ML17360A142

Responds to Generic Ltr 88-14, Instrument Air Supply Sys Problems Affecting Safety-Related Equipment. During Normal Operation,Pressure in Air Receiver Maintained Between 112-120 Psig.Testing for Hydrocarbons Will Be Performed

ML17360A142
Person / Time
Site:	Waterford
Issue date:	02/21/1989
From:	Burski R LOUISIANA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-88-14, W3P89-0028, W3P89-28, NUDOCS 8903030212
Download: ML17360A142 (32)

Text

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~ 13-ifS-A20 APPENDIX C

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/ 317 SRRONN NE'SV "3 R - =~ P 0., BOX 6"3PO ORLEANS, LOUISIANA 70l60 ~ ( 0') 95.31CO Feb:ua:y 21 LaSa 43P89-0028 A4.05.

QA L'.S.. yuclez". Regulzcory Co.=-.'ssion ATTN: Docu;enc Conc".ol Desk

~ash'ngton, "..C. 20555 Subjecc: Pacer'."Ord 3 SES Docker No. 50-382 L'cense .'to. NP:-38 Gene=ic .Leccer SS"-14 Gencle=.en:

The yHC 'ssued Ge ne". ic Lec-e" 88-1 4 3 T ~

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r h r Supo s

~ R ' Sv5 ePR p oo1 e~s

~ Pp Pt OP' Re" zced:-"u',".en: o'n Au zus: S, lo 88 c~e

'c: ecc 3 4'2 s -o -.ecues: cha- l'ce..s ees ."eviev arose o

( anc a ~ 'h' a des gp. anc opec2c'np s ve: = 'ac'on 0:.

ve Czz Oa ~ 4'zs ces-:hac ac:

Co RwP lS a

~ PRO ins.c"u=enc ' cons'ac.lc Css Cne i~pap ~ u aC S eCO ~lenC2C OP.S N OC Pd v cu2 co 'pone .Cs se=ved.

e".i =ca='on chat nzincenance p".ac"'ces, e~e".gency procecu".es, and t"aining a"e aceoua"e co ensu"e chac sa=ecy-".ela:ed ecuip=ewe v ll

.unccion as 'ncenced on 'oss o= insc".u=enc a'".

P ~ ecR 'ca= 'on .hzc che des'gn o che en" '."e insc".u en'i." svsceq nc uding a '." o". oche" pneuaacic accu=ulztors 's 'n acco".dance l;ich

'cs incended .unc:'on, inc'ud "..g ve".ificzcion by case chac ai=-ope".ate 'z=ety-relaced co-ponencs vi pe::o".= as expecced 'r accordance ~i:h a design-'oas's evencs, including 2 loss oi che no a 'ns " =enc a'" svs-e=.;h's

~ r X cesign ve"'='ca-ion shou'd

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zn 2. alys s 0 cu .enc 2'pe 2 ed co"poner.c :zilu: ,pcs':icns eou ed sa ecv u,c ons.

ve chey a e co ec S.oc assu g To pe o che a bove, 2 "ulci-discipline cask :c."ce '-zs o".=ed :o "eviev, eva' a-e aro ".es po"c co che gene"'c le =e". '.".'s task =orce cons- sceo o:

-.epre sencz='ves G. Ope ac oa s, P Ore"2 o..s Suppo and Assess=enc ('.:OSA ) Nuclea" Opera:'cns anc C ons:"uc ='n (NOETIC) ano L'cens'ng.

I 3 cll oo(

AN EQUAL OP>ORTUNt 7 EMPLQyER>> 3

~3-i1S-A20 APPENDIX C Page  ?

t'3PG9-0028 February 21, 1989 The attached response has been divided into rhree (3) sections corresponding respect.'ve'y to the above.

has been included as a preface to the response.

esc"';stem Shoulc you recuire add 'ona'nfo .ation please

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p f ee .ree to contact me or L.4'. Laughl'n, S'te Licensing Support Supe viso., at (504) 4/4>>'i4o<

i. 's response s submitted zs recuired under a'"d avi- v under prov's.'ons c:

Section 182a of the Atom c Energy Act of 1954, as amendec Very tru'y vours, R. 7 Bu-.

