ML17263A595
| ML17263A595 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 03/30/1994 |
| From: | ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17263A585 | List:
|
| References | |
| ECA-.0, ECA-0.0, NUDOCS 9404190151 | |
| Download: ML17263A595 (44) | |
Text
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV 15 PAGE 1 of 21 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE PLANT SUPERINTENDENT EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
9404190151 940414
.'PDR
. ADOCK 05000244
'P
., PDR~I
t
EOP:
ECA-O.O LOSS OF ALL AC POWER REV 15 PAGE 2 of 21 A.
PURPOSE This procedure provides actions to respond to a loss of all AC power.
B.
ENTRY CONDITIONS/SYMPTOMS l.
ENTRY CONDITIONS This procedure may be entered directly or from:
a.
E-O, REACTOR TRIP OR SAFETY INJECTION, on the indication that neither train of AC emergency busses is energized.
2.
SYMPTOMS Which indicate a loss of all AC power are:
a.
Neither train of 480 volt AC emergency busses available.
0
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV:
15 PAGE 3 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4
NOTE:
o Steps 1 through 4 are IMMEDIATE ACTION steps.
o CSFSTs should be monitored for information only.
FR procedures should not be implemented.
o Local actions may require portable lighting and communication devices.
o Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNMT radiation is greater than 10+
R/hr.
o At least one train of.reactor trip breakers OPEN Manually trip reactor.
o Neutron flux -
DECREASING o
MRPI indicates
- ALL CONTROL AND SHUTDOWN RODS ON BOTTOM 2
Verify MSIVs CLOSED Manually close MSIVs.
EOP:
ECA-O.O LOSS OF ALL AC POWER REV 15 PAGE 4 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED O
3 Check If RCS Is Isolated:
a.
PRZR PORVs CLOSED
- a. IF PRZR pressure less than 2335 psig, THEN manually close PORVs.
- b. Verify RCS isolation valves closed:
- 1) Place letdown orifice valve switches to CLOSE
~ AOV-200A
~ AOV-200B
~ AOV-202
- 2) Place letdown isolation valve switches to CLOSE
~ AOV-371
~ AOV-427
- 3) Place excess letdown isolation valve switch to CLOSE (AOV-310)
0
EOP:
ECA-O.O LOSS OF ALL AC POWER REV:
15 PAGE 5 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED O
4 Verify Adequate TDAFW Flow:
- a. Verify TDAFW pump RUNNING a.
Perform the following:
l) Verify governor valve, V-3652, latched.
IF governor valve tripped, THEN dispatch AO to locally reset valve.
- 2) Manually or locally open at least one TDAFW pump steam supply valve.
~ MOV-3505A
~ MOV-3504A
- b. Verify TDAFW pump flow -
GREATER THAN 200 GPM
- b. Verify proper TDAFW valve alignment:
l) TDAFW pump discharge valve (MOV-3996) open.
- 2) Intact S/G TDAFW pump flow control valves open.
IF NOT, THEN manually align valves as necessary.
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV:
15 PAGE 6 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
o Conditions should be evaluated for Site Contingency Reporting (Refer to EPIP-1.0, GINNA STATION EVENT EVALUATION AND CLASSIFICATION).
o
.AO should increase surveillance of TDAFW pump until AC power is restored.
5 Try To Restore Power to Any Train Of AC Emergency Busses:
- a. Verify emergency D/G aligned for unit operation o
Mode switch in UNIT o
Voltage control selector in AUTO
- b. Reset and start available emergency D/Gs
- ANY D/G RUNNING
- c. Verify adequate D/G cooling o
Bus 17 and/or Bus 18 ENERGIZED o
One SW Pump running for each running D/G
- d. Verify at least one train of AC emergency busses ENERGIZED
~ Bus 14 and Bus 18
~ Bus 16 and Bus 17
- e. Return to procedure and step in effect
- a. Manually align switches on rear of MCB.
- b. Dispatch AO to locally start emergency D/Gs.
IF no emergency D/G available, THEN perform the following:
- 1) Direct AO to attempt to restore emergency D/G (Refer to ER-D/G.l, RESTORING D/G) 2)
Go to Step 6.
- c. Manually energize busses and start SW Pumps as necessary.
IF adequate cooling can NOT be supplied to a running D/G, THEN trip affected D/G.
(Refer to ER-D/G.2, Alternate Cooling for Emergency D/Gs).
- d. Manually energize AC emergency busses.
IF at least one train of AC emergency busses can NOT be energized, THEN go to Step 6.
