ML20214E580
| ML20214E580 | |
| Person / Time | |
|---|---|
| Site: | Crystal River, 05000000 |
| Issue date: | 07/31/1981 |
| From: | Enzinna R, Jeffery Lynch BABCOCK & WILCOX CO. |
| To: | |
| Shared Package | |
| ML20214E454 | List: |
| References | |
| 32-1126985, 32-1126985-00, NUDOCS 8705220153 | |
| Download: ML20214E580 (73) | |
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I Reliability Analysis i
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Nuclear Generating Station t
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Plan: Perfor:2ance Engineer 1:s habcock and 'JLicox Nuclear Power Generation Division P.O. Box 1260 Lynchburg Virgtnta 21503
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. Cc=:ribu:crs es Sy:::en :navailabili:r 3-1 B
a.0 CONC."SICNS A .J EN'DA 10NS a-1 "aferescas Appendix A - Tad: 7:e 4 A-1 appandix 3 - St.:=an 3allabiliry Ivan: :ees 3-; C-1 I Appacidiz C - System Descripcion Overview CD kCD C C" C' es[*! 66mJ.h.w@
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! =bise Tirr e Ob 0-ic:bine Tigne h :-8 C-9 I Turbine Firas Od 3ase case Figura 3 C-10 1
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32-1126985- 00 ~ B.2-1126985-.p
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Sis repor prese=:s a su=ary f .he a:alysis :4.h:ds a:d results of the proposed Crys:a1 River-3 I.=arge::7 yeedn=e: (74) Systes
-hree
- pt.=p configuracie:. The objectives of .his study were to:
- 1. ?arfor= a de-='* ed a:alysis :o assess he rela ive re'.iab111:7
. of each of the propcsed F4 desig: optic:s.
- 2. destify do-d-=-: co ::ibu:s:s _o systm =ava11abili:7 for each design op ica.
- 3. C = pare che rela:ive reliabill:1es of each :f :he p:: posed desig: op: ions so the reliab111:7 1: crease associa:ed vi.h ead desig =ay be used as input :o a cost benefit analysis.
his repor: doc =e::s de analysis =adods used i==* u'd g assi.=p:1::s ada and a:alyti.a1 tools e=p* yed, n e resul:s are ;;esenced is be h quanti:a:ive and quali:a.1ve :a:=s. ~he :.=sa-ical results 1 clude probabili:7 of f ailure per de=asd and probabili:7 of failure per year of de FJ systa= to preperly i=1:ia:e. De qualita:ive res.21:s include ide::if1:a:1:n af =ador f allure :::::ibu:::s, discuss 1:n of dair si;; 1?icance vi.h respec: :s sys:e= reliabili:7. and cc clusiccs draws from the resul:s. he addition of a third EJ pu=p does so: i= pac: the u= availability of the Con::al, yeed 0:17 Good Genera:or, or Over^ ' ' 2 a:ac:1on systems. Tharefore, this a:alysis add:essas only the impac: the add
- tion of tha j l
-. :hird EJ pump has on the i=1:1a:1cu system. , 1 A simplified systen description and pipi=g a:d "ss:r.:sen:a:1ca diagra= for the :vo pump sys:ss and for each of the hree pu=p svs:em op:1ons are included i: Appendix C. r 1-1 E a.x,s -aaL
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32-1126985- 00
/ ?.ro :p:i :s vare avalua:ad f:: ha third ITa' pt::::p. a : :51:e driver and a :no::: driver vi:h dadica:ed diesel gasera:::. 1: addi:1.. . :.ro staz= supply =p:1: s f:: .he :.:. bica drivers and thras ; =p sue:12:
optiens were evalua:ed. ne dedi:ated diasal genera:or was censidered :s he sore favorable a power sour:a f:: ha ::o =: drive 7.::=s .han diesel ca:a:a::: 23. A greata: 1 ::aasa 1: re114h111:7 is expec:ed due :: da diversity in: oduced by he dedica:ad itasal ga era::: and .he av:11as:a f potential : c =oda failcre of diesals 1A a:d 33. Also, losa =f affsite and ons1:a pc. er figuras signif1:ss:17 in existi:3 pla= risa s:uitas. C: .his basis tha =p:1.~ of a =c::: drive: pt. p powered by diesel genera::: 33 was o: considered. I l 1 I i 1-2 1 8d \ gG %g m .. o .c q B
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u LL e.._. .. __.3.2 Taul: :ee analys's was he 7 :ary sa:h:d sed :: evalu:e the 0:7s.21 I.17e: 3 IT4 sys:a= thras pu=p desig: :p_i::s. sad as a basis is: c:=parison. .he es*iabili:7 sf :he :vo ::ti: sys:a= vas ab:t. iced fr:= _he :eport "Isargas:7 Tee:va:a 57sta= !; grade Ia112 hili:7 1:a17 sis for the Crystal liver ;uelaa: 04: era:1=g 5:4:1: :' : !;o. 2" (4). C ce ne f aul: ::ees were :::s:: c:ad f:: aach ep:1::, imp:::as: -'-'-=1 f cuts sa:s were fou d usi 5 the Taul: :ee Analysis ?::g:s=, 7 A? (l' . Tailure data, obtal ad fr:= yubli:*.7 availab*.a seur:es, were das used to quas:ify .hese cu: se s. E - - er :: pr:babi*.1:ias used is de uzssifica:10: vere devel: ped using the aced =1:g7 described is S e C i:*. 1.1.