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Hanage". sk'afety Nuclear 6 Regulatory Ac=

R.=3: O~C: ss:

c ~ar n) YRC Beg on IV D.L. 'Vigginton, NRC-YPZ P~C Res'dent nspecto"s 0 =ice L ~ 'lavic

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Stevenson

13-MS-A20 APPENDIX C UNITED STATES OF AMERICA NUCLEAR R GULATORY COMMISSION In: ie matter of Loui s i ana Power E L ioht Company Docket No. 50-382 Vater ord 3 Steam Electric Station AFFIDAVIT R. F. Burski,being duly sworn, hereby deposes and says that he is Nuclear Safety and Reoulatory Af airs Manager of Louisiana Power 5 Lioht Company; that he is duly authorized to sion arid file with the Nuclear Regulatory Commission the attached response to NRC Generic Letter 88-14; that he is ami liar with the co'ntent thereof; and that the matters set forth therein are true and corre to the best cf his knowledoe, i n fo ri".ia t i e n a n d b e l. i e f .

~ ~ r ~ J R... Qursiii Nuclear SafetY 5 RegulatorY Ai fairs-Manage.

STAT. OF LOUIS lAHA)

I

)ss PAR.'SH OF ORLEANS )

Subsc.ibed and sworn to before me, and S"ate ibove named ioBQ h s ~'!.c'ay a Notary Public o

inpnd =or the Parish kllAQ f ~

r No arv Pubol ic My Cor,'l ss 'on expl res

13-MS-A20 APPENDlX C 4'Ag"=".-.OP& 3

".:-PO!lS" 70 G:.!i:.~"'C i".:".."; SS-14

~'3PB & -002S

13-MS-A20 APPENDIX C SYST Mi DESC.".IP; ION e 'instrument air system at Waterford 3 0'rov

's des'"ned to ' reliabl supp lv v of clean, c1 dry, oil-free air for pneumatic instruments con" rois and contro

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and pneu.-,.a 'cally operated valves during no "mal p'lant L I p oper ol era won. ine h

inst.rument air system, serves no safetv !unc 'on. Air operated valves tha are requ'red for safe shutdovn and'accident m t'gat on are rovided '

safety re la t ed accumulators.

The instrument ai. sys em consists of:

two orizon a1, o'l-free,'ing'e stage, ro" ary air comoressors t1:o air drver assemblies 1-ith pre- ano a" er- ftors one ver ica air rcce:ve ace ins t lumcnt a'omD css or Dackage cors sts o=. an 'n1et comoressor, mo stur seoarator hea ex""z-e " and c'sc'"a "g f' ice 1

on . e e p c..ag s

'- d.:scharged .'r;to he instrume"t ai" rece.ver bv coa.mon header. The air then Dasses through the ai" 'ter/drver a s s e...b 1 es norma 'Dc t'ns a p- cssu c voce'o + 'S be '~e en A ~

p rec ver ~ ~

be o ';C:- Dsig, the second i"stru" "- a = co=.presso. starts au orna t'a ' 1 1~ ~ oe ~ ~ <<o

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13-MS-A20 APPEHDIX C drop below 100 ps' c.oss connec- valve between the ins rument -um an s-ation air s ys~ems opens al owing stat 1 ~

on air to he'" ma'n- -n ain instrumc air sys em pressur.. The se vice air is introduced ups ream of the instrument air receiver and the air f'1-er/drver assemb?mes release note that at waterford 3 .he station and instrument air compress a re ident.ical uni t.s. The on?y diffe ence in systems is that the station air svstem does no have air filter/dryer assem'olies..

The ins rument air filter/dry

./ e" assemb4);'es a'e provided with an .automatic biomass which opens wnen drver ou let oressu"e 11 s b elow 1 o.> psig. A s- aine: is installed in ;n the . 1 er/drye. biomass 1'ne to coarse filter th ax Anrunc ia ion is prov.'ced in the ct:" rw} room for the follow.'ng'ondit?ons xr.s- rument, Rec 'ver Pressure Ei/::o Irstrument Compressor A(3) Trip/Trou'ole Irst"ument 4 v Compressor A(B) Separa-o Level ri/Lo

.nstrument D~va+ (( <<), v oub o Ins- rume" t Erver Bi~assed I .st ument Ai . ressure Backup Valve Ooen

'ns=r ment Compre sor A("=) oc':: c 0 =

Va ve Opera<or N. Backuo Actuated/Troub?e

13-MS-A20 APPENDIX C E en though .they are not saie~y-re1ated, the instr~ant air coL'pressors supplied pover frora sa.'et@ buses. If a loss of of site pover occurs t

