ML19322C497
| ML19322C497 | |
| Person / Time | |
|---|---|
| Site: | Crane, Davis Besse  |
| Issue date: | 11/09/1977 |
| From: | Holsted D BABCOCK & WILCOX CO. |
| To: | |
| References | |
| TASK-TF, TASK-TMR PROB-771109, NUDOCS 8001170825 | |
| Download: ML19322C497 (13) | |
Text
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? y s77' i [jD __M J
._I P D S-210 91 5 ( 8 -7 6 )
', SITE PROE'_EM REPOET
.1G' 1/Q[
CASCOCK & WILCCX s?? e:72 d
CUS!0HEk OklGehATok L&!.
IDOC.IL. 00mi.h0.
SPR NO.
R E i. m C.
Icleio Eiisc Oc=can -
T.E.Fr_ist 10 /t /? l 13 -
620-001L
??2 0
vihDOR F.A.
NO.
PART hD./ TASS NO.
Gk0ua nG.
SEQ. 40.
5/A E/A 51/010/001 itiLE (WA1 30 CHAk&CTERS) l PRO *LEM CDATE T T-tsd % j g
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S: R02 0-io /Rea:.cr 0-it / e U
DESCRIPil0h 0F PROBLEM:
Se e att e." ~ : s.
E;-
.v fi f M I N i h } ll[O$dUW'W fp 5
f STATUS-ACTION TO DATE. INCLUDIAG PERSONS CONTACTED:
W. F Spangler (*p.b. ), J. G.
Evans (CE00) svare of probles. 3W Enginee-ing svare of proble. Meeting held in 4 b. c: 9/29/77. inE0 (KER) aware of problem. Meeting held at Is-; c:
9/30/77.
FURTHER ACT10k RECOMMENDED BY SITE PERSONNEL: 1.
BW Engineering to evaluate transient data a d dete::::ine effects c -3W supplied equip =ent.
2.
Recc= end transient category classifica ics.
3.
Provide ree--rded fellev up actics.
RESOLUTION:
yy,
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p
- c. c. W /tzu /w-l *~J Mev 7 1977 AMU 1
(.,..
5 DATE APPROYED BY DATE P.
DARED BY
_W ll ~ *f' 7 7 e
, f E WW I j
.h
& M ""' ' _fh W
l(-9-7 7 f
COST CATEGORY FIELD CHANGE REQ T.C. A. NO.
SIGNIF. DEFICIENCY A'[A gYES NO g CNORW OTHER @ CYES No g O'e-SITE CCWDLET10m REPORT:
DEYlATIONS:
G " "I 8""
"E' "D
- U 3 ESSE da ed 5 v.1, ie._77 sad 3W -156', dated H
DATE COMPLETED: 1/,g /g g
ev. I,1977, satisfy.he actica requi:-ed.o ec=,-
plet.e this proble reper
- COWPLETED BY
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DATE g
?. C. Ecuse W y 1/o/78 n1-t
=
e 8001170
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9 SHEET
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3 0
0 Descriptic: cf Proble:
SPE #372 620-001L 10/k/77 Onlo/2k/77, app-cW-*tely 1800, ':200 reduced reactor power frc= 155 to 9%
and shut dcun the tuicine
,o repair a lesh 1: -de -ad-stee= line at an inst u=ent ecanectic: between the tuicine step velves and the high pressure turbine.
A: 213h en 9/2k/77, startup W valve to OTSG #2 was closed by the stea: &
W rupture ecstrel syste: (STROS) for an as yet undeter=ined reason. (ICS flav control was en =ssual at the ti=e).
At 21:3h:hk the cperater received a lov level ala:= c #2 CTSG. Refere he couli take eer-estive actic, the stes: & feedvater rupture ecstrel syste: (S E.05) :-ipped c: Icv SG 1evel, closing the }5IV's and n=4-W isolation valves.
- 2 Aux. W pu=p started, but caly ce== up to 2600 EPM, insufficient *,o supply enoug: feedwater to steam generators. At 2136 the cperater noticed that pressu-izer level had risen to 290" (Her-=' = 200"), and =enmy tripped the reae:cr. Se felectro=stic relief' valve liftedi(appeared to ope & close 9 ti=es) and Itailed to close. iROS pressure dropped to 1600 psig.initicting Se.fety Fea-tures Actuatic: Syste=f(SFAS). Sis started high pressu e injectics, and closed.nu=erous cc tad-~nt isolatics valves, including -de pressuriter quench ta=h cocling 'd"es.