'"he resui:s of this analysis i=cluda .he d '-= : :::: ibu: :s :s sys:s= failure and systa= unavsd.lah'11:ias.
Successful syste= opera:1::, faul: ::ee a=aly[ris , h"-' reliability a:417 sis, and f ailure da.s are discussed is :he f:* *.:vis; secti::s. 1.1 I . Tault Tree Anal sis Taul: 7:ee Analysis consis:es: vd_:h de a.hodele:7 dese 1 bed in the f Taul 7:ee Handbook ?.~rRIG-0492 (1) was used to evaluate the re11abili:7 of de ET43. D e co=ple:e faul: crees for .he ITJS are included in Appendiz A. he f aul: :rees were cons::ue:ed :o a level of deta11 suffician: to iden:ify all relevan: co=:en hardware in de systa=. "his level of analysis al. loved iden:ifica:1on of hardware which would, if failed, I I 2-1 9 SUPERSEDED
i 32-1126985- 00 reduca desi;=ed :adundase r or cause :he f ailure of :: hor hardware. l S ara was to at:a=p: :s ac::u== f:: c ===:411:1es i=p: sed by ex:ar a*. l avests such as firas, f1:ods, or earthquakaa. := adii:1: to mecha=1:a1 f ailure of hardware, f ailure causas due :o hu=as ac:1::s and :ss: or aas:a asca ac:1P.:ies were i=cluded. l l l 3e cc=su er code T:AP (2) was used fs: qua=:af t:stie af the faul:
- ass, ranking of basi even: i= porta:ce, and if a=:131:a:1cs of =ajo
- ss::thu:::s :s systa= failure.
- 2. 2 3 r.as Reliabili-v Anaivsis n a Hu=an 14114b111:7 Asafysia (EZA) was parf::=ad :::sistas: vi.h the
=a:hodolo37 4aserthad is ' ??2:/77.-;279. Wa:f5eek :f Emas 'ta*.1abi11 r Muivsis vtth T.=shasis e: 'fu:las: 7ever plan: AmS*.1: :to s (3). Se basic hu=an arra ratas are found in Chaptar 20 of Reference 3.
Nu=arous data bases for component (hardware) failure ratas are available hevever, f ew data bases exisc is; hu=an erro; ra:as. A :ach=1que developed at Sandia
- aboracaries (3) was used to q.t.antify hu=as er:::
probabili:1es. Probabili:7 ::ee diagrams for the hu=as tasks of interes: i were co:structed and are presented in Append 1= 3. 1
- .3 rat:urs :a:a . fro m 32 - 112 l.04 I -00 4 O/A*wA Y-Ge:aric cozzponen: failure data were obtained from publicly available h
sources. These data vere updated or tsada plant specific, by using the component failure data obtal*.2nd from Crystal River-3 esperience.
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- GENERAL CALCULATIONS 32-1126985- 00 '
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GENERAL CALCULATIONS 32-1126985- 00 9 'b'* Ina depaie 5 +ea m fv i+;= tu
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- . m ss1 = s==:e.s :eet-2-1 = 698 5- 00 h ords- to evaha:e :he i=pa:: Of ::=peten: fad hras : systa=
- s'.iabili:7 as azp*.ici: defi=iti = Of _issi:= sue:ess is required.
