ML20204J865
Text
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s JUN 0 31988 NUMBER TTTU REY. ISSUE /DATE ECA 3.1 EGTR WITH LOSS OF REACTOR COOLANT.
Rev. 3 SUBCOOLED RECOVERY DESIRED A.
PURPOSE
'!his procedure provides actions to cooldown and depressurire the RCS to cold shutdown conditions while minimizing loss of RCS inventory and voiding in the RCS.
B, SYMPTOMS OR ENTRY CONDITIONS This precedure is entered from:
1.
E 3, STEAM GENERATOR WBE RUPTURE, Step 3, if a ruptured SG can nat be isolated from any intact SO, 2.
E 3, STEAM GENERATOR TUBE RUMURE, Step 5, if PRZR PORY can not be isolated by closing its block valve.
3.
E 3, STEAM GENERATOR WBE RUMURE, Step 11, if SO pressure is less than 500 PSIO.
4.
E 3, STEA M GENERATOR TUBE RUPTURE, Step 12, if no intact 50 is available foe RCS cooldown.
I 5.
E 3, STEAM GENERATOR TUBE RUNURE, Step 13, if a ruptured 50 pressure continues to decrease following RCS cooldown.
{
6.
E 3. STEAM GENERATOR TUBE RUPTURE, Step 14, if RCS subcooling is less than required.
7.
E 3, STEAM GENERATOR *IVBE RUPTURE, Step 17, if RCS pressure does not increase after closing PRZR PORY and block valve.
4 8.
E 3, STEAM GENERATOR TUBE RUPTURE, Step 18 ECA 3.3, SGTR WmlOUT PRESSURIZER PRESSURE CONTROL, Step 7 if Si can no: be terminated.
9.
E 3, STEAM GENERATOR TUBE RUP1VRE, Step 23, ECA 3.3, SGTR WmiOUT PRESSURIZER PRESSURE CONTROL, Step 9, if SI flow is required.
10.
ES 3.1 POST SGTR COOLDOWN USIFU 44C1'alLL, Step 5, ES 3.2, POST SGTR COOLDOWN USILG BI OW'.OWN. Step 5 and Step 16.
ES 3.3, POST SG1R COCLDOWN USING S T Qi DUMP, Step 5 and St::p 16, if a nonruptured SG is not availabk for RCS cceswn.
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P 8810250271 001007 Page 1 of 26
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DR ADOCK 0500 3
JUN 0 3198c NUhBER TT!1E REY. ISSUE /DATE E C A.3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION /EXPECIED RESPONSE RESPONSE NOT OBTAINED F
7 CAUTON:
o IF OFF SITE POWER IS LOST AFTER Si RESET, bfANUAL ACTION AfAY BE REQUIRED TO START SAFEGUARDS EQUIPbfENT.
o IF CONTROL SWITCH FOR ANY SHUTDOWN CHARGING PUbfP WAS TAKEN TO THE TRIP POSITION, THE PUbfP(S) bfAY AUTO START WHEN BOTH Si WL RELAYS ARE RESET.
o IF RWST LEVEL DECREASES TO LESS THAN 130,000 GALLONS, THE SI SYSTEbf SHOULD BE AL1GNED FOR RHR RECIRCULATION USING ES 1J, TRANSFER TO RHR RECIRCULATION.
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NOTE:
o FOIDOUT PAGE SHOULD BE OPEN.
o IN THE EVENT A SGTR AND A LEAK TO ATbf0 SPHERE OCCUR IN THE SAbfE STEAbi GENERATOR AND RCS PRESSURE IS WITHIN 400 PSIG OF SG PRESSURE THE AFFECTED LOOP ISOLATION VALVES CAN BE CLOSED, PROVIDED THE SI Sf0V TO THAT LOOP IS Al2O CLOSED.
(SEE ATTACHbfENT B FOR LOOP ISOLATION PROCEDURE).
f 1
RESET SI AND CONTAINMENT ISCLA' HON:
- a. Check containment pressur:-
- a. Perform the following:
i LESS THAN 5 PSIG
- 2. Reser SI WL Relays.
- 3. IE charging pump control switch (es; are EOlin TPO, l
'I13EN restore low disch4rp pressure auto stan for shutdown charging pump (s) by taking pump control switch (es) to the "Trip" position then releasing switch (es) to tr.e "Auto" position.