With the' electrc=stic relief valve still'open and no coM d"g to the Quench Ta V, the quench ta:h ruptu e disc ruptured, relieving vater /stea= te cct,=4-~"t. Ihe operators _ closed the electro-
- matic relief isolation valve and stabilized 303 pressure.and began a normal Icooldown. During the secuence of events,'RCS pressure vent as low as (875 pris. ?Tave vas as high as 577 F and ~aszlow as 505'F, and's stes= bubble 1 was formed in the Pl:S.
Upon entering cent =4-~nt, the folleving was noted:
1.
Se electrc=atic relief valve is still cpen, although the solencid vent to the close positics indicating the pilot er the valve is stuck.
See S?B M 1,
[
2.
Se relief frc= the ?:r. Quench Tach tore off apprcW-stely.a 10' high x 20' circu=ferential sectics of insulatics f-c= the #2 CTSG. The paint
~
frc= the then exposed areas of the stes: generator was blas,ed away.
3.
Bere is water in the catch pans c 2-1 and 2-2 reacter coolent pu=ps.
Se operators indicate that the level in the RCP cil catch tanks is hisher.
h.
SFAS closed off both COW and seal injection to the reacter coolant pu=ps.
Le operaters appare::17 re-establisned seal injectics withis the 2-=inut'e ti=e delay and the pu=ps did not trip.
1-1 and 2-2 BCP vere tripped
=anually.
D I'Y L,
g@00u MU e
~
t.
O O
h seription of Probit: - cen't.
SFR #372 620-001h 10/k/77 "Jne folledngidesign problems.centributed to this incident:
RCS High Pressure greater
'An STROS actuation does not trip the receuor.
then 2255 psig eculd probably been arcided had the reac or tripped s1=1-1.
taneously with bottling up of the OTSG's, 2.)'Jhe ope'rators have no indication th'at the electromatic relief valve is:
It toch the= apprcxi=ately 20 =inutes to ree.lize that the valve 1 lifted.
By that ti=e, RCS pressure had dropped to less than was still relieving.
1600 psi, and SFAS actuated.
A si=ilar incidence of the STROS causing the S/U FR valve to go closed 3.
happened en 9/2/77. See SFR #367.
CORRECTIVE ACTION:
1.
Repair electrc=atic relief valve.
2.
Repair p:r. quench tank rupture disc.
3.
Repair OTSG insulation.
TECo to detede cause of proble=s with fee 6 tater that caused STROS h.
i
, trip and i ele corrective action. 'TECo also censidering taking act on i to correct design problems mentioned above.
3&W Engineering should evaluate consequences of stea= i= pinging en out-5.
OTSG shell side of stes= generator shell frc= quench tank rupture.
temperature before the incident was 518 F.
A=y inspection er corrective action required should be identified by Engineer _ng.
35W Engineering aid in reviewing events that led to incident and con-6.
sequences of incident and identify further action required.
~
I CCE:=1f
h h
.' o DAVIS-3 ESSE I e
s LCSS OF W/ROS DEFEESSi)RI"A' *05 C?.A35!~'"*
(
en 9/2L/77 sList _of Cence-ns':
1.
Electrc=r.1: Relief - can rapid eye'"5 cf vr_1ve cause de= age that would result in pilot viv/ste= biniing up =echanically in "open position".
Resolution: Crosby (3 W) 2.
Startup W Va.1ve Inadve:t.,ent Closure on 1/2 Trip of SFROS - no explanatics of cause of 1/2 trip.
Resolution: 220o 3.
STRCS - when actuated caused a "less of W" to both 0:50, and auto start of stea= d-iven anz. W pu=ps. 3W Engineering s_hould pursue lo5ic of STECS syste= and its i= pact on pr% y syste=, i.e.t Loss of W (SFES initiation)'
.? should trip reactor!).
Resolution:' 3 W
~
h.
Fuel Asse611es/ Pins -
- a., Exceeded fuel,in ec=pression li=itt, and rapid depressuri:stion,
- b. i. Flashing stes:n in core due to lov RCS pressure high te=perature during blevdown.
c.
