ML19322A365
| ML19322A365 | |
| Person / Time | |
|---|---|
| Site: | Oconee, Crane  |
| Issue date: | 04/15/1975 |
| From: | Phinney J, Pittman R BABCOCK & WILCOX CO. |
| To: | |
| References | |
| TASK-TF, TASK-TMR 533, PROB-750415, NUDOCS 7910040552 | |
| Download: ML19322A365 (21) | |
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TilLE t v u. 20 vaccsi :, css of W Incident (5/16/73)
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- 1. Cor.auetta af tect to establish why the neersency W r.mp did not stars.
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.P-filRTHER ACilCM REP.JIRED BY CTHER THAN SITE PERSCANEL f
Evaluate sp* e= trusient. (Eeacti=eter tape sen. to Lynchburg.)
d6 "hECOMMENDED Acif0N
- 1. Provide p.citive neans or sensira Icss or n pc(s to initiate
.reri ency r a ricv and main turbine trip. ( c g s o n,,.)
- 2. i.valute the sa railure nr.1 correct. (C#srowra) i
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"be 2::ergexy W ;.:=p did ret start l ifN.. ^
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- te device to initiate ties-e setions is c. ;rean.r :: sensor c the =alc W t.c sie r*( de,vnst r+ 6 of the W ;.=:p discharga valver, and t;stres: of the W
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- L, 11:.e R3 Jenetrat ton cr.e:1 hives.
"1.e W ;sp dischtrge valint au*.csatically Q.pp pgg clos-c cr. W F :=p trip s i isristed the sectics :
- W header that the g*p prer.sure cerner is Ic:ste in.
'7:e heeder re==i::ed above the 800 ;sig setpcint
- 3 vnl:h, if reneh L. vcul1 tave started the e=erge:ry W pu p (.v.ain turbine tri; Q
setpaint is TCO psig..) A 1" typass around the W m dis:targe valves is prr,-
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TRANSMITTAL SLIP FIELD CPGATIONS RITE PROBLD4 REORT ese CI PARED ***
PILE: 12M2 To P. J. Mccentiell For Information Contract 620-CO -O%
7.h C AO ( Terd
$m
$h G. E. KulyrYCh -_Sr.
Project D 78 er TITLE s
- c. F C. C. Plur.kett - Contract Ad: sin.
E" (d TA} C _ T DF /V I' %
Central big'rteering Files I. V. DeCarli - Quality Assurance DATE 9 I D ! ) 3 I,
The attached, cleared SIR is subraitted for your information.
s-j-
f'T
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l J. N. Kaelin-Arkanzss
-- J. P. Kmedy-SKD i
/. E. Suhrke K
w J. '. : L:as--
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- ( l J. D. Thinc q-Met Ed ffp Attached is one copy of Site Problem Report No. $13 which has been
- . recessed on Contrset 620 C/ 3 Your contract or contracts r.ay tave
[l the ;otential for a sfasilar problem. The Site Probless Report is heirg j.f forvardel for your infor:stica and use to prevent problesas frc= recurring on ks=
m 3
following contruts. A acre co=plete file on the proble:s is available in the b
i Nuclear Service area.
J I
RD(ARKS: CTT'H E C
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T I EARLY START DATE lACTL AL START D.'IE REQ'D C0itP.DATE 7
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I 9 SPACE 51 Less of n r.ei te-(5/16/73)
<$@TjT(h[{Y"mi}, PROBL EN g
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- egg, 0
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[tyd'-f h ih y [ :E ted af test to es stlish why the Enargency N p;.t f%q.NfSIM
- 7. Lp did "ot start.
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il ROutRED SY ' ThER 7tf AN SITE PER50h%EL N* r.