- 4. QQ IQ Step 2.
i
- b. Reset Si and containment isolation (SEE OPPOSITE PAGE) i Page 2 of 26 t
JUN 0 31o88 O
NUMBER TTH E REV. ISSLTJDATE E C A 3.1 SGTR WTI'H LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 2
CHECK CONTAINMENT START ONECONTAINMENT INSTRUMENT AIR PRESSURE INTRUMENT AIR COMPRESSOR GREATER THAN 118 PSIG TO ESTABLISH INSTRUMENT AIR PRESSURE.
3 VERIFY ALL AC BUSES ENERGIZED TRY TO RESTORE OFF SITE POWER BY OFF SITE POWER TO AC BUSES.
l (SEE OPPOSITE PAGE)
E OFF-SITE POWER CAN EQI BE RESTORED.
THEN LOAD THE FOLLOWING EQUIPMENT ON AC EMERGENCY BUSES:
- 1. MCC -5.
- 2. Control air compressors.
- 3. Semi vital 120 volt buses.
- 4. Closed cooling system pumps.
- 5. Battery charger I A.
- 6. One component cooling water pump.
- 7. One semce water pump for exh diesel.
- 8. E service water is used for RIIP. HX.
THEN use two service water pumps.
- 9. Start CARFANs as required to bmit containment pressure and temperature.
4 VERIFY CONTAINMENT SPRAY NOT REQUIRED:
- a. Check containment pressure -
- a. Manually initiate containment spray.
LESS THAN 40 PSIO WHEN containment aressure decreases to 35 PSIC THEN close containnent spray valves.
o n h
3 (fire main to containment spray).
WHEN car.tain'nent pressure decreases to 35 PflO.
r THEN close RH MOV-31.
Page 3 of 26
JUN 0 31989 NUMBER TTTIE REV. ISSUE /DATE I
EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED m
STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAIhTD F
7 CAUTIONt RCS PRESSURE SHOULD BE Sf0NITORE3. IF RCS PRESSURE DECREASES TO LESS THAN 40S PSIG (635 PSIG FOR ADVERSE CONTAINbfENT) THE LPSI PUbfPS AfUST BE SfANUALLY RESTARTED TO SUPPLY WATER TO THE RCS.
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5 CHECK IF LPSI PUMPS SHOULD BE STOPPED:
- a. Check RCS pressure:
- a. QQIQ Step 6.
o GREATER THAN 405 PSIG (635 PSIG FOR ADVERSE CONTAINMENT) o STABLE OR INCREASING l
t
- b. Stop LPSI pumps and ple.ce in standby 6
ISTTIATE EVALUATION OF PLAM STATUS:
i
- a. Check RMS radiation levels - NORMAL
- a. Try to identify and isolate leakage.
i o Check PAB radiation levels
- 1. Visually inspect all fluid lines in o Check CCW radition levels PAB and outside pipe trenches for leakage.
- 2. Isolate any line with leakage.
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- b. Obtain samples:
- l. Sample RCS:
a.
Check for fuel damage b, Check boron concentration -
- b. Borate RCS as necessary.
GREAT 11R THAN REQUIRED
- 2. Sample containment atmosphere l
- c. Evaluate plant equipment status Page 4 of 26 i
JUN 0 31988 NUMBER TmE REV. ISSUE /DATE EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev. 3 SUUCOOLED R'!COVERY DESIRED l
STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 7
CHECK SECONDARY INTEGRITY
- a. All SG pressures -
- a. E any SG pressure is decreasing in STABLE OR INCREASING an uncontrolled manner ASR the SG is b'QIisolated, THEN QQIQ E 2, FAULTED SG ISOLATION, Step 1.
t
- b. All SG pressures -
THEN QQ IQ E-2, FAULTED SG ISOLATION, Step 1.
F 7
CAUTION:
MONITOR DWST LEVEL. START MAKEUP TO DWST BEFORE LEVEL DECREASES TO S4,000 GALLONS.