P~
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV:
15 PAGE 7 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- x * * * * * * *
- CAUTION o
WHEN POWER IS RESTORED TO ANY TRAIN OF AC EMERGENCY BUSSES, RECOVERY ACTIONS SHOULD CONTINUE STARTING WITH STEP 24.
o IF AN SI SIGNAL EXISTS OR IF AN SI SIGNAL IS ACTUATED DURING THIS PROCEDURE, IT SHOULD BE RESET TO PERMIT MANUAL LOADING OF EQUIPMENT ON AN AC EMERGENCY BUS.
6 Establish The Following Equipment Alignment:
- a. Pull stop AC emergency bus loads
~ RHR pumps
~
CNMT RECIRC fans
~ CNMT spray pumps
~ SI pumps
~
CCW pumps
~ Charging pumps
~ MDAFW pumps
- b. Evaluate non-vital loads (Refer to Attachment NON-VITAL)
- c. Place non-running SW pump switches to STOP, then return to AUTO
- d. Place switches'or
'SI pump suction from BAST to CLOSE
~ MOV-826A
~ MOV-826B
~ MOV-826C
~ MOV-826D e.
Place switch for MOV-313, RCP seal return isolation valve, to CLOSE
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV:
15 PAGE 8 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 7 Try To Restore Offsite Power:
- a. 'Consult Power Control to determine if either normal offsite power supply
- AVAILABLE o
12B transformer via breaker 76702
-OR-o 12A transformer via breaker 75112
- a. IF normal offsite power supply NOT readily available, THEN perform the following:
- 1) Evaluate the following temporary power supplies and direct personnel to perform desired procedures:
o Security D/G to power an IA air compressor (Refer to ER-ELEC.5, SECURITY DIESEL FEED TO BUS 13)
~
o TSC D/G to power a
charging pump (Refer to ER-ELEC.4, TSC D/G FEED TO BUS 16 TO SUPPLY CHARGING PUMP).
- b. Reset SI, if necessary cd Restore offsite power (Refer to ER-ELEC.l, RESTORATION OF OFFSITE POWER) o Main transformer backfeed for long term concerns (Refer to ER-ELEC.3, EMERGENCY OFFSITE BACKFEED VIA UNIT AUX TRANSFORMER).
2)
Go to Step 8.
EOP:
ECA-O.O LOSS OF ALL AC POWER REV 15 PAGE 9 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 8 Dispatch AO to Locally Isolate RCP Seals And BASTs (Refer to ATTACHMENT RCS ISOLATION) 9 Isolate Makeup And'eject From Hotwell To CST By Placing Hotwell Level Controller (LC-107) In Manual AT 504 IF valves can NOT be manually
- closed, THEN dispatch AO to locally isolate makeup and reject lines as necessary.
~ Makeup isolation V-4058
~ Rej ect isolation V-4055 10 Check S/G Status:
a.
MFW flow control valves CLOSED
~ MFW regulating valves
~ MFW bypass valves b.
S/G blowdown and sample valves CLOSED Manually close valves.
IF valves can NOT be manually
- closed, THEN dispatch AO to locally isolate the affected flow path.
'E 0
I
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV 15 PAGE 10 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION A FAULTED OR RUPTURED S/G THAT IS ISOLATED SHOULD REMAIN ISOLATED.
STEAM SUPPLY TO THE TDAFW PUMP MUST BE MAINTAINED FROM AT LEAST ONE S/G.
11 Check If S/G Secondary Side Is Intact:
o Pressure in both S/Gs STABLE OR INCREASING o
E'ressure in both S/Gs GREATER THAN 100 PSIG Perform the following:
- a. IF any S/G pressure decreasing in an uncontrolled manner OR completely depressurized, THEN isolate faulted S/G unless needed for RCS cooldown:
- 1) Close faulted S/G MDAFW pump discharge valve.
~ S/G A, MOV-4007
~ S/G B, MOV-4008
- 2) Close faulted S/G TDAFW flow control valve.
~ S/G A, AOV-4297
~ S/G B, AOV-4298
- 3) Verify faulted S/G ARV controller in MANUALwith output at 0%:
~ S/G A, AOV-3411
~ S/G B, AOV-3410
- 4) Pull stop faulted S/G TDAFW pump steam supply valve.
~ S/G A, MOV-3505A
~ S/G B, MOV-3504A IF valves can NOT be closed
- manually, THEN dispatch AO to locally close valves, as necessary, to isolate flow.
- b. Dispatch AO to complete faulted S/G isolation (Refer to Attachment FAULTED S/G).