CICo requested to analyze ROS ss=ples for failed fuel, however, =ay not be detectable until hestup, d.
Fuel Assedly Lift Forces - 2 phase fluid, h ROF's were :
'ng during transient, ROS te=p. grer ter than 500 F (lift te=p nc-a conditions ).
Resolution: 13EL 5.
RCS -
a.
Rcpid depressurization.
b.
Rapid cocidown (exceeded 100*F/hr rate of change, ) RV & Pnr.
- c. 3 Formation.of1 steam pockess ;in hot less;(and core) with RCP's _ running.
i d.1 P:r. _ smater than 290.in, with' reactor ctitical.
l e.1 P:r. level greater than 32,0 in.~vith RCF's.r mM ns.
f.
Boric Acid on external pipe surfaces, RCP carings.
Resolu. ion:- B W2
'}
I g
c FRF: nit 7
9/27/77
/
W.Ah
- ene.
o o
11st er C: ee-ns - ::tituti:
6.
03G - (#2) A 05G had apprc=i=a ely 10:20 ft. insulatics blev: Off.
a.
Stress ec:ditic:s in shell - 500 - 550 7 stea= i= side, e= hie:t (50-90 F) air te=p & 212? stea= 1.= pinging c Outside,
b.
30-ic Acid deposits c: 0 5G Shell.
c.
Less cf Ik' to both CTSG's - (see ite=,#3).
d.
3ciling cf A 0*:SG dry, possibly 3 CTSG also.
e.
Rapid depressuri:stic: of RCS c CTSG's.
~
f.
Differential Te=perature and Pressure cc diticas across OTSG tubes due to transient c: ROS sed Stes: Side - CTSG.
g.
Ds= age to shell ther=occuples.
Resciutic=: TIOo Resciutica: (a - f) = BW 7.
RCP's -
a.
Rapid depressurizatics, i=itiatics of SFAS.
b.
Less of Seal 1:jectic: and Seal Return for approximately 21/2 =inutes, to -hree RCP's, hth RO? r.pprox. 6 -d-utes.
CC'a' not lost during tra:sient.
c.
KPSE 3 d 'ts possibly exceeded.
d.
Operated fou-RCP's withoc seal injection and ecstrelled bleedoff line closed for approxi=ately 2 1/2 =inutes.
Resciuties: 3W 8.
RO?M's -
e..
RCPM A2 operating in stes= envirc==ent. ?cssibility of finding vater in the oil. TE0o to investigate.
b.
Air Cooler fouling due to Boric Acid e ystali:stics.
c.
Meisture 1: =ctor vindings - TIOo to re-=eggar.
Responsibility: 3 G to check with Westinghouse.
9.
CRDM's - tripped with no proble=. Total gas in solutic: at ti=e of 1 ident appre" -*te k 22 cc/hs. Sc=e gas =sy have ec=e out of selutien and ccilected in CEDM's. During cocidev c 9/26/77, CRDM Groups 1 L peed to 100% for shutdev = gin. Rois ve-e apparently :.:= in rather 'than tripped after cocl-devn.
~
Resciutics: Recc=end putting N. cve pressure 1: ?: and reventing all CRDM's 3
c text heatup. 3 G evaluatics.
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9/27/77
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I.TIIE, t9, EYE!!T(FTIOM COMPtffEH ALARll PRINTER)
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C0feENT I
'1 3 8:20 21:l:7 Main Steam Line Ino.Viv. Solenoid Trouble lin1r Trip of SFRCS - closed startup W valve.,
to #2 UmG.
j f
1
!L:3s:37
-1:30 80 2 U/U Range Ly1 Lov (setroint = 2s")
Invel van l o.6T" before 21:3 i:20; nov Icvel f
i 23.80".
RCP 2-2 Dise CLO. WR Temp III (octpoint 560.6) (T S)
CLO Temp. was 556 at 21:
f 31:20
!1:3 e sp6
-1:10 8
!1:35116
- :51 BC Pzr. Ievel III (setroint 213")
Level vna 203.1 at 21:31:20.
4
!1:35:18
- :Is9 SO SU Rango Low Level CR 2 Trip SF11CS Tr.lp.