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8 CHECK INTACT SG LSVELS:
- a. Check wide range levels -
- a. Maintain total AUX feedwater flow GREATER THAN 63 %
greater than 320 GPM until wide (67 % FOR ADVERSE range levelin at least one SG is CONTAINMENT) greater than 63 %
(67 % for adverse containment),
- b. Control AUX feedwater flow to
- b. E any SG wide range h. I continues maintain wide range levels between to increase in an uncontmded manner, 63 % and 69 %
THEN QQ IQ E-3, (67 % and 69 % for adverse SHAM GENERATOR TUBE containment)
RUI'rURE, Step 1.
Page 5 of 26
JUN 0 31988 NUMBER TTTll REV. ISSUE /DATE EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINTD NOTE:
SHUTDOWN AfARGIN SHOULD BE of0NITORED DURING RCS COOLDOWN.
9 INITIATE RCS COOLDOWN TO COLD SHU'IDOWN:
- a. Maintain cooldown rate in RCS cold legs -
LESS THAN 100' F / HR
- b. Use RHR System E in service
- c. Dump steam to the condenser
- c. Manually M locally dump steam from intact SG(s) from intact SGs using one 2 more of the following:
- 1. Atmospheric vent valve.
- 2. Terry Turbine steam sup 31y valves.
- 3. Hog Jet steam supply va ves.
E no intact SG available, IDEN perform one of the following:
o Use faulted SG.
E o E RHR system EQIin service THEN use ruptured SG.
10 CHECK RCS SUBCOOLING QQIQ STEP 22.
BASED ON CORE EXIT THERMOCOUPLES GREATER ' IRAN 32' F (SEE OPPOSITE PAGE FOR ADVERSE CONTAINMENT) l I
Page 6 of 26
JUN 0 31988 NUMBER TITIE REY. ISSUE /DATE E C A-3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION /EXPECI'ED RESPONSE RESPONSE NOT OBTAINED 11 CHECK IF SUBCOOLED RECOVERY IS APPROPRIATE:
- a. Check RWSTlevel-
- a. Refer to Figure eCA31 1 to determine GREATER THAN 115,000 expected containment sump level.
GALLONS IE containment sump levelis less than expected.
THEN QQ IQ ECA 3.2, SGTR WITH LOSS OF REACTOR COOLANT-S A*1URA*ED RECOVERY DESIRED, Step 1.
- b. Check ruptured SG wide
- b. Consult plant engineering staff to range level-determine.IE recovery should be LESS THAN 72 %
completed using ECA 3.2, (68 % FOR ADVERSE SGTR WITH LOSS OF REACTOR CONTAINMENT)
COOLANT-S A'IURA'ED RECOVERY DESIRED.
12 CHECK IF SIIS IN SERVICE:
QQIQ STEP 18.
o Check HPSI pumps -
ANY RUNNING 2
o Check charging pumps -
ANY RUNNING 13 PLACE ALL PR2R HEATER CONIROL SWITCHES IN TPO Page 7 of 26
JUN 0 31988 NUMBER TTT12 REY. ISSUE /DATE EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED r
7 CAUTION:
VOIDING MAY OCCUR IN THE RCS DURING RCS DEPRESSURIZATION. THIS Will RESULTIN A RAPIDLY INCREASING PRZR LEVEL.
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14 DEPRESSURIZE RCS TO REFILL PRZR:
- a. Use normal PRZR spray
- a. Use one PRZR PORV.
IE no PORV available, THEN use auxiliary spray,
- b. Check PRZR level-
- b. Continue with Step 15.
GREATER THAN 15 %
WHEN PRZR levelis (35 % FOR ADVERSE greater than 15 %
CONTAINMENT)
(35 % for adverse containment)
THEN do Step 14 c.
- c. Stop RCS depressurization t
l Page 8 of 26
JUN 0 31988 vm.fBER EU REV. ISSUE /DAE EC A 3.1 SGTR WITil LOSS OF REACTOR COOLANT -
Rev. 3 SUBCOOLED RECOVERY DESIRED ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED SEP r
7 CAUTION:
IF RCP SEAL COOUNG FLOW HAD PREVIOUSLY BEEN LOST, THE AFFECTED RCP(s) SHOUL.D NOT BE STARTED PRIOR TO AN ENGINEERING STATUS EVALUATION.
NOTE:
RCPs SHOULD BE RUN IN ORDER OF PRIORITY TO PROVIDE NORMAL PRZR SPRAY.
