 IaI11 22 1-1 23 1013121 24 26 Ld 27 lo11I N M lx_1 30 L--J 31 11 1 32 ON L NT METH HOURS SB IT D FOR 8. SUP LI R MANUFACTURER a Kit A fl N i

Ld@LtJ@ LrJ@ L7J@ l oI of oI oI 3J L11@

4L LN_j@ ]Ll@

43 lBl0l6l9lg-44 47 13 e4 h- 3ti 40 42 CAtJ5E DESCRIPTION AND CORRECTIVE ACTIONS h 1iloll htnnint drift. Seteoints on the Barksdale model B2T-M12SS pressure switches were l

, It l'] I row t tn the nroner value and the surveillance instruction completed satisfactorily. I I

l LLL1J l Additionally. a desien chance reauest (DCR 1398) has been initiated to replace l

l

{ lilil I these nuitches with an analon transmitter with a trip switch. A study of setpoint'

! l 1 '

l J r I f t- nroblems is attached. 80 r .i a YEk1ifE s Pom o OTHEH S T A TUS I CO R DISCOVERY DESCRIPTION lt l- l kj@ l 0l 010l(9)] NA l l B j@l Surveillance test l At t #vii v m$s t o r

,,, u m.to e nLu m LOCATION OF RELE ASE A.N^Ounr onc1,v,rY @ lI NA l IiI"1MLtl 1 1

@ LzJC91 to 11 44 45 .80 Pt fie.dN*2f L [ w P< $t H4t S N UMill I4 l)F ZDIPT IO*4 s l

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,q,, , g i E ;l H P i t* P4 Q WQt)l NA l lllllllllllll2 a 9 in 68 69 SO 3 8108100266 810727 tit n _ Cene Holder pgoys; (205) 7?9-6134 !*

PDR ADOCK 05000259 S PDR

s

T. . n c . . . . V alle y ro u t o ne Forni ILF l'I P. r. .ve n:. Fe r r , N oc'> at P: uit DF 15.2 G/04/81

- 1.F. t : SI'PPl.F. MENT Al. IN FORM ATini; 259. / 81032 R1 T' chnical Specim ati..n inw!ved Tabic. L 2.A and 3.2.B.

In Ho LO

!h n"r h il lineb:r T< chnic. ' .sp"cificcition 6.7.2. A(5) *Date due NRC: ._ _R A. _

llah: 11 Occurrence 6/9/81,_ 'l ime of Occorrence 1000 Unit _ ,_i _ _ _ ,

i<h ntifiention an.! lx scription of ()ccurrence During SI 4.2.B.8 reactor pressure switches PS 68-93 and 94 were found out of T.S. table 3.2.A and 3.2.B limits (100 I.

15 psi). The greatest out of tolerance was 9.8 percent. This event was not determined reportable until 1300, 6/15/81. PS 68-93 as found switch #1: 132 psi - switch

2: 126 psi, PS 68-94 as found switch #1: 131 psi - switch #2: 135 psi. Test limit is 123 psi, which is the T.S. limit of 115 psi plus 8 psi water leg.

C.,nditions Prior to OcJurrence:

Unit I refueling outage.

Unit 2 In unit station service transformer outage.

Unit 3 at 99%.

A. t i n p.s ifim t i i tiu re.bnic:i! Specific:dio: 3urveillance Requirements niet

.i- t inope. ai,1c . .;up;.vu! . I M. set it e _, _ _ _ _ _ _ _ _ ,

None Appan nt Cause of (L s trrence Setpoint drift. This drift, historically, seems to occur during times of the year when there are ambient weather changes.

A t. d,, : is. 6f Oct;nrrence There was no danger to the health or safety of the public, no release of activity, no damage to the plant or equipment, and no resulting significant chain of events.

Cort c etive Acti in : Setpoints were reset to the proper value, and the surveillance instruction completed satisfactorily. Additionally, a design change request (DCR 1398) has been initiated to replace these switches with an analog transmitter with a trip switch. A study of setpoint drift problems is attached.

Failort Data: BFRO-50-259/78016, 79008, 80058, 81029; 260/7o302, 79017, 79024, (

800n 79028 80030 80052 8.1007 80057, f;T i en t wn . 81023,t -81028.;

1.n e296/790G7, ume ; Responsibility 79012 - dr,P9022,t cumen Cont,rol Sup,ervisor ,80045.