'nstrw.. nt air conpressors trio. They can be nanually reconnected to th emergency diesel gene a-o s at. the con -ol roon's d'screticn

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13-HS APO APPEHDTX C SECT<OÃ I A list vas p-e p a-ed - o~. aiil safe y re aced s

'L 1 ai" ope."aced components.

list consisted of }73 valveses and dampers. Purchase specifications for majori y of the above ~ere reviewed for air qual'ty a '.ty requirements. They specified on'y c'ean, drv ai>> 'h The major manu acturers vere also conta~

to determine if there ~as any '~'"

speci..'c air oual'ty i reouremen s for the equipme.. Thev con" c n. rmed ti.at he only .eouirement +as for clean t r a L4 ~

The purchase s pec'iica.ions for the ins"susen aiir supo u j'ystem i.e.

comp."essors, drvers, e'c., ~ere then reviewed for ouali-y reouiremen-s o:

he d'scharged air. Tho on'v reouiremen-s ver to provide cLean, dry ai:

The pre-operational startuo flush orocedures (5:'2".-00}  ;".=ough'005) co>>

ihe ins r~~ent ai sys- m ~ere reviewed..The acceotanc Io partic a" e anc organics ~e e as follows:

~ ho pa t cula e 0'" ll be l? rge than 1/32 'inch bv }/} 6 'ch vhen  ? i>> 'I C amoled th ough a r es.ail>> ro a '"u<<ee Th s}s.em piping shall be free of o>>ganics as ve"'-"'ed b 1'c,

>gn e sa Dle =<<e r o

.hes: criteria ve e doc zen ed zs met.

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~ ~ 13-MS-A20'PPENDIX C

T e pre-operat'onal startup test procedure (SPO-23-001) >-'as a 1so revieve(

The acceptance c"':

c. ~e 'a for f the instrument a'r d~'e <as an outl et de~o:

temperature o. -40 degrees .= or .lo>-er. Th's cr'e ion ~as doc"scented as met.

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prior to the issuance of Gene ic Lecto: 88-]4, waterford 3 did not have a instrument air sampling p! og .am. In response to th's letter a sampling program 'has been initiated.

.c as reviewed applicable instrument air system dra>: ngs and ident'fie enti ie those headers which feed the majoritv of the sa=etv-re>ated a'r ope"ated 7 o... t..'s, .' n (.5) loca"ions vere then ident'=ied at >:hich >

dra~ samples. Samo'es v'll be taken ~rom 've (5) sample'po nts at leas-once each re.'uel'ng c,c>e on a .ro a n" basis. In this >:ay all '.5 points

>:i>l oe samoled onc ev rv three re:ueling cycles. A co . ac'a.s b n a~'arced to an outside laborator., to analyze these sampl s. In oroer to ob='a.n su table sano'es for analvs.'s spec.a sa.-.p 'ng eo 'pment is recu'ed. Th's eouipment 's oescr."oed below'.

samo 'ng pro ecuiooed .-i h aciustzble =los me=er and filters o>>>:e'ucleopore teo a" bag eou.poed >." -h isolation vaLve hyg rome te

!he aooroor a test oroc dure J instruct personne'o>- and >:here o cra-

-he a ~

= sam" es, be .. plac p 'o to the n xt re=u '." ou=ag

13-HS-A20 Al thou h th

'PPENDIXin'rocedu P C

e is not co specia t'est procedu.e on Mork author =at'o ion (V') ~ 010~"052 <as 1ssued to perform t..e nitial instrumen air sampl'n"6 Tne ai sample draL:n during, this,t e analy"ed for moisture, particulate and hydrocarbons. The acceptance,criter a are as follows:

Particulate 10 microns DeLaoint -10 Hydrocarbons 3 ppm The accep

.installed drve-conL.itiors Co 'l ance

'>>'ere cr te 'a .or part culate e..'ltf'> o- size ' o.

revieMeo and used to 10 was based micrcns.:or dete~'n" on the deLpoint

. e acceptance presentlv l oca 'ii

c c"i-eria.