EOP:
ECA-O.O T!TLE:
LOSS OF ALL AC POWER REV 15 PAGE ll of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 12 Check If S/G Tubes Are Intact:
o Dispatch HP tech or AO to locally check steamline radiation NORMAL Try to identify ruptured S/G.
Continue with Step 13.
WHEN ruptured S/G identi,fied, THEN perform the following:
- a. Isolate ruptured S/G unless needed for RCS cooldown:
- 1) Close ruptured S/G MDAFW pump discharge valve.
~ S/G A, MOV-4007
~ S/G B, MOV-4008
- 2) Pull stop ruptured S/G MDAFW pump.
- 3) Close ruptured S/G TDAFW flow control valve
~ S/G A, AOV-4297
~ S/G B, AOV-4298 4)
WHEN S/G pressure less than 1050 psig, THEN verify ruptured S/G ARV closed.
~ S/G A, AOV-3411
~ S/G B,'OV-3410
- 5) Pull stop ruptured S/G TDAFW pump steam supply valve.
~ S/G A, MOV-3505A
~ S/G B, MOV-3504A IF valves can NOT be closed
- manually, THEN dispatch AO to locally close valves, as necessary, to isolate flow.
- b. Dispatch AO to complete ruptured S/G isolation (Refer to Attachment RUPTURED S/G).
EOP:
ECA-O.O LOSS OF ALL AC POWER REV:
15 PAGE 12 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
TDAFW pump flow control valves fail open on loss of IA.
- 13 Check Xntact S/G Levels:
a.
Narrow range level GREATER THAN 5%
[25% adverse CNMT]
- a. Maintain maximum AFW flow until narrow range level greater than 5%
[25% adverse CNMT) in at least one S/G.
~ S/G A, AOV-4297
~ S/G B, AOV-4298
- c. Control AFW flow to maintain narrow range level between 17%
[25% adverse CNMT] and 50%
- c. IF narrow range level in any intact S/G continues to increase in an uncontrolled manner, THEN return to Step 12.
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV 15 PAGE 13 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE: If the loss of power is expected to continue beyond 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, then degassing of main generator should commence as soon as personnel become available (Refer to Attachment GEN DEGAS).
14 Check DC Bus Loads:
- a. Pull stop all large non-essential DC loads o
MFV pump DC oil pumps o
WHEN turbine is stopped, THEN stop turbine DC lube oil pump (within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />) o Evaluate other DC loads (Refer to Attachment DC LOADS) b.
Check DC bus voltage GREATER THAN 105 VOLTS DC
~ Bus A
~ Bus B
- b. IF either DC bus less than 105 volts DC, THEN refer to ER-ELEC.2, RECOVERY FROM LOSS OF A or B DC BUS.
- c. Direct electricians to locally monitor DC power supply
- d. Dispatch personnel with DC panel key to deenergize CNMT emergency lights (DC panel turbine building basement west, switch
¹2)
EOI" ECA-O.O TITLE:
LOSS OF ALL AC POWER REV:
15 PAGE 14 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION WHEN POWER IS RESTORED TO ANY TRAIN OF AC EMERGENCY BUSSES, RECOVERY ACTIONS SHOULD CONTINUE STARTING WITH STEP 24.
15 Check CST Level GREATER THAN 5 FEET Switch to alternate AFW pump suction supply.
(Refer to ER-AFW.l, ALTERNATE WATER SUPPLY TO AFW PUMPS).
y'
EOP ECA-O.O LOSS OF ALL AC POWER REV:
15 PAGE 15 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
S/G PRESSURES SHOULD BE MAINTAINED GREATER THAN 200 PSIG TO PREVENT INJECTION OF SI ACCUM NITROGEN INTO THE RCS.
o S/G NARROW RANGE LEVEL SHOULD BE MAINTAINED GREATER THAN 5%
[25% ADVERSE CNMT] IN AT LEAST ONE INTACT S/G.
IF LEVEL CANNOT BE MAINTAINED, S/G DEPRESSURIZATION SHOULD BE STOPPED UNTIL LEVEL IS RESTORED IN AT LEAST ONE S/G.
NOTE:
o The S/Gs should be depressurized at maximum rate to minimize RCS inventory loss.
o PRZR level may be lost and reactor vessel upper head voiding may
'ccur due to depressurization of S/Gs.
Depressurization should not be stopped to prevent these occurrences.
o S/G ARV nitrogen pressure should be monitored and nitrogen supply bottles changed as necessary.
16 Initiate Depressurization Of Intact S/Gs To 300 PSIG:
a.