!1:35:23
- :l:Is tei STM Iso. V1v. Closed isolation valves closed by SFRCS.
O
!1:35:25
- :Is2 BC Loop 2 IILO NR Temp Illgh (setpoint 565.3)
IILO Temp. 569.1.
!1:35:32
- :35 BC Pzr. Ievel 11I 222.5" l
!1:35
- 222 801 Out Stm Press. Iligh 1022 poig.
!1:35:51
- :16 lei W Stop Viv. Closed Closed by SFRCS.
!1:35:55
- :12 RC Pzr. Power Rif. V1v. Out Temp. liigh Electromatic Relief Viv. Lifted g
- 03 AFP Disc V1v. to 80 Open Aux. Feed Pump begins Supply of Water to 80's.
1 f
!1:36:08 a
1:36:0T 0:00 CRD Trip Confirm Reactor Tripped Martan1]y Due to III Pzr. IcVel.
!1:36!26 0:19 RPS Trip Low Pressure g
Reactor aircady tripped.
O,-
e
!1:37:17 1:10 SFAS Trip RC less than 1600 poi
!1:37:18 1:11 liigh Pressure Inj. Valves not closed 75 Valves opened by SFAS.
s
!1:37:18 1:11 Pzr. Quench Tank Out V1v. elooed.
Q Valve closed by SFAS.
%g
!1:37:19 1:12 BCP Sent Return 100. V1v. Closed.
Eh N
l 21 :37:00 1:13 RCP Seal Inj. Iso. Valve Cloned.
cra c= D c'223
!1:37:22 1:15 Letdown Iso. Viv. closed.
p{33 P
'I I
!1:37 3l 1:27 liigh Prenoure Inj. Flow Normn1
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AT NVENT( FRO!I COf flVTER I. ' 311 PRINTER)
C0ft:1!01T
~
37:Is 0,
1:33 RCP Gen 1 Inj. & Gent Return Flow Low I
1 37:l:5 1:38 BCP 1-1, 1-2, & 2-2 3rd Gen 1 Cav. Preen. liigh 1370, 1096 & 10:2 Rc3 Pienn = 1 90 pnt 3
2:08 BC !!.U. Flow Homal 130:15 338:15, 2:08' RCP 2-2 3rd Geni Cavity Prena. 822.2 l
B38:30 2:23 RCP 8eni Ret. urn Flow Normn1 B39:12:
3:05 Pzr Quench Tank Preso. Iligh 26l l
3:19i RCP 2' 2 CLO Temp. Iow Temp = 553.9 O
B39:
I I
.l:15 Containreent, Nomni Gump Pump On Rupture Dine had blown.
- 180 22 l 8
I 1:27:
liigh Preasure Inj. Turned Off I
sl:0:3 s 8
- I:2207,
6:00 HI 1 & NI 2 liigh Startup Hate Is.609 DPf1 i
sl:3:11 7:0s RCP 1-1 and 2-2 tripped I
- 5 s :l:6 18:39 Pzr. Quench Tank Normal /Ino. Viv. Open I
i 803:21 27:ls 80 1 DHCl4R in AVG Temp. 275.ls l
- 08:5s 32:l 7 Pzr. Icvel Normal I
- 12:32 36:25 BC Pzr. Avg. Lv1. Lov 152.5"-
122:56 I:6:I9 8tnrt ilPI #2 Started by operatore to help recover Pzr. Level.
l V_-!d-G"3 EEis g2==,
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4 TiltM AT EVEllT C 0!!?tEr m i 21:35:18
-0:19 SFRCS Trip Closed Hi and !!ain Steam Isolation Valveu 6
21:36:07 0:00 Reactor Trip Manual Trip 21:37:17 1:10 SFAS Trip RCS Preasuro < 1600 pai 21:37:19 1:12 RCP Seal Ret. Icol Vlv. Closed 21:37:20 1:13 RCP Seal In,). Flow Low 1:37:22 1:15 Itc MU Isolation Viv Closed 21:37:32 1:25 BCP l-1 & 2-2 Seal Ret. V1v. Closed 21:37:33 1:26 RCP 2-1 Seal Ret. Vlv. Closed 21:37:3 1:25
,itCP 1-2 Seal Ret. V1v. Closed 3
21:37:Is0 1:33 f3EAL IllJ. FIDW SEAL lliff. FIDW t-1 0165 1046 1
t-2 7856 2-1 0009
.1188 2-2 0211 21:37:l5 1:38 RCP l-13rd Seal Cavity Press.1370 RCS Pressure = 1679. lInd come down i
h flCP 1-2 3rd Sent Cavity Press. 1096 from 2259 in paat 1 min. 30 uee, 1
g ItCP 2-2 3rd Seal cavity Press. 10:2 l
( Q-21:38:15 F
2:08
- ItC HU Flow Hormal i
21:38:15 2:08 ItCP 2-2 3rd Seal Cavity Press. 822.2 1103 Pressure = 1532 l
$$)
2:13 ItCP Seal Return Iso. Viv. Opened 21:38:20 c==
I 21:38:35 bfN) 2:28 All Seal Return Valves Opened i
cza h
w='
[c=
i u
l
TI Ml?