15 CliECK IF AN RCP SHOULD BE STARTED:
- a. Check allRCPs STOPPED
- b. Check RCS subcooling based on
- b. QQIQ Step 22.
GREATER DIAN 32' F (SEE OPPOSITE PAGE FOR ADVERSE CONTAINMENT)
- c. Check PRZR level -
- c. RETURN IQ Step 14.
GREATER THAN 15 %
(35 % FOR ADVERSE CONTAINMENT)
- d. Try to start an RCP:
- 1. Place a jumper across designated terminals on # 2 horizontal terminal board in upper RCP breaker cabinet:
RCP Terminal #
Wire #
1 8 to 9 Pl71P2 to Pl71P4 2
8 to 9 Pl72P2 to Pl72P4 3
8 to 9 Pl73P2 to Pl73P4 4
8 to 9 Pl74P2 to Pl74P4 l
- 2. Start oillift pump
- 3. Insure seal water and component cooling water supplied to RCP
- 4. Insure lower bearing temperature is less than 170' F
JUN 0 31988 NUMBER TTTE REV. ISSUE /DATE E C A-3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION /EXPLCTED RESPONSE RESPONSE NOT OBTALNED 15
- 7. Check open CH 'IV 240,
CH TV-334.
(seal water rerum trip valves)
- 8. Check own CC TV 1411
JUN 0 31988 NUMBER TITLE REY. ISSUE /DA1T, E C A-3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION /2XPECTED RESPONSE RESPONSE NOT OBTAINED NOTE:
o AFTER STOPPING ANY St PUMP, RCS PRESSURE SHOULD BE ALLOWED TO STABil2ZE BEFORE STOPPING ANOTHER St PUMP.
o THE CHARGING AND HPSI PUMPS SHOULD BE STOPPED ON ALTERNATE ECCS TRAINS WHEN POSSIBLE.
16 CHECK IF ONE CHARGING PUMP SHOULD BE STOPPED:
- a. Two charging pumps RUNNING
- a. QQ IQ Step 17.
- b. Determine required RCS subcooling from table below:
REQUIRED RCS SUBCOOLING (
- F )
HPSI PUMP STARJS CONTAINMENT NORMAL ADVERSE NONE RUNNING 50 228
~
ONE RUNNING 32 214 BVO RUNNING 32 213
- c. Check RCS subcooling based on core
- c. DO NOT STOP CHARGING PUMP.
exit thermocouples -
GQIQ Step 22.
GREATER THAN REQUIRED SUBCOOLING
- d. Check PRZR level-
- d. DO NOT STOP CHARGING PUMP.
GREATER TilAN 15 %
RETURN IQ Step 14 (35 % FOR ADVERSE CONTAINMENT)
- e. Stop one charging pump and place control switch in TPO Page 11 of 26 t
JUN 0 31988 NUMBER TTn2 REV. ISSUE /DATE E C A -3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBLOOLED RECOVERY DESIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAIhTD 17 CHECK IF HPSI PUMP SHOULD BE STOPPED:
- a. Two HPSI pumps - RUNNING
- a. QQ IQ Step 17 f.
- b. Determine required RCS subcooling from table below:
REQUIRED RCS SUBCOOLING (
- F )
PRESSURIZER ONE CHARGING PUMP NO CHARGING PUMP PRESSURS RUNNING RUNNING
( PSIG )
CONTAINMENT CONTAINMENT NOlBiAL ADVERSE NORMAL ADVERSE 1000 to 2000 76 127 85 139 600 to 1000 105 272 116 297 0 to 600 136 272 146 297
- c. Check RCS subcooling based on core
- c. DO NOT STOP HPSI PUMP.
exit thermocouples -
O.QIQ Step 22.
GREATER THAN REQUIRED SUBCOOLING
- d. Check PRZR level-
- d. DO NOT STOP HPSI PUMP.
OREATER THAN 15 %
RETURN IQ Step 14.
(35 % FOR ADVERSE CONTAINMENT)
- e. Stop one HPSI pumn l
l Page 12 of 26
JUN 0 31988 NUhBER EU REV. ISSUE /DAE ECA 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP l ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 17
- f. One HPSI and one charging pump -
- f. QQIQ Step 18.