The nydrocarbon accentance cr<<te-ia L:as based on in'o.mat on "rom-the sta <<u l Lisil packages ~ Because the compressors are an o'l:ree type, no oi: l o hycrocarbons vere foL!nc 1n 'tne 0 na ':ll'sh samples. The th" e (3) ppm acc p"ance c='-eria L:as baseo on i this L."th a ig t aOL:ance for s 1.'

natu:al hacky"ound leve s of methane.

s no. fo" hydrocarbons L:ill be per=ormed du"'r o "his s pec a . tes <<. <<Lnd

<<hp<<L oni<<c a ter a maior-svstpm ...Od'a 8 A-c'- 'on, '.e. Comoressor "e emer.

d <<p <<p<<<< iL <<e. :l ----,

ci- <<pp L:a-

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r-ring t>~e om-r sso.s. Lhe oryers are an act<<vated cess" can- typo. SL t. 0Guc 1 on o 0'1 'nto the 'ns-r ~cot a'r sys e.-. = ro" hese c omponents is no. cr c-ble.

h " ore, pending s t's ~ p ~~ >

ur-he-hydrocaroon testi-- c:i be per=c=.ec excep as =rev ous'y s<<a" ec

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13-'HS-A20 APPENDXX C pie'or 'the special tes- <as taken on reb"ua iPPa an n,'iso~en al Industr al Research Associates (zg> ) fc analysis..The resu'ts resul s o the air sar..pie are no expected before this

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response is due 'to the hRC. Thhere.ore, vxth n 30 aays of rece'pt, LP&L iill proi'ide he hVC a s" a event of o -~ " "3 'ins rv~ent-ates.ord Mat .

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air quality.

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13-HS-A20 APPE';1DIX C S t.C. ioN

.; -

i . vas prep- ed of the maj or instrument air system components

..aintenance LI procedures', cal'bration procedu es and "e"e 't've tas 's for these components vere identified and reviewed for adeouacy This reviev, as veil as compressor flov tests vhich shall be discussed furt,he. in Sec t.ion Iii, ident,i ied several deficiencies. The vendor manu.

used to reMork the Hash sh air ai compressors +as found to be inadeouate. kith vendo. assistance the ve ndor d manual vas revieved and the deficiencies <e:

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iden"- .'.ied. This, manual to be revised to incorporato the necessarv

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's in:orma icn. To ensure the adeouacy of the upd'a ed manua'n:ormation, this in:ormation ~'as utilized to revork a stat.ion a'r compressor, vhose vu put, had degraded. (HOT:.: 4'a er:ord 3 uses he same mode! Yash compresso. in bo"h he .'nstrument and' 2 on a',stems. ) The rosult that comp essor capacity vas eturn d to an accep 2 le eve Arother prob em assoc.'ated vith the above vas a 1a ck.. o= post. ma'n" enance flo~ testing. rior t.o hose concuc=ed in.December 1488 f>ov t,es-s ve e not pe =ormed tollovi"8 epa.'rs or over'"au's of 'rstrument or se";'c a'-

coiip essors ~ T>e eou reme" ts to oer=orm a ovine compresso ma n-enance vil be incorporated 'nto the appropr'at,e procedures. Ho otho" d ='c'encies vere id .",= = ed ~ ~4 ~ 4 eem+O

~~ ~ air syste.. comoonen procedur s.

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13-HS-A20

~ . be above,

<< APPENPIX C procedures cal'b"a ion main enanc p occdli c5 and repetitive tasks for tbc safety related ai" o~e rate d coc:ponents Mere revie'ed for a 'eouacy. !io maior deficiencies <<ere d"scov "c' 5 revie<<'. Seve .al e.. ancemen s vere iden-'cd and are bei.

eing eva'uated fo p ssible 'mnleme." ation ~L ~

A review o= no.mal, emerg ncv and off-normal ope"at'ng proce ures Mas pe..o.med o, dete. ...'ne <<'hich addressed or need ed t, o a ddrress actions fol11.oving loss of instrument air. In addition to the nine (9) Emergencv Operating Procedures tbe folio<<'ing f ive (5) procedures Mere iden 'd

.-->00-vOn, An" nciator Response for Con rol Room Cabine 0".--:00-00"-, Annuncia or Response :or Control Room Cabinet H Or-.OO-OIO, ns ~nn nc'a or Response for Con rol Room Cao n .t

, al v,c ion 0""-G".-0 c em s . i z Os>

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istem do - od as potent'a de='c enc'es. They a e p eseia ~v bc g v'c<<'~c <<.itb Operzt,'ons pe sonnel. Appropr'a-e proce 're