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' g,y g ;f q/, <. vide pcsitive nesna of sensing 1:ss af W pu::w to i Qg wy UM KWM irgency W ficv and r. sin turbine trip. [ C v s tom e c}nitiste r o 6
4 x
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W m.
ij At up;,roxinat ely 15t0 hrs. tha "A" :nin W punp tripped due te loss J
of suc.icn pressure. Oequence cf events as follow:
n rl
- 1. Less of all condensate booster punps (cperator error).
a
- S J '
- 4. hin W p.=p trip.
4
- 3. las cf Cf!SG vater inventory.
d q
- h. RCS te=perature and pressure 1ign.
p
- 5. Electro: a'.ie relief valve lifted.
- 6. Eesetor tr:,p on high pressure.
,q
,7. Main turbine trip, h
S. Ee ergency F
- pump started =anually (auto str.rt em med not received).
i M
Two auto:mtic actions did not occur. Se Dr.ergency W p=p did not s+ art l
cn loss of W p=ps and the saf. turbine did not trip on loss of W pumps.
4 The device to ir.itiate these actions is a precsure sensor on the =ain W f
headed downstreers of the W pump discharge valve., and upstrea= of the W line P3 penetration check valves. The W pump discharge valve au?.csatically closed en W pump trip and isolated the section of W header -hat the I
pressure sensor is located in.
The header remained above the 630 pe,ig setpoint
)
which, if reachel, vould haw started the emnergency W p=p (Main turbine trip
)
setpoir.t is 700 psig.) A 1" byrass around the W pu=p discharge valves is pro-j vided, but the bypass rahe was closed.
P j
Analys.is of this incident is co= plicated by the f.tilu.-e of the Sequence of a
Events >'.onitor to leg real time correctly. At the time of the W p=p trip, I
an error of s30 minutes occurred.
I Attached are system paraneter curves ;roduced frca reactimeter data.
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FIELD OPERATIO!:3 SITE IECI:.D( RENET To Fcr Actie:
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Nuclear Se-vice Suppert Enrineer W. $ i.t ke j
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Action Requested:
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G. E. Kulynych Wudlear Service Support Engineer E. G. Vard G. M. Olds
- a. T. Feto=er MMOR LIMITS N. S. E= trey J. McF6rland W LIMITS C. C. Plunkett - Centract Admin.
Centred Engineering Files gg g, E. V. DeCarli - Quality Assurance
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n VENDOR P.O. NO.
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EQUlf CODE / LEVEL /D ATE C4 LEVEL 04 SPEC NO.
1 SyE ENGINEER /
EARLY START DATE ACTUAL START DATE REQ'D CSEP.CAIE Css FI.c b.., J/ J.D. Phi nne r TITLE t VAx. 30 SP ACE SI Iess of W Incident (5/d/73) t DESCRIPTION OF PROBLEM See attach =ent.
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$l ST ATUS-ACIl0M TO DATE INCLDuiNG PERSONS CONT ACTED. CCKE TMENTS IIADE. ETC.
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- 1. Con.iucted af test to establish why the Fr_ergency W p=rp did not start..
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- 2. Opened bypass around W pr p discharge v=Gres.
FURTHER ACTION REQUIRED BY GTHER THAN SITE PERSONNEL e
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Evaluste syste:s transient. (E-actimeter tape sent to Lynchburg.)
1
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RECOMMENDED ACT!DN
~
- 1. Provide positive means of sensing less of W pu=ps to initiate -
Emer6ency W flow and r.ain turbine trip. [ C u 5 +o A e,-}
2.~ Eysluste the SD! failure and correct. @S'
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2 SITE OFER llGR. M)Mf//.</EM f//8/73 145 SUPPORT ENGR. '((haTom I 3h '73 ol;3 q
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Silt sta tellAs MAmeCLE - r!LA ED ' SFB R*.
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Etttiss 51243 0 nFrcst EE18188 - Ftt.L to: Pese.e, periseeste; e-,-te aP.e set; Cent Latessey6 aereertsed Gere, me.; aeopenas. sg Assise-east g Other eers tests 424tted.
totliv er establ8eh prepened teeetettee meetled ettt appearr[ ate engtesefteg sette, perCheeleg. eed etbere as tegente$.