RUNNING
- g. Determine required RCS subcooling from table below:
REQUIRED RCS SUBCOOLING (
- F )
PRESSURIZER PRESSURE CONTAINMENT
( PSIG )
NORMAL ADVERSE GREATER THAN 1400 32 32 1350 to 1400 105 180 1300 to 1350 172 312 1250 to 1300 206 365 1200 to 1250 244 365 1100 to 1200 285 365 LESS TRAN 1100 326 365
- h. Check RCS subcooling based on core
- c. DO NOT STOP HPSI PUMP.
exit thennocouples -
QQIQ Step 22.
GREATER THAN REQUIRED SUBCOOLING
- i. Che.:k PRZR level-
- d. DO NOT STOP HPSI PUMP.
GREATER THAN 15 %
RETUR2i1Q Step 14.
(.75 % FOR ADVERSE COSTAINMENT)
- j. S9psecond HPSIpump 18 CONTROL CHARGING FLOW TO MAINTAIN PRZR LEVEL GREATER THAN 15 %
(35 % FOR ADVERSE CONTAINMENT)
Page 13 of 26
JUN 0 31988 NUMBER Tml REV ISSUE /DATE EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED r
7 CAUTIONt IF RCP SEAL COOLING FLOW HAD PREVIOUSLY BEEN LOST, THE AFFECTED RCP(s) SHOULD NOT BE STARTED PRIOR TO AN ENGINEERING STATUS EVALUATION.
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NOTEt RCPs SHOULD BE RUN IN ORDER OF PRIORITY TO PROVIDE NORSfAL PRZR SPRAY.
19 CHECK RCP STATUS:
- a. Check RCPs -
- a. Try to start one RCP:
AT LEAST ONE RUNNING
- 1. Establish conditions for starting an RCP.-
- a. Place a jumper across designated terminals on # 2 horizontal terminal board in upper RCP breaker cabinet:
RCP Terminal #
Wire #
1 8 to 9 P171P2 to Pl71P4 2
8 to 9 Pl72P2 to Pl72P4 3
8 to 9 Pl73P2 to Pl73P4 4
8 to 9 Pl74P2 to P174P4
- b. Stan oillift pump.
- c. Insure seal water and component cooling water supplied to RCP.
d, insure lower bearing temperature is less than 170' F.
(scal water temm trip valves)
- h. Open seal water retum MOV.
- 2. Stan selected RCP, IE RCP can NQI be staned, IliES verify natural circulation (SEE ATTACHMENT A).
IE natural circulation EDI verified, IllES increase dumping steam.
JUN 0 31988 NUMBER TTTLE REY. ISSUE /DATE EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBC00 LED RECOVERY DESIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAlbED F
7 CAUTION:
VOIDING MAY OCCUR IN THE RCS DURING RCS DEPRESSUR12ATION. THIS Will RESULT IN A RAPIDLY INCREASING PRZR LEVEL.
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20 DEPRESSURIZE RCS TO MINMIZE RCS SUBCOOLING:
- a. Use normal PRZR spray
- a. Use one PRZR PORV.
IE no PORV available, THEN use auxiliary spray,
- b. Tum on PRZR heaters as necessary
- c. Depressurize RCS until either one of the following conditions is satisfied:
o PRZR level -
GREATER THAN 76 %
(69 % FOR ADVERSE CONTAINMEh"O E
I o RCS subcooling based on core exit thermocoup'les.
APPROACHING 32 F (SEE OPPOSITE PAGE FOR ADVERSE CONTAINhENT) 21 VERIFY ADEQUATE SHUTDOWN j
MARGIN:
i
- a. S:ur.ple RCS I
l
- b. Sample rophrrd W) i l
- c. Check Shutdawu margin -
- e. Borate RCS u necessary.
ADEQUATE f
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a Page 15 of 26
I JUN 0 31988 NUMBER TTT U REV. ISSUE /DATE EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED 3
STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 22 VERIFY SI FLOW NOT REQUIRED:
- a. Check RCS subcooling based on
- a. Manually operate charging core exit thermocouples -
DE SI pumps as necessary, GREATER 111AN 32' F QQIQ Step 23.