AT IdVEllT COIifir'fml 21:38:l o 2:33 Seal Heturn Flow i
I 9
1-1 7716 gPm 1-2
.6295 gym 1
o 2-1
.8724 gin 2-2 1.986 gpm 35
'2:38 1-1 3rd Seal Cavity Press, l l 3.9 HCS Pressure = 1122 21:38:
6 i
4 1-2 3rd Seal Cavity Presa.111.9 21 39:10 3:03 BCP 2-2 Seal Het. Flow.66814 gpm O:
21:39 :12 3:05 Seal Inj. Isolution Valvea Opened 21:39: Iso 3:33 Seal In Flow 1-1 4.616 gpm l-2 4.911 gem z..
2-2 4.130 glun 2-1 la.8167 gym 21:Is0:22 1:15 Pzr. Quench Tank Hupture Disc Blew 4
r 21:10:27 1:20 HCP 2-2 Mtr. Vib. Iligh I HCS Press. = 1200 psig 4
4 dRCS Temp. = 545*F QhialapumpnearentPzr.QuenchTank O t = ' 3 ' t 7 :o
"""" 'tr 'riorea 2-
"a 2-2 noe'=
nos ere
- Soo >=28 13 g
1-2 Mtr. Power = 5244 KW HCS Temp. = SliO*F 2-1 !!Lr. Power = 18910 KW 21:!a3:lal 7:314 l-2 Mtr. Power a 1:095 KW a
l 21:1:3: 18 Talal RCP l-1 Mtr. Stop 4
I O -Y E5 T=RD
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F"
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TIItM AT EVElfc Col!!1 Ell'IS l
22:12:ls 36:07 RC flu Flow liigh Flow Itabalance Starved itCP Seal h
l Inj.
S 22:12:lls 36:07 DCP Seal Inj. Flow Iow Flow Imbalance Starved IlCP Seal Inj.
22:12:29 36:22 RCP 2-2 Seal Ret. V1v. Closed No Seal Inj. Return. Vlv. went cloued j
on idle pump.
22:12:37 36:30 RCP 1-1 Seal Ret. Vly. Closed Same 22:12:Is0 36:33 IlCP 1-1 Seal In Flow Low (Set Pt. = 3.3 Flow = 2.26 gpm gpm)
.!2 :12 :Is0 36:33 RCP 2-2 Seal In Flcw Low Flow =.50 gpm 22:13:10 37:03 IlCP 1-1 Seal Inj. Flow Normal Flow = 3.609 22:13:10 37:03 RCP 2-2 Seal Inj. Flow Normal Flow = 3.665 22:13:15 37:08_.
RCP l-13rd Seal Cavity Press.lligh(914,2) 1 I
22:15:Is0 39:33 RCP 1-1 Seal In Flow Normal (1.1:96) 8 22:15:ho 39 :33 RCP 2-2 Seal In Flow Normal (Is.3 3) 1 l
22:17:Is5 11:38 RCP 1-2 3rd Seal Cav. Press. (1239)lligh 6
22:19:10 1:3:03 RCP l-1 Seal In Flow Low (2.81s5) 10 1:3:03 IICP 2-2 Seal In Flow Low (2.003) d2:19:
i 22:22:00 %
3:5:53 RCP l-1 Seal Ret. Flow liigh Sb 8
22:22:10 h6:03,
RCP l-1 Seal Het.. Flow Normal (.6169) g g
22:22:15 55 h6:08 IICP 1-1 3rd fieal Cavity Prena (298.5) l Normal 22:22:29 fly 16:22 RCP l-1 & 2-2 Seal Return Vlv. Closed 8
=
22:22:l:5 1:6:38 RCP l-1 3rd Seal Cavity Press. 908.1 liigh C
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n
'@=
q.