'm em c by the nex re=1-'e1-n outage for those items con= rmec as de='c nc es.

l. 0."- OG-Oj0 noes no cou' bio<<oo<<n oC thc ls umcn 2 5:stem oo<<ns oa<< o= the cryers << "enever the 'nst 1' 5 A' i'c assec I -2

13-MS-A20 APPENDIX C Maintenance personnel, excluding engin and superviso."s, receive gene".

o'a o.'ant svste= ra.ning and spec. fic raining in the'" resnectiv 1 a, d

i.e. e'ectr'cal. ho spec': c train.ng zs given h main e" ance craft.

personne'egarding loss of instrument ai. and/or he e'a ed procedures.

Tnis t:ain- ng vou'.d not be relevant to the duties these indiv duals are expected to perform.

Engineerih g personnel includ ng Hain enance eng neers and superv'sors air system train'ng under

're o fered inst,rument the "system of the month tra'n'ng p.ogram. Th s tra'n'ng not on'y covers svs em and component operating parameters but also provides training on the follow'ing procecu es:

Ope.a 'ng Procedure G."-"3-015: Instrument Air Svstem Qf c norma p ocecu e Qp-001 03S: gns ument A~ Svs<<em

,Hal u<<action Th.'s train'ng has bee" reviewed and considered adeouate =or these ind'iduals.

Opera tions personne as pa o the ": cense trai" ng <<ece'e svstem an o =-normal procedure training. They also receive simulator rain'ng involvl..g loss 0 ' s u e 2'evie~ c: t..'s ra'n ng has oeen performec ano fou"d o be adeo ate

13-MS-A20

/ APPENDIX C SECTION III A review of the instrument air supp'ly sys em ias pe. formed bv LPSL. The ability cf th'e system to supply the required ouanti-y ard oua litv o f ai r was reevaluated. Testing was also performed to determine the present condition of the equipmcnt.

As previously discussed in Sect'on I, the only air ouality requirements for the supply system or air operated components are clean, dry air. The acceptance criteria established in the sampling procedure wll satisfy these air reou'ments. It is anticipated tha 'when the results of the initial a'amp e are rece'ved,. =he accep"ance c".'r" will be a met.

Ins'um .".: a'" comoressor des'gn and pe" ormance were rev'ed. Tne or'ginal system design reouired the capacitv of each comoresso. to.be 80 SC.=.'l at I00 PSIG. Compressor capacity tests per ormed n Dec mbe 1988 showed t..at bo-h:nstru.=ent z = coc:pressors were operat'ng at considerably less than th.s capac. y. A deta'led analysis pe =o~ed by LPcL determined tha- the plan- a'r de-and was approxi=ately 280 SC~.

The operation of the fter/drver assemblies was also reviewed. ach as sem'olv

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rated a 360 SCW. anile in ope ration, each ' -e "/drve-assemoly recuir s approxi-a e'y 60 SC:... cont nuous: ow for regeneration.

This 'regeneration flow is d'scharged to atmosphere ano 's there'ore los-

.rom the system. Comp essor output 's sp between the two assemblies.

.xcept .cr mai"t "a"ce pe .ocs, both dr;ers are conti "ous'v r se v ce Th's mea "s a regeneration f 'ow o approximate>v '."0 SC:..".. s cont-'=uouslv los- -o atmospnere.

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13-MS-A20 APPENDIX C Civen z system demand o. aooroximately 2SO SC-" >>d 'er/dryer purge require=ents of app ox.mately I?0 SCQ, a total of approximate} 400 SC:,

needed for no.=al plant operation. In their p.esen condit.'on "oth compresso"s are reou. red full time to meet the ~io<< re r oui uirements. vnce compressors are reworked one compresso" ope"a 'ngg fu>1 t'ime 2nd another load ng intermittent}y should provide the required flo<<. Re<<ork of the instrument air compressors Mil'e completed bv the nex r e fueng outa ge To reduc compressor demands, the possibility of using one fi'lter/drver assembly at a t me. s being considered. Full flo<< through one assemblv h:

been attemoted 'th t..sat

~ith u". s actor's resu ts. ihe pressure aron across the assemblv exceeded vendor recor:.mendations, The cause of the p"essu"e ""or a eros s the .'V e /d-yye. zssem' '~j

/d 's be'rg inves iga=ea.