(SEE OPPOSrm PAGE FOR ADVERSE CONTAINMFNO
- b. Check PRZR level-
- b. Manually operate charging GREATER 111AN 10 %
OR SIpumps as nece<sary, (24 % FOR ADVERSE RETURN IQ Step '4.
CONTAINMENT)
Page 16 of 26
JUN 0 31988
{ NUMBER EU REV. ISSIRUDATE EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev. 3 SUBCOOLED RECOVERY DESIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINID 23 CHECK IF DIESEL GENERATORS SHOULD BE STOPPED:
- a. Ven'fy_ac emergency buses energized -
- a. Try to restore off site power to BOm TRAINS BY OFF SITE both trains.
POWER (SEE OPPOSITE PAGE) 1 BUSES 8,4 and 5 E N.QI restored, ASI2
'IllEN check the following equipement BUSES 9,6 and 7 loaded on the ac emergency buses:
l
- 1. MCC - 5.
- 2. Control air compressors, i
- 3. Semi vital 120 V buses.
- 4. Closed cooling system pumps.
- 5. Bat:ery charger I A.
{
- 6. One component cooling water pump.
)
- 7. O,1e service water pump for each d
diesel generator.
- 8. E service water is supplied to RHR heat exchangers, l
THEN use at least two service wates pumps.
- 9. Start CARFANS as required to d
limit containment pressure and temperature, j
- b. Stop any unloaded diesel j
generator and place it in s*mdby (SEE OPPOSITE PAGE) l l
24 MIhTMIZE SECONDARY SYS'11!M i
CONTAMINAT10N:
o Check ruptured SG(s) isolated o Close condenser high leveldump to DWST ( CD V 634 )
Page 17 of 26
JUN 0 31988 NUMBER TTTI.E REV. ISSUE /DATE i
ECA 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED fTEP ACTION /EXPECITD RESPONSE RESPONSE NOT OBTAINED i
25 CHECK RCP COOLING SYSEMS:
ESTABLISH NORMAL COOLING FLOW TO RCPs, o RCP CCW System flow - NORMAL IN ACCORDANCE WITH.
o RCP sealinjection flow NORMAL NOP 2.81, OPERATION OF COMPONENT COOLING SYSTEM, AM2 NOP 2.61, SEAL WARR STARTUP NORMAL OPERATION.
26 CHECK RCP SEAL RETUP.N STOP AFFECTED RCP(s).
FLOWS GREATER THAN O.2 GPM 27 CHECK SOURCE RANGE DEECTORS ENERGIZED:
- a. Check intermediate range flux -
- a. Continue witt, step 28 LESS THAN 5 x 1010 AMPS WHEN less than 5 x 10 30 AMPS, THEN do steps 27 b, e and d.
b Verify source range detectors -
- b. Manually energi:: source range l
ENERGIZED detectors.
- c. Transfer nuclear flux recorders to source range scale i
- d. Transfer SUR meters to sot'.rce range 28 SHUT DOWN UNNECESSARY PLANT EQUIPMENT 4
- a. Stop c,ne main feedwater pomp 4
- b. Stop ore condensate pump t
- c. Place standby heater dr.t!n pump in TPO 1
- d. Place running heater dnin pump in TPO 1
L Page 18 of 26
JUN 0 31988 NLStBER EU REV. ISSUE /DATE EC A 3.1 SGTR WITH I.OSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED r
7 CAUTION:
FEEDWATER FLOW SHOULD NOT BE ESTABlJSHED TO ANY RUPTURED SG WHICH IS AU,0 rAULTED UNLESS NEEDED FOR RCS COOLDOWN.
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29 CHECK RUIrTURED SG(s) WIDE REFILL RUFrTURED SG(s) TO 69 %
l RANGE LEVEL USING AUX FEEDWATER FLOW.
GREATER THAN 63 %
(67 % FOR ADVERSE IE EITHER ONE OF THE COhTAINMENT)
FOLLOWING CONDITIONS OCCURS, WEN STOP AUX FEEDWATER FLOW TO THE RUlrrURED SG(s)
UN1ESS NEEDED FOR RCS COOLDOWN:
o Ruptured SG pressure (s) decreases in an uncontrolled manner.
E t
Ruptured SG pressure (:;) increases j
o to 935 PSIG.
j I
30 CHECK IF RCPs MUST BE SHUEOWN:
I
- a. Check the following:
- a. QQIQ Step 31.