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TiltM AT EVEllT C0f0fMti'13 18:08 RCP 2-2 3rd Beal Cavity Presa. 920.1 Ilidt b
22:23:15 4
6 22:25:l:5 49:38 BCP 2-2 3rd Deal Cavity Preso. 7h1.2 Honn.
l d
9 22:26:15 50:08 ItCP 2-2 3rd Seal Cavity Presa. 10014 liigi 22:26:45 50:30 RCP 2-2 3rd Deal Cavity Presa. 778.9 Norm.
22:27:15 51:08 BCP 2-2 3rd Seal cavity Preos. Iridi 1061:
22:29:45 53:38 RCP 2-2 3rd Seal Cavity Preus. Honn. 827.2 O2:3o: 11 5 ' = 3'-
nCe 8e 1 1 r e ner -
22:32:15 56:38 RCP 2-2 3rd Seal Cavity Freno. I!!di (11:3) 1 Norm (867.1:
22:33:15 57:38 III 997.7 22:31:15 58:08 6
Norm 655.6 22:35:lS 59:38 i
III 1132 15 1:00:38 22:36:
6 Norm. 862.8 22:37:15 1:01:08 III 980 22:37:l:5 1:01:38 Norm. 821a.8 22:38:15 1:01:38 6
III 998.9 22 :39 :l:5 1:02:30 GM)
Nona.810.9 22:lel:15 1:05:08 III 916.5 22:llts5 1:05:38 l
i (G
Nonn. 863.1 22:163:15 1:07:08 III 1021 22: Isis :15 1:08:08 cm Norm. 87h.7 22:15:15 g
1:09:08 III 1080 15 1:10 :38 22:l6:
4 i
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t
TIIF.
AT EVEllT C0!CO:fnil 35 1:11:38 RCP 2-2 3rd Seal Cavity Preas. Ilorin 829.8 22:l7:
i 4
Y III 983.7 22:18:15 1:12:08 4
22:19:02 1:12:55 RCP l-1 Seal Standpipe Iavel High 4
2 2 :349 :15 1:13:08 RCP 2-2 3rd Seal Cavity Press. Nom. 012.1 1
22:50:15 1:14:38 liigh 1113 6
Norm. 839.6 22:51:15 1:15:08 2:51:l5 1:15:38 liigh 909.14 i
Norm. 789.1 22:52:15 1:16:08 22:52:15 1:16:38 liigh 901.7 4
22:53:186 1:1.7:97 RCP l-1 Seal Standpipe I4 vel Norm.
1 51:15 1:18:09 RCP 2-2.3rd Seal Cavity Press. Nom. 814 22:
4 22:56:15 1:20:08 BCP 2-2 liigh 978.2 Norm. 81i9.2 22:57:15 1:21:08 22:59:15 1:23:08 liigh 969.5 22:59:31 1-1 Standpipe level liigh (Cd Hom.
.:2 :59:35 rp::
23:00:05 k-:-,
liigh P2?>
23:00:06 Norm.
b 23:00:18 csy It1Eh E$r-23:00:21 Norm.
23:00:28 11 1
, 23:00:30 Nom.
0 t
., /
e
COMtIEfrH1 TIIE AT EVI: fit 15 1:21:38 HCP 2-2 3rd Seal cav. Press. Noria. 752.2 4
6 23:00:
h 23:00:55 1-1 Standpipe Ievel llidt 23:00:57 1-1 8tandpipe Ievel Norinal 23:00:59 1-1 Standpipe revel flida Norrnal 23:01:07 23:01:18 111 9 :
Normal 3:01:23 23:01:!:5 1:25:38 RCP 2-2 3rd Seal Cav. Press, liigi 976.8 23:02:09 1-1 Standpipe Level 1116:
Normal 23:02:11 23:02:21 llid Nonaal 23:02:21 23:02:23 111 61 Nonnal 23:02:21:
W i O g
92 l
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