Pe: p tllev ision :

s

e ATTACH)ifl1T TO BPRO-50-259/81032 R1 Subj..t: SETPOthT DRIFT - liARKSDAL.E PRESSi1RE SWITCilFS Recent ly t here has been a number of I.EKs on Barksdale pressure switches; six during 1981, '.1 ulnee .lanuary 1978. Our commitment to training on t bene sw i t che: has been strong and continuous; t.heref ore, we do not believe this is the problem.

Our at t ent ion was turned to the nwitch and the application to which it was beina ur.ed. Attachment 1 plots the cetpoint drift of 4 of these swit ches Ior a period of 4 years. It is readily obvious these switches are cyclic, being high in the warm months and low in the cold months.

Attachments 2 and 1 provide the specifications for the Barksdale P2T-A IT;5 switch. 'lhe important characterist ics f or PS-1-81, 91 are:

Element type: Bourdon Tube Proof Pressure: 1800 psig Rated Accuracy: 1% or 12 psig 3et point: 154 psig - recently changed from 160 psig Ad just able Range- 77-1200 psig it woul.1 appear baned on At tachment s 2 and :l, the svitch would perform vet" reliably, llowever , ll'e re.e.on it does not hecoren apparent when At t ac hment 4 is reviewed. The following conclusions can be drawn f rom At t .ichmen t 4:

1. For eer app licat loa , a pistan switch is bet t er than a diaphragm or bourdon tube. Our experience i nd icates t he pist en type Static-O-Ring to be a very reliable and accurate switch.

2 liout th,n tche nuit.ches are extremely sensitive to process surges. In our application, snuhbers have been in-etalled to help alleviat e thic. defic iency.

1. For gre at est accuracy, the setpoint should fall in the upper 652 of the adjustable range. For the most ,

f avorable life f actor the setpoint should be in the lower 65:1 of the adjustabic range. For PS-1-81, 91:

Span = 1123 and Setpoint (% Span) = 13.7%.

This places these switches in the lower portion of Zone C, which is FAIR accuracy and EXCELLENT life.

Our experience proves this correct. Other switches we have drif t problems with are PS-68-93, 94. They have setpoint s of 108 psig or set .2nt (% span) is 9.6%.

In the final analysis, one can only conclude a misapplication of these switches, both in switch type and % of adjtuit able range. We recognized thb years ago and DCR 1398 (12/7/77) was initiated. EN DES does not have an implementation date for DCR 1398 as it now is tied to 79-01B and environmental qualifications. In the interim we are investigating an i:rproved switch and will keep you informed.

e LER BFRO-50-259/81032 R1

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,, , be UELAVAL TIMINE INC DAMSDALE CONil'0LS Divisl0N .$125 Akoi Avenue . Los Angeles

Caisf. 00058

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n. . w i tenvr4.,. Tut,. u.4 4 J W &r G A'et House'id (NIMA 4) OPERAllNGCilARACTERISTICS

ORDERING DATA e n te mmai r.t'

PRES $URE SWITCHES - Mi vali:es ginn in P $1. (Cauge) l e va ee piv at f a'e<:8.J /d, intine it f prong A1gstab?e Rsnge Appros' Blf B2T u->

l ft. A pgb.y %. 3 Prenure lEEDm] '"re** we,,ed i Nca'~

Min Man. (Differentiall,Matenal*r und.n c'~

Nurnbu M.nlMu.

! '(* ,k .' 1600I50[Ilid~70 1200 10 2[il2nN BIT H12 - 02i H12 j, .-id . 18c0- L0 1173 77 1200 111 21 316 BIT Al?SS B2T A1255 I,' Q

M/['g

p. /Ga 7

fd 3

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[} 4M0 160 4S00 3170 ISO 3200 Ito 3161 199 3200 16 to 39 I5 to 30 0 onre 316 BI T.H12 Oli H1253 B2T H32 B2T H32S$

l/ .IN.7N3. 2I ,k j,'*

7100 74 0 4715 325 4800 40to 85 316 Bli A4RSS B2T A4SSS

- 9750 325 6335 440 6500 54 to 115 316 DiT Ar.,535 82TA65SS h.NN . SA* 4

" 18000 C00 11450 1150 12000 275 t: 550 31 6 Dif Al20SS B2T Al20SS Y hk .