I o Nurnber 1 seal differential-LESS THAN 275 PSIG l
ca l
o Nemte.1 sealleakoff f.ow -
LESS THAN 0.2 GPM i
- b. Stop affected RCP(s)
I i
Page 19 of 26 1
JUN 0 31986 NMGER EU REV. ISSUUDAE EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED
~
l 31 CHECK IF RHR SYSniM CAN BE PLACED IN SERVICE:
- a. Check the following:
- a. GQ IQ Step 32.
o RCS te_mperature -
LESS MAN 300* F (277* F FOR ADVERSE CONTAINMENT) i o RCS pressure -
LESS THAN 300 PSIG (t 310 PSIG FOR ADVERSE CONTAINMEhT)
- b. Consult plant engineering staff to determine RHR lineup:
o RHR system in service IN ACCORDANCE WIDI NOP 2.91, RHR SYSTEM PLACING SYSTEM IN SERVICE l
l l
o RHR system in service IN ACCORDANCE WITH ES 1.3, TRANSFER TO RHR RECIRCUALTION l
32 CHECK RCS TEMPERATURE EFTURN IQ STEP 8.
LESS THAN 200' F 33 EVALUATE LONG TERM PIANT l
STATUS:
l i
L
- a. M1!ntain cold shutdown conditions
- b. Consult plart er.pneering staff END Page 20 of 26
JUN 0 31985 NUMBER TME REY. ISSLTJDATE E C A.3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED ATTACISENT A
'The folkwing conditions support or indicate natural circulation flow:
e RCS subcooling based on core exit thermocouples is greater than 32' F.
o 50 pressures are stable or decreasing.
o RCS temperature based on core exit thermocoupl:s and average temperature indications is stable or decreasing.
o RCS cold leg temperatures are at saturation temperature for SG pressures.
'\\
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Page 21 of 26
JUN 0 31988 NUMBER 1TT U REV. ISSUE /DAH ECA 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTA!hTD ATTACHMENT B When the decision has been made to isolate a loop (s) with a ruptured SG, use the following procedure.
1.
Check ruptured SG(s) isolated 2.
Stop RCP in loop (s) with ruptured SG 3.
Reset Si and containment isolation:
- a. Check containment pressure -
- a. Perform the following:
LESS THAN 5 PSIG
- 2. Reset SI WL Relays.
- 3. GQIQ Step 4.
- b. Reset SI and containment isolation (SEE OPPOSITE PACE) 4.
Close ruptured loop (s) SI MuV 5.
Check IF RCS depressurization is required:
- a. Check RCS pressure -
- a. QQIQ Step 8.
GREATER THAN RUPTURED SG(s)
PRESSURE dY 400 PS;G.
(180 PSIG FOR ADVERSE CO.VTAINMENT) 6.
Depressurim RCS to minimiza RCS to SG WJTerential pressare a Use normal PRZR spray a E letdown in senice, THEN use auxiliary spray valve 4
E letdown E.QIin service, DIEN use one PRZR PORV.
E no PORV avallable, DIEN use auxiliary spray.
Page 22 of 26
JUN 0 31988 l NG.iBER Tm.E REY. ISSUE /DATE EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACI1ON/EXPECED RESPONSE RESPONSE NOT OBTAINED ATTACHMENT B 6.
- b. Depressurize RCS until one of the following conditions is satisfied:
o PRZR level.
GREADIR UIAN 76 %
(69 % FOR ADVERSE CONTAINMENT) 2 o
RCS subcooling based on core thermocouples -
APPROACHING 32' F 7.
Check RCS to SO A P-Continue RCS r.oldown and WITHIN 400 PSIG depressurization, (180 PSIG FOR ADVERSE 4
CONTAINMENT)
within 400 PSIG (180 PSIG FOR ADVERSE CONTAINMENT),
THEN GO T.Q Step 8.
8, Close HOT and COLD Leg Loop RQlRN..TQ ECA 3.1 Step in effect.
I I<olation vaives for loop (s) with ruptured SO 9.
Close RCP seal water suppy and l
return isolatiori valves en isolated l
loop (s) 10.
Open isolated loop (s) drain header MOV 11.