To: 1:1.ia-des, systa= =ava11abili:ias vers :sicula ad fs : ro casas; th e firs: casa represa=:s s: is:17 aute:E:10 i:1:12:10: of the systac:, a=d be sec:=d casa all:vs : para: ors to iscarva:a :o correc: sys:a= faihres vi:hi: 20 =isu:as. liiss1= success is defi=ed as a::ai:- I =es: of adequa:a fi:v f := a: leas: =e ;u=p := a: laas: :se staa= gerara:::. 2.5 Ass _m_ -i ns 3 evalua:iss the I2 t3 reliabi*.1:; the is11ovi g asst =:p:1: s vera =ade:
- 1. he varicus sys tas ::sfi;;;;a:icts a:d f hid sys:a= =c=penen:
idas:1fiers are as described i: A;pasiix 0 a:d as depic:ad in Tiguras ; ch.ough 3.
- 2. he :vo pt .? base casa desi;; is as depic:ad and described in "I:s:stscy Feedva:e Systa= Upgrade la11abili:7 Asalysis for *.he Crystal " Liver Nuclear Geserating 5:stien hi: No. 3", 3 W Doce=en:
No. 32 .122431.-00, April 1931.
- 3. he code saf a:7 valve stuck open vas c:ssa:va:1ve17 c= sifered a failure of : bat seas = generat:: :s supply adequa:e s:as: :o detva a turbine driven pu=p.
{ 4. For a
- oss of Offsi:a Power (LOOP) =ansient or a non-LCOP transian:
it was assumed that all code safety valves on both steas generators vould opes. == 5. Degraded failures were not considered, th.at is, components were assu=ed to operate properly or were treated as failed. Fo r === 91a, the failure rate for code safety valve fails to resest does not distinguish between degraded failuras and catastrophic failures. This is a conservatism since experience has shown that is most instances where code safety valves do not resamt at the specified
'3UPERSEDED
32-1126985- 0.0 se:pci :, . hey do resea: a: a s e-ta: 1 ver sa:p:i.: tha: ay s * se :::sidered a se.::ess, a:d ra aly do :he ::de sade:7 - a .ves fail :: resea: a .irely.
- 6. A' ". IT . relays a:e solid s a:e.
- 7. 0:17 ::e IW pu=p is a*.1:ved is preve::ive ais:anasce a: a ti=e.
- 3. he =c:=r-drive: IW pu== a:d i:s dediza:ed diesel e era:::
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,i,,cy ,= ,,ua;7, t 9. ~he third II'.' pu=p , whether sc::: :: :=bise drives, vill ha~e
.I 1:s =a1= and al:e : ate sc :1 valves, ::.-3A a:d IT~-il, f 12:erlocked is .he sa=e va? as f : pu=ps II?-1 a:d II?-2.
- 13. S e .hird I W pu=p, vte:her =o::: :: :-rhi e drive =, will be actua:ed per I?!C cha==e1 A :: 3. !d :he :: 51:e drive: ;==p is chose: 1:s stes== ad=1ssies valve- (1 any of the pr: posed i
ec figuratiens) vill also be actua:ed per c'-mn el A :: 3. t . d d\ k ',k U 3 uc.M cd0"f6 - p o.
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- 3. 22s- s 32-1126985- 00 3.1 ?e_a=: ira:1ve 2esu*:s Sys:e= c=availab':1es were :sicula:ed f:: the _hree pu- p C desi = op:1ons described i Appes- C. lasults of ha :.ro pu=p sys:e= reliabili:7 a=alysis (3.ef erence .*.) are repeared here for es=-
pariso: purposes. ::availabili:1es were ca.1:ula:ed f 9r :vo cases:
-he firs: case represents s ric_17 au:::a-*
- d '-iatics, and _he second ' case allows operators to i=:errene to ::::ac: sys:e= failures vi hi: 20 _._' =u:es .
?c'i=: esti=a:es of sys:e= u= availabilities a=d f ailures per year are prese=:ed i: Table 3-1. A discussi = of the i=por a=: failure c::: ibu: ors for each desi.g= cp:1o= f=11 vs. i= porta =: failure co=-
- ibu: ors are su==arized i= Table 3-2.
3.2 .=cor:an: Con:-ibutors to Svsta= trava11abili:v_ 3.2.1 ?.ro Pu== Svst em 3.2.1.1 II** Initiaties (fuliv automatie initia:1en)
- 1. Pu=p I??-1 u=availab111:7 is d =1=a:ed by loss of offsi:e power and subseque=t diesel genera:ce failure.
- 2. ?u=p I??-2 unavailaoili:7 is de=1=a:ed by =echa=ical failure of stea= sd=ission valve AS7-5 or pu=p =ar'-W e=1 failure.