4 Deperding on the results oi th's investigatior., -he use of a single assemoly <<'ith the other in standby is being co,.s.dered. This should reduce the re "eneration f'.o<<'oui cmen s cons c 2 i the bv 0 c s'ng compressor oemancs Nni evaluating system performance, ter=' several i-ems <<hich could increase svstem re'iao'1-'v <<ere dentified. These ite. s vi 'e evaluated ~or possibl '..corpo "at on. Thev zre as o 0'<<'s:

Replace IQ m econ drye a e rs <<'i th 0. 3 micron absolute 41 o>> s.

Install au" omztic drain vzlves ".. -he drver .~r = e-

13-HS-A20 APPENDIX C Install manual drain valves on instr"went and "serv>>ce air recc'e s

4. ~

R.- cva lua 1 ua e the .i ter/dr,'er bypass setpo'nt value.

On the basis o~ the above evaluation the ins "ument

. e~

ai svstem is meet

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its intendended~ .unc.ion; providing adequate amounts of clean, dry air. Ei Mith the compressors at less than rated capac'tv, the sys em's performan is adequate to satisfy plant requirements.

The system as p i descr." ption. .

iit v "

Seve.al S

is p.esent.y operating vas compared to the i

minor disc epanc es ~ere found. As E'SAR previous>v svsrem discuss d seve- al1 ideas for possibly increas ng system reliability and/c c ency ~ere identi'ed durin~ s~'s em rev' rev ev. Tnese i"e...s are curren:

being evaluated for pos s.'ble inco po a ion. A te maYing the i'na1

( determina system, the on >>s

""S.~R to which,

~ill i'ny, of the above then be revised to make necessary c:ill be acded to the correc-'ons and ref'ec all enhancements.

As stated in Se -on i, ka e":ord 3 has lI3 safetv-related valves and dampe s o e aure positio, olLO<'g 'oss 0 Ls um t c, 0 eac, component vas ident'ied. This 4'as -. en compared to the actua'omoonent C>>ai~ u pos tio ~a ~ P ll comoonents a ed to the reouired oos'ion

. er'od'c surveiances a e per=o med o ensure valv operaoilitv.

addition -o ths, a. ope ated comoonen s ~ere success=u~ ~y- este'r lo ~

o. nstr e nt air and po~er during pre-ope a ional s-artup s---

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"=a c'"

component ~as ested nc vtoua' as par= o= s resoec ve svs-em's pre-operational tes-.

13-MS-A20 APPEND IX C

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A ~ur ihc v rrcv1 cw oi c above comDoncnts was perfo=med t.o dete ine wh recc'ved an ".""'Cd Sa ety .caturc (r~ ~

) ac-uat on signa'. The s igna and correspondn' p os

' tion .or each component was iden'i ied. The positions these c o mpone is were recuired to move to on th e<<a ir ICSDeCt1Ve actuation si s.'gnals were ver'fied t.o be correc . Th ese va've ooerations ar ested periodically unde. the following surveillance procedures.

OP-903-02o Safety Injectaon Actuation Signal Test S

OP-903-032, Quarter}y'ISI Valve Tests OP-903-033, Cold Shutdown ISI Valve Tes s OP-903-036, Contairment Spray Ac uation Signal Test OP-903-040, Containment Isolation Actuation Signal Test OD op"3-00477, eEmergency reedwate" Ac uation Signa> Tes-

. -.03-09},

ops no Pecirculat'on Actuation Signal Tes OD opr poo n Steam Isolation Actuation S go a Test OD<<O03-094 <<Sr AS SL<<~g oL' Re av ~est - Ooera ir.g OP-cp3-OoS <<<<w aS Subg ouD Relav Tes- - chutdown A review of a>>

11 sa etv-re 1aied valves was a~so ~e"=ca e d. o ioenti-y which were scrv.'ced bv accu=ulaiors. 1h'y tour (34) valves use n'troge..

accu-u'ators and 24 are provided with air accumu>ato"s rout (4) othe" componen s, t.o be addresseo la e- th'n is section, we e loen eo as need'ng fur h " eva'nation

.c 'as reviewed -hee ce c s'~n oi he nitrogen acc ~u aior systems. ~no-e 4

a e te acc'-.u a ors 'c se."'ce ~~'valves. These accumu'ato-s we veri=ied to be of su= 'c "= s'"e to sat'sfy the tim ana stro):e eou'e~e SDeCt-ve va veS. T DA

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a so r viewec des'gr.