4

" 24000 60') i 17450 1150;13000 275 to 550 31G Dli Allt0$5]D2T A130SS

"Brorre" rep #ese'ils Phosphor Dennze fute with SAE 88 Brass Sodel -

t:lf 51901T StillNG F2r DifAt CUN1ROL "316" represents 316 Stainless $reet f 6ta & Sechet

""AMINC0" remie opening for %* 00 tube conne; tion. To change A65SS and A120SS smilches to %" ript, add P4 sutlia to enodel number. Price addition required.

Approxima?t shipping weight 2 S lbs.

DLMIL DATA EllC19lC/L CHMIACillilsTICS, Als rnole:s incorporate Underwriters

Laborator'es. Inc.

! Jett sn.y.!c po'e datJe f%og snap adion switchias c'etents. Electrical ratmg (con-t v s in t ctwel IG amps 125 or 250 vo':s AC,3 amps 480 volts AO. Automatically reset t r ..op a t.no of sa tth For nmee details ar.d other smith clanes. see pages 33-35.

IIICTRICat CO?.NICt;CT To sen.v terminals on coveeni terrainal strip through %*nps ts . 6 t tennerta-WIRC CODING - PRESSURE -

IR6'JURL CONNICTION: %" N P.I. i.ernal thread. except as noted", reodels with - Circuit sl: Cominon- Purple Irof i vesores ata.e H *MO P S I have ArAINC0" fehe cg cning for %" O D. tube Normally Cicsed - Blue s ent.c tvm Normally 0 pen- Red /

A D'!Nf DFN T l%5 flit lCT'CNS Circuit #2: Cominon- Brown Nosmatly Closed - Orange

(

f..*r ; 'mtent vr. . clockane to toner actuar:en po:nt (nahn se;trng). Normaily Operi- Ye!!ow e

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, /} rrMcHof ENT 4 LER BFRO-50-259/81032 R1 HOW TO SELECT A PttEGUE CWITCH tW. YOUF APPUCA fiOM O

Terminas ban.h pussure switr b.s ara hovrat an '. el arW STf P 1 St MCE Lif f. 071HL W/tTCH I ' '"- ' "' # 4 ! Md '.otn enc lat- a.1 t r'rn .in,,I lect s. t5os t e. . 'ed sesw e Ide s t r e 'ir st c r.v.etre at' 1- in be made wnontien no ea rt*.,se rj tv,yinre a nf* m V A / tst.rnal i . "i t mr .s 6 o w a r swit: 's, s eg 3r fev r .' t'-e cressure lu . h 1 i bi o s t . er s tivit y >9 .,r cJ if tha c.c r' i . e ble(N INmt.cr of e itti t e wj E n nio s on p.*cof p owJre sw ttites are de%p,ns.

s y. i..s t he sw.t. b r. . o pt ..*61 to 0; er eh*) vs noe r%! Don or 'h tjsenc,s

wt (D ( Or f 9e rit ta orc %ted t' er;tricol ttandards

! r". . u v uf e.D. -r a 1,ourdon t.1.e c.r Sapt'ra g"i smt .h is ni #so'a t,r , the ear ts ferim cyp'ouve atmosph sc. /di cu-i n. t n .d ed if . ser'. it e hf e of enose t h.an one melhon c,de s es des. red a piston setch houht 1;e used. An escaption, plouon pire.f er.ryde's ar'; camp;1ed with ternwal bloclas 13r Cor.'4e'Hend, in wormg to pos ro*e iro, t e n wle when rirr'uore chrip' in J Sys I. .n e. .erv sh, rit (M,, or len. o f it e adlu'. table ranfe).

Under wh tr o :.tions a bc ui don tune or dinbrann STEP S SELECTION Or ADJUST AGli RM4CC g, ,

...tc h s .u. ta i < 1 op to 2.'s er o'icn cydt s heft te met il 3g . .g .. g,

'*' switeti mas see under norrnM wn Arng conditmos. I!is is

. . ent o ow'erotion in c h". sus a prewure switth 's .-erma ly the a.fsustable targe.

th. : ieit et ( r. Hg. r.% td'c ts of the w rw- hte If a for graatest accuracy the *.et poir't sMu!d f ail m the upper i n is e pci.tr i to tv ir enore ti.in on(e escr/ threr r d t% '

For the most f avorable life

. urts. a ,i st m ty pe switc h 't vald he sonihed The factor the .et point shou d he in the lower (4*4 Of the o e tal of .ifiy Loor toes ti.t.se or Co.q Id.ip f i asis as A *pfHbl a tju , table range Ibetrefore. the mo7t favoratsle ccmfar:3-