_ 3. A =ajor contribu:or to unavm412h111cy of either or both trai=s is inadvertenc failure to realigs pu=ps after pu=p =eis:enance. 3.2.1.2 m siciation (includes soerator cor ee:1ve action) ; 1 '. 1. Tha =ajor concributoe to pu=p I??-1 unavailabili:7 is loss of l t offsize power and subsequent diesel generator failure or pu=p
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'$UPERSEDED
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32-1126985- 00
- 2. ?=p II?-2 =. availability is f '-=:ed by beis; ::: Of service f:: --d-:e=a=ce : pe=p _ac'-= ':21 fai1= e.
2.2.2 -" r e e 5 _ .- Svs ta= vi _h . ::: Orive: 7:1 d h _: a-d Oedicated Oiesel Generate I Wi:h a == :: drive: .hird ;.==p povered by a dedica:ed diesel genera::: de u=availabili y of pu=p IF?-3 is d '-=:ed by f ail :e of de dedica:ed diesel gemera::: and 1:ss of offsi:e p=ver. ~:pc _ a=: fa'12:e contribu: ors for the o:her two pe=p ::ains are ce sa=a as for the :vo p=p systes (See:1s: 3.2.1). 2.2.3 T :ee ?r: Svste: 71:5 ! =bice 0-ive: Tsird S==
!=bine drives m unava11ab111:7 is deci=ared by f allure of _he s:ca= ge: erat:: :cde saf e:7 valves :o resea:. Eevever, i: 1s i=por:a=:
- o so:e assu=ptices 3,l, and 3 '.: Sec_10: 2.5 vi.h regards to :he code saie:7 valves.
0:ava11abill:7 of d e =o::: drives y=p, II?-1, is decina:ed by diasal ge= era:or 2A f ailure and loss . f offsite power. A= i=portan: = avail-ab111:7 cc=::ibu:o in :he au :=acic iniziatien cases (1.e , no f operator corrective ac:Los) is failure of de opera::: to realign pu=ps af ter saintenance. In de case of independent scea= supplies for each turbine driven pt .p (Option 2b), additional failure sce=arios beco=a i=portant. his is because e'd damti=s of the s:aa= supply cross connec rasui:s in fewer flow paths for pu=p staa= supplies. I: is =c:evor hy that having cross-connected stem = supplies presents so additional important 2., g SUPERSEDED
32-11269g5_99 failure c==: ibu:::s ever :he ' i=depende:: s:* " supplies. Sis is 1 because; yirs:, .he :vo sa:s :f d: ble : heck valves i: :he s:ea= li=es separa.1=g he ge:arators 7::vida a==le separa.is: =f he :vo s:aa= genera ::s. A=d sec==dly, he pr:bab".11:7 =f ob:=' ' g ve s:ca= due :s s1=gle or dochle s:aa= generator ITJ =verfill is very s=all with :he 1:s- h :10: of the IEC (Isa ge=:7 yeedva:e 1:1:12:10 and 1:::::1) sys:e= (Raference i) . *'hile
- i=:u.itinly, i: seens ha:
- ss-c===ec:ed s:aa= supplies =ay provida =cre pc:e::ial for c::=c:
=ede f ailre has i=depende : .s:aa= supplies, .he resul:s sh=v :ha:
I the i= dependent scez: supply c==figura_ics has a grea:e == availability beca:se each pu=o has fever staa= supply f1=v paths. 0:=m : ode failure tends :: effec: Sc:h stes= supply opti :s rela:17ely e ually because c s . ode failure is no: highly depende:: == stea=. supply pipi=g cc:figura:ies. Izparie=ce sh:vs -la: de
- a=: ess::ibu: ors to co n
= ode fallure tend to be systa= i=cerf aces, external even s, and hu=an err::.
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_ . a _ . .u ,...,__..____.m__,._ __.N.._.__._ . . . . . . - 32-112698.5- 00 T:e =availabili:7 avalua:i:= i= dica:es :ia: a ==::: d-ive: :iiri p=p -i_h dedica:ed diesel ga= era::: *4. _i=s la,1b,1:) results i= bar:e sys:e= reliabi'i:7 --- a :=bi=e drive: - '-d p=p (Cp:1:=s 22,2b,2c,2d). reis _s due :: the diversi:7 i= ::duced by add 1=g
.he =c:o drive =, diesel pove=ed p:=p.