13-MS-A20 APPENDIX C ravings to verify ha he seismic and pipi"g class reouirements ~e"e e

correct o" the ni rogen acc -ulator systems. These vere ound to be acceptable for the'r in ended 'unc ions it snould be noted ha- the seismic oualif'cation of individual comnonen a"sociated vith valves and/or valve operators, i.e. filter regula ors I electric/pneumatic transducers etc., ~ere not reviewed. This 'individual

.-omponent record sea. ch and verifica cion +as determ'ned to be bevond the scooe of Gene<<ic Letter 8S-14.

Ai" accumulators .are ins-alled on 24 valves. The function of these 24 valves vas re-reviewed to determi"e their reou re,.enrs for operat n post acc.oent. Oi tne 24 valves, only 2 (Si 602A c 3; Safety injection Rec rculat.'on Sump Outle Va ves) ~'ere reou red to change position fol oiing loss o: instr ment air to mitigate the conseou nces of an acc" den . One (:) valve (CC 620; Fuel ."ool'ieat ".xchan"er Temnerature Control 'Halve) reo "red an accumulator on'y to close o 'ts " a C p II pos'"ion oa loss o=:ns-r went a "... For the rema'ni"g 2l valves, position they fail to o loss o= ins" rument a' +as determined to be a S?.~e pos t oa ~ . Th se valves are not reouired to chang ~"om th s pos't'on for sa=e shutdown,or acc'cen mitigation. The'" respect ve accumu 1

a. ors, ther ore per=orm no sa:ety-related fuse- ons assoc aced v',

~

'

va 've a ua '...'ough 'av be co..ve ent 0 .  ?. Ooe  ? 'a a s andpo.'nt to opera e hese 2'. valves olloving loss o: ns=rument

't. 's no reou'rec. acc .ators 'or t"ese 2l va ves are there ore 0 t:-.is g " ric e==er a"c <

a review o capaci y, seismic and,piping class requirements

( vas performed bv LPSi. and found t.o, be adequate as is.'

ir 'accumulators assoc '

ted with valves SI 602A c 8 were sized t o all each valve to cycle once vithin an hour of losing,instrv~ent air. This v verified by test in Augus, 1958 unde WA 99000219. However, during desi review, the possib litv these valves may need to operate bevond the prese:

60 m'nute limi:t vas identified. This situation is be'ng reviewed further by LPc 'nde." P oblem Evaluation/In ormation Request (PEIR) 10673.'uring th above reviews, four (4) additional components were 'dentified

~

whose position for an Eng'neered Safety Pea ure (ES:-) actuation signal is differen from 'ts loss oi instr'~ent air posi-ion. These componen s either co no- have accumulators or have ones that have no be n tested.

Th v a.e:

SVS 101 a 1C:; Sv -chgea .",akeup Dampers cV )54A 6 3; Feedvater lsolat'on Valves c ves 8 l54 c" QL st close on 2 ma n steam 'solation s- gnal ( e'S) ese vz ves have small accumulators as pa = of he'r ooera o assemolies but are not leai: tes-ec. This situat'on vas r v ewed by Lpe . The D Q' g la o valves w 173A a 8 and h s a 1 ocA cc c'csed or. a 1oss of ns rumen air. There'o.e, e cva-er rso 2 '.. va ves 1 154A ='v. I n valves i 2 r: 1 as is 0 loss o s "Ie

~

s

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I ~r. d anc ' 160A cx 3 vi 1 c'ose. Surve' 'arce test 'ng o these va 'es to insure ope.ab y .'s discussed later in his sec=.'o".

o

4>

13-MS-A20 APPENDIX C SVS )01 6 102 arre .a' open daupers <<hich Mere original'y d esigne to clo oa a safety injection ac uation signal (SIAS). These components do not have accv".ulators. ~T under PE'H. 10672, has r evieMed the above and det'ermined t.he SIAS LPaL, I~S to these comnonents is not re"v.'ed q 'or sa.e C "s'tdo<<n oc o e plant or to mi". gate the consequences of an accident,. Therefore the fail open position on loss of'nstrument air is acceptable.