If field enemae se see tusetred med adatisest ese*e (over and ebeee esten! ""*- eef*1te espeedtraces) are est te le BetetteJ. rehr the I6I*
leeseg etept: las Arresee %FE. (s e todatate 'an t seq sted* te egace prootend Ser pre *ect aseeget's espeseet. med (t) Distrs%ee es leftsmaed to step b %el*w.
one towelred tot addattemel teete (poet and ebeoe screel cor3eer eereira espeeJiteree) are te be fecerted. e7Frome M ese If field a basee to let ase so ye gets meeness ter apprece2 feter e e, If Isele sheese se regenced. ese prueeere me, sty,.3aM;1 ottete field champo to. Leue paeject aseeeer. eed teeltate s.e ad ct se te. em $PR.
4 F90Jtt! HAA* Cat Ag9eose $FL eed hetees to Suleer Serende Support Engineer.
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ALL&AA LEFTICL SWPCET par.Intia Bastethose to Assereence With Precedere me. WKe444 4e; lett143 Arttee fakee See (se Support Eastemme's File Capf) hAhee "lesaaeets af fected nase asse Cosseesed.
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Sitt ortaA!! tats edancta - taptement meeeleelena Lyme Coupletten. Fils se ensema scent 2 se.~ tmae Completafe eed By.
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E erg-0604-Oe. 8eterm cesyteced 579 Es ses leet setests anypost engineer.
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CatCima;oe = FILL to: Leonamers [estreet me.g ve.Jer; ro me.
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f t0Jt C1 hs ACLE FIL1 las Frieer, Seconeote: Bucesewe Af fe. ted; Cast Caw Amtsortsed Gorge Es.t teepeastbtitte eastgeeeet. nee E(
Cent race s At t es t ed.
.O Warif f er esse 68 tek erspesse reeeleatse voet.eq ottt eptaspriate easteeertog eedre. pertheates. med ethere sa toestred.
If Iseld eneese se met eegelred and e.sitatemel easte (eset and shove scree =ametreettee Co. espeedstesee n are est ta be tecesred. taee the felleetog store set trer ee $Ft. ese Ol Diettikete as seserdeece arttt p-wwee o inn. WPl>ctCP-0$.
p If field chan seestrect*ee Ca. espeedstv.es) are to be Racerred, estess eteermal 4
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'escrirt f en or Iw t,1c-At app-nrb.stely W.0 hs e.
the **A" nalu W pura t v in c,1 due
- o toas cf r.uctica pressare. Ocquence or ever.ts as to.i m :
- 1. Lers of all cct !cnante beoster pir.ps (crerator error).
yr 14
- 2. Yain W pu: p t rip.
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- 3. Msz cr O'33 vster invertory.
by L. R.T ter;ersture sud pressure h!c,h.
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' ' 'er.c'.or trip on high pressure.
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O. E=ercency W pu=p started manually ( tuto start ecmsnd not received).
'T No cater.atic actiona did r.ot occur. The Iber6cney W pur.p did not start
'I less cf W pu=ps ard the sain turbine did r.ot t rip on loss of W pu=pa.
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- he 'deviee to ir.itiate these actions is a pressure sencor on the msin W o
1eaderi devr.strean of the W pu=p dir,,tarre enlves a >l upstrean of the W
.ine F3 renet. ation check valves.
T..e W pu=p discharge valve automatically lese.1 on W p mri trip and isolated the Ocetion cf W header that, the
"$ ~, a sensor 's located in.
The header rerained above the 800 psic cet point.
2recsura i
cich, if reached, vculd have start ed the e=ergency W pump (Main turbine trip
.etpoint is 700 psig.) A 1" bypass arour.d the W pu:p dischsrge valves is ;
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