1 . 4 y:: he :=bi=e d=ive= s:ez: supplies :he results i= dica:e tha: :he
- ss-c:_=e::ed stes= supply (Opti= 2a) is ==:e -= ' ' = b *.e _ha: he i=depe=de=: s:ez= supply ::= fig =a:i:= (Op _i:= 2b) for he reaso=s disc =ssed i Secti= 3.3.
hree differe=: p=3 sue:i:= :m= fig =a i=s were evalua:ed a=d de:e: ' ed
- s represe=: c=17 sligh: ." 'fere=:es 1: re*iabi'.i: . he red =da=:
suc:1:= li=e ce=fipra:ie i= yipres ib a=d 2d is by a s all =argi: . _he =os: :==nle because ': allows 7=p sue:ic= header =ai=:e=a=ce :o be perf :=ed sepa a:ely o= ea h of :he vo sec:ic=s =f _he header. T=e red - 's : sucti= valve :s=figra,.1:= i: yigures ". a=d 2: is :he
=ar: =cs: reliable. Addi=g a valve i= parzilel :s C-133 reduces
- he pr:babili:7 Of sue:io: li=e fi:= block. age; bu: '.cas cc: reduce the probabili:y of the sue:1o= li== bei=g i=adrer:en 17 lef: closed af:e:
=ai=:e=a=ce because both valves would be closed as a coupled action :s perdo= header =ai=:e=a=ce. he exis:i=g suc '.c= co=diprazion (yigures I la a=d 2a) is o=17 sligh-dy less eliable ha: -he ::her c== fig- a.1 =s.
*he A* 'fere=ce i= u=av=* ' =',111:7 betwee= .he three sue:1 = c:=diguratic=.s is so s=all ha: we co= sider i: to be i=s er*'ica==. I i
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l l 32-1126985- 00 3e =agligi":le iiif ere=ca '- ~~~ ' =bCity Of the vari::s su::i:=
- _figura:i =s is due largely to ' ' d :ati = :f the pr:babill:7 cf i=adver:e=: failure :: reope: valve C7-103 af e: header -*' ta=a=ce.
Sis h.=.a= er o: pr:babili:7 is -' ' d ed by valve lineup checki=g pr:cedures before s:2 :up a=d =c=:Ely f1=v :es:s af:e s:ar:up. A ::s:/be=efi: evaluati:= ca= be perfs: sed by 71:-ida ?:ver Corpora _in to de:e: ' e whe:her a -d Iy7 pu=p shculd be i=stal'ed. Although addi:1= cf a :hird pu=p represe=_s a subs:a=:ial decrease i= u= avail-ab' 7, 357 believes :ha: the :vo pu=p syste= pr:pesed i: Refere=ce 4
=av have a= adequa:ely sra.1; ==availab:7 3e :v,~. p_-_p sys te= should be caref.:lly ::= side ed, especially i ligh: ef _he pr:pesed upgrades i=cludi=g _he Iy!C systa= a=d fluid sys:e= cha=ges, a=d reco==e=da-d==s =ade 1: See:i== 1.0 =f Refere=ce 4 3e c=sa associa:ed vi_h i=stalla:1 = of a hird IT.; p.=:p (i=clud1=g pla=: d =) ca= be weighed agai=s: expected be:afi:s. Risk reduc _ie:
be=efi:s, easured i: :er=s of pla=: release pr: bah Ci_ies, ca= be qua=_if:.ed us:=g exis:1=g pla== risk s:udies as a basis. Cos:/be=eii: - goals for risk redue:i== have bee: suggested ra=ging f::= 5100 :o 31000 per =a=-re= averted. I= dddition :o risk reducric=, the ^4-d .: pu=p =ay provide o:her be=efits , such as i= creased pla== av=d 7 =%d:7 due :o redue:ic= cf forced ou: ages caused by tech =1 cal specifica:ic= 14--4_s, and reduc is= of regulatory pressure. I \ 4-2 2r SUPERSEDED
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32-112698,%.
- 1. 5. E. Roberts, a=d O. 7. Eaa.s!, Ta'd: Tree Ea=d'cek, 1 3 3-G-92, S.CV d er ,:r.gs.
- 2. r_A? O , Cc eurer - Aided Fa-d: Tree A alvsis. 3ah::ck and ~4il:cz 3ce==a=: Nu=ber 5?GL- 3 536, Jahrc.arv 5, 1983.
- 3. A. 3. Swai=, E. E. Gu -= , Ea=dbook of E"-" ?a a' : ilir A=alvsis
.ri:h T_=chasis e . Nuclear ?:.rer ?lar: AOlications, 5:37.G,C1-1273, I 0 ::bar 1960.
1 I=er e::v Feed. rarer Ses:e= Ter ade ?.e'iabili v A=al- sis f er the C- sta; 31:e- Nue'.ea Geners:12: 3:a:1e =i: No. 3, 3a': sci and k~il::x Coc=e= Nu=ber 32-112343a-00, April 1973. 1 1 I m (jo[,i e Lae,_h ~ DEDCh i
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