,'.h val: # i it and 8 st y;ue in i s t r e o e'y fast cWhng t'on of nLcuracy and life f ar. tor hes un the m dcle 30'M, of g

e . e. uns, tr'us shu.tes um tbn hf c of the swett b ,

I! c me ha to (< d onh ol'e d enu t .i!*.rvs i a cr usadored gp,8 % %t*i to da.i;;hr v.nl Jud bourdon tut e pressure ao m selet t.eg a p t-%u'e wt .h and. to '.cnp'S selection- wtd.as

.vo, t ri t viaters A fer e .ch type of sw tch are noted on g a u am i.. , L n 4 % ttC1 Kst a , , ,

4; i ; b e cate:g butes .m

. . . . - 1 n m.t t . ..... c ' tit s u P .' PHOOF PrtES50RES t n . e of the t , of p:e %re w?ch to "c usto - d+

L _ , ,, , ,,,, _,__I 'l 4 f/

ano mu,t m e <erned ; t ,,- ,,; if p g ,, . t .na, n tuSe er os to i 8i j c' t' r g ,r t,nf g t sue o t o wi. th .t will to L bn - D. t . (Penof l i.

.o wo e is " h ." .:st ,or c e cr~ sue . It' ;t ev c ,er b. -i a .; l 7 i,' . 4 > '

n ' e T t."ed t'at, jJ

( . coe n..e d . .i w teto , !! .rm t 0, n't ough a g :- si.re g u.: e in w e pw r a tontt W o;.ar ,' ,-

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n t t

6

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t am th it ite v.utc e c 4attty t*- ( reau ~3 ., '

in.iM a *r.n .v. i.ourdon tube .4 .ono .<.'t he< .re er lr f' -

g ,, j I

.a m ut t t.o ara. ; r , p. ..e so... :l f' Ii

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.uttf.es h ue an e nst.. hie t.n ge S 12.000 f.se ! , , , ' f'

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a. c .

(' 7'.'_,_ __.

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v. ii h i pone p.e. m r or 5.:ra oi. t ea . /. s e rau ! .ttr t wo i e n r u o.1

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', f 1 P 3 f U*actIO'i Or THE SW11CH He fonito n at t ' e v.m b is a nt t hr t dete*rroney f ictar in 9 J h.ng a srie< ! Jn ihree type . of Oak pa e prappre

.rh... b ue.' on t u m tion. r e ihy r +c.t Le't;w: HOW 10 9EAD CATALM NIH.tBERS OF (l) 5.cgte setting pecuure swita hos st*q? e 1 ung'e pres i f ripen or cluse a sn'tde e'es tucal circtot DIAPHN ACM som scor ea Lv rueans t.f ci.e inan a t c.n ch .-trical Wtc h BOURDON TUDE M4D (M Prenure dif ference switthm senv a < h.w,g en rela-to m tup betw. en tas vanatAa . ont uni d pr worn and D] A.'7 At P:STON e p n ur flow a sny lo e let tru al i art tot hy m 'ani Of One PPf_S$URE SWilf.HC#3 me n .a tion c'e < t e n il 4.t< h (3) Oual 4.unt rol pressuie swit< hes senv t een per .sure he ot s t,o o i w %;1e p: + min e te,rrr.e and epen os c h.sn t v- _ n,,,,,g,,,,,

,g ,,...,,3g i,,,.,,g,p. p ,,,,,,,ggp.pq e g

... .- ident e ter t a it al e s. - i.its 4 , rue.ing e t t <.i: en op actan

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ro c t r n at e.v.

ti es l ' ,s. .r ..a e r * . . . . e si . w ..n . . , . r .,, a m..,................,a.

sif P 4 n PES OF HO'JSING A /A' LADLE ,

... ., . o . . , ,

L ' Y S '*r f *"

%! upped prenuie switd.es . m t .uc Gir adale penure !

..o ti u nt v..tbot.t hotmnrs. I N y en iy 1.e W.cd anrr eves **'***',,

v ., e , e .<- .

's t r at il t' tB la ' r e'. o f f* 3.rr. ady ai! d le . lod J rP t A e Of r d l g, ,q

. ury.n i; a go.p"mi t man'd artarers for '. m e ovumnn _ , g , y , 4 , , q , , ,.

.ntt. IJ ttor1 'y, He ;vd e.wi ches en i / t s* p.D(hJted

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on * ..i'. ' e'<*

mi po .vb e *+r.e t t m r I, m o.m oi e . .sc.f so i e .q*- e, *f-fa ens

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ML20009H579

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