Leak testin g of the. a ccrmulator systems had only been performed on the nitrog n accumulators. During startun th e ten (10)

( ) nitrogen accumulators vere tested in accordance <<ith SPO-25-001. 'g Du"'ag ope ope ra t.'n, surve "at.'r i lance procedure OP-903-032 leak t,es ted t,he t<<'o check valves asso'ciat.ed <<'ith each accumulator system. 'A revieM of th's procedure ident'ied a need to reevalvat.e the test durat on and acceptance cri er'z Tes req "'remen:s,nave be .". re-eva'lua ec anc the above procecure <<'i' be rev sed. T<<o (2) separate tests <<'ill no<<'e pe" ormed on each n'trogen accumulator. The fi st is a check valve one aoi3.'"v -est to be ner'o~ed onc a ovarter. Th's is a functional t.est -o nsure the check va'ves are not stvck in the onen pos'on.

Th secondd 's a sys" em leakage 'test <<h ch <<'i1l b e per:ormed once everv 18 months P'ach nitrogen accumv1 a nor <<'> ll be rsola ted rom ' res res'pec i'e al and n'rogen sources for a prede ermned t'me. Any eak'ng components

<<"; th' the test boundarv <<ill be id n

"'

ec. P t he end'=

pressure crop and s'ubsequent leakage for the acc aula o" <<i11 b>>

ae e rmined. T"is ~ s ~

I \A i 11 oe aaoed o svrve': la" ce -roc dur>>

O~-o0.-033

~O

~

i i

13- MS - A20 APPENDIX C As discussed earlier in this is sect on, only hree (3 of the 24 valve,s vi "ir accumula o s are, Mithin the scope of th's report and require testin"6 Tne accu-u'ator leakage tests for va'ves SI ~

60'>'

1 B ave been added to have t surve llance proce'dure OP-903-032. The fa 1 safe position of valve CC 6 is closed. It has no safety rela ed requiremen to move from th's posi.'on.

os 1" on The only furction of the accumulator is to fail this modulatii valve closed on loss of instrument air. A leak or caoacity test is not applicable in this instance. To ensure valve operability, a func ional test <<'hich fa'ls air to the valve and veri ies closure <<ill be pe" orme once every )8 months. This functional test <<ill also be part, of 0>-o03-0".".

As nreviouslv disc"sse" sc ssed, . e c osing o: valves "4 173A & B and .""w'66A 6 a's

.'n loss of 'nstrument used in lieu of leak. testing the accumulators on >'84A a 8 To nsure he above, a runct:ona'est <<'hich 'as a'" to

-he ""~ ]73A c 3 and o.~ a 3 and ver.' es closure <<'ill be performea onc every'co'c shutdo<<n. .".' functior.a 1 test <<ill be pa>>" o- QP-903-033.

The above chan~es'"

ng -'e

<<.ill ncorporated in o su ~eillance procedu h es

..d 0 ".0~"0.~ by the next re=ue"g outa complct on c" these pr o cedure revxsaons, test ng Mall be aaeouate to censure oo o '. o tho requ red accumulator systems

'0 II 0

13-HS-A20 APPENDIX C

2. O?-901"038 does not s those components +hose pos1txon on an EST signal is d'i..e.ent than it s failure posi-ion on a loss o Inst um Air

3. Neither 0?-901-038 nor 0?-500-OOS .e:erence th e ir. a ab3.e Spent r"u<

Pool seals.

0?-3-016 d'id not. describe how to set the purge ra e on the Instrumen Air Dryers.

0 ~ OP-3-016, Step 6.1.11 onl y reou'res bio~down o. the sys em ~

in during st.rtup through SA-1271 and IA-140. "h's ti 7 .'s is satis=ac-ory if no mois ur is oiscove.ed dur ng bio+down. .f mo's-ure 's found, thea additional bio~doc:n at o her point.s may,be necessa.y- .'o ensu e t ere is no moisture in the svstem.

The .mergencv Ooerat ng ?roc dur~ (EO~) csee."'is p

PS~ 404-A(3) and PSL 406-A(B). The Unique Ãumbe iden" i=ication (U'i D) num'oers .or these va'ves have beea changeo t,o. S L 8004-A(3) ant SSL 8006-A(3).

~

A cv ec: o the tra'ning rece:ved by Operations, ."maintenance and

~

Engineer'ng persona > ias per=ormed. .he re'"'ei ~as to de erm'ne which groups rece ved or needed to rece ve train'ng rela- d to a loss of

'rs  :,ument ai" even= and "he adecuac" thereof