Open isolated loop (s) bypass valve Page 23 of 26
JUN 0 31988 NUMBER MU REV. ISSUE /DAH EC A 3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED STEP ACTION /EXPECED RESPONSE RESPONSE NOT OBTAINED A'ITACHMENT B 12 Verify loop (s) with ruptured SG is RETURN ID ECA 3.1 Step in efrect, isolated:
o Check isolated loop (s) and isolated SG(s) pressure -
APPROXIMATELY EQUAL NOTE:
AN ISOLATED LOOP (s) MUST REMAIN ISOLATED. FURTHER RECOVERY ACTIONS MUST BE CONDUCTED AS DIRECTED BY PLANT ENGINEERING STAFF.
13 QQID E 1, LOSS OF REACTOR OR SECONDARY COOLANT, Step 1.
END I
1 l
i Page 24 of 26
JUN 0 31988 NUMBER EU REV. ISSUE /DATE E CA.3.1 SGTR WITH LOSS OF REACTOR COOLANT -
Rev.3 SUBCOOLED RECOVERY DESIRED l
l t
250 g-g-
r-g-
r T
T T -'T 7
7 7
I I
I I
I I
l l
1 l
l I
2M L
L L
L-L L
1 1
2 J
J J
l l
I I
I I
l l
1 1
1 1
I I
I l
l l
i I
I I
I I
I I
I
.I I
l l
I I
I I
200 -i-r -p - p RWST START LEVEL. u-4-4 a-a-q l
250,000 GAL g i
l i
i l
i I
I I
l l
I WST START LEVE1. 230,000 GAL i l
I I
I I
I I
I I
I l
i I
I
[
150 -L -
RWST I
I I
I LEWL I
I I
I ~ ' l I
LOCA IN CONTAJNMENT (GALLONS X 100) 1 i
f L
100
- - - - "y - F -
1 r.;-g,,
g I
-g I
7.
~
~~
5~~i~T F=i:
s _ _ -
- f. M ~ ~ N,
i j!
r---+.
A g
i i
0
^-
'- - j-
'j-r -Y_ d
{
i~ ' " ^
l I
7 '
i 1,51.752.02.252.52.753.03.253.53.764.04.25 ELEVATION OF WATDt. IN FEET l
FIGURE ECA31 1 i
CONTAINMENT SUMP LEVEL l
vs.
RwST_LEEL Page 25 of 26
JUN03 088 REV. ISSUE /DATE Rev. 3 FOLDOUT EQR ECA-3.1 PROCEDURE 1.
SJ REINITIATION CRITERIA Manually operate charging QR Si pumps as necessary, E either condition listed below occurs:
RCS subcooling based on core exit thermocouples LESS THAN 32' F.
o PRZR level - CANNOT BE MAINTAINED GREATER ' IRAN 10%
o (24% FOR ADVERSE CONTAIh3 TENT).
2.
RED PATH
SUMMARY
J SUBCRITICALLY Nuclear power greater than 5%.
a.
b.
CORE COOLING -
Core exit thermocoup!<s greater than 1200' F.
b c.
HEAT SINK -
Wide range level in all SGs less than 63%
(67% for adverse containment)
AFD total feedwater flow less than 320 GPM.
d.
IN'EGRITY -
Cold leg temperature decreases greater than 100* F in last 60 minutes AtiQ RCS cold leg temperature less than 231' F.
e.
COSTAINMENT.
Containment pressure greater than 40 PSIG.
3.
SECONDARY RG,IORITY CRI1ERIA QQ IQ E 2, FAULTED STEAM GENERATOR ISOLATION, Step 1.
unlest SG is nee &d fm RCS cooldown, E cither of the following conditions occur; Any SG h decreasing in an uncontrolled manner e
ANJ2 h.u FE been isolated.
l Any SG is complete.ly depreasurized AhD has NQT beenisolated.
4.
BJ;R BECBCULATION SWITCHOVEP CRITERION 3
QQ IQ E.4 1.3, TRANSFER TO RHR RECIRCULATION, Step 1, E RWST level decierses to less than 130.000 gallons.
( LPSI pumps may cavitate E RWST level is less than 70,000 gallons. )
5.
AM SUPPLY MAKEUP CRITERION Start makeup to DWST before level decreases to 54,000 gallons.
Page 26 of 26