Check S/G narrow range levels GREATER THAN 17%
[25% adverse CNMT] IN AT LEAST ONE S/G
- b. Manually dump steam from intact S/Gs at maximum rate using S/G ARVs a.
Perform the following:
- 1) Maintain maximum AFW flow until narrow range level greater than 17%
[25% adverse CNMT] in at least one S/G.
- 2) Continue with Step 17.
WHEN narrow range level greater than 17%
[25% adverse CNMT]
in at least one S/G, THEN do Steps 16b and 17.
- b. Locally dump steam from intact S/Gs at maximum rate using S/G ARV.
I
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV 15 PAGE 16 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Adverse CNMT conditions or loss of forced air cooling may result in failure of NIS detectors.
17 Check Reactor Subcritical:
a; Verify source range detector N ENERGIZED
- a. Dispatch personnel with relay rack key to turn off 125 VDC power switches in REACTOR PROTECTION racks RLTR-1 and RLTR-2 to deenergize source range block relays.
- b. Monitor Reactor power:
o Intermediate
- range, N-35 STABLE OR DECREASING
o Source
- range, N-31 STABLE OR DECREASING NOTE:
Depressurization of S/Gs will result in a SI actuation.
SI should be reset to permit manual loading of equipment on emergency busses.
18 Check SI Signal Status:
a.
Any SI annunciator
- LIT a.
Go to Step 22.
WHEN SI actuated, THEN do Steps
- 18b, 19, 20 and 21.
- b. Reset SI
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV 15 PAGE 17 of 21 STEP.
ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 19 Verify CI And CVI:
a.
CI and CVI annunciators
- LIT
~ Annunciator A-26, CNMT ISOLATION
~ Annunciator A-25, CONTAINMENT VENTILATION ISOLATION a.
Depress manual CI pushbutton.
- b. Verify,CI and CVI valve status lights
- BRIGHT c.
CNMT RECIRC fan coolers SW outlet valve status lights BRIGHT
- b. Manually close CI and CVI valves.
IF valves can NOT be
- closed, THEN dispatch AO to locally close valves (Refer to Attachment CI/CVI) ~
- c. Dispatch AO to locally fail open valves.
~ AOV-4561
~ AOV-4562 20 Check If S/G Depressurization Should Be Stopped:
a.
Check RCS cold leg temperatures GREATER THAN 315'F a.
Perform the following:
- 1) Control S/G ARVs to stop S/G depressurization.
2)
Go to Step 21.
b.
Check S/G pressures
- LESS THAN 300 PSIG
- c. Manually control S/G ARVs to maintain S/G pressures at 300 psig
- b. Continue with Step 21.
WHEN S/G pressure decreases to less than 300 psig, THEN do Step 20c.
- c. Locally control S/G ARVs to maintain S/G pressures at 300 psig.
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV:
15 PAGE 18 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 21 Check CNMT Pressure HAS REMAINED LESS THAN 28 PSIG o
Annunciator A-27, CNMT SPRAY-EXTINGUISHED o
CNMT pressure indicators LESS THAN 28 PSIG IF CNMT pressure is less than 28 psig,THEN perform the following:
- a. Reset CNMT spray.
IF NOT, THEN continue with step 22.
WHEN CNMT pressure less than 28 psig, THEN place CNMT spray pump discharge valve switches to CLOSE.
22 Check CNMT Radiation LESS THAN 100 R/HR (R-29 and R-30)
Dispatch AO to locally close following valves, as necessary:
~ MDAFW pump discharge valves
~ MOV-813 and MOV-814, CCW to and from CNMT 23 Check If AC Emergency Power Is Restored AT LEAST ONE TRAIN OF AC EMERGENCY BUSSES ENERGIZED Continue to control RCS conditions and monitor plant status:
a.
Check status of desired actions:
~ Bus 14 and Bus 18
~ Bus 16 and Bus 17 o
AC power restoration o
RCP seal isolation o
DC power supply
- b. Return to Step 11.
EOP:
ECA-O.O LOSS OF ALL AC POWER REV 15 PAGE 19 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 24 Manually Control S/G ARVs To Stabilize S/G Pressures Locally control S/G ARVs.
NOTE:
SW isolation may occur when power is restored to AC emergency busses.
25 Verify SW System Operation:
a.
Check normal power available to SW pumps o
Bus 17 normal feed breaker-CLOSED
-OR-o Bus 18 normal feed breaker CLOSED
- a. IF both D/Gs operating, THEN ensure one SW pump running for each D/G.
IF only one D/G operating, THEN perform the following:
- 1) Ensure at least one SW pump running.
- 2) Manually perform SW isolation.
3)
Go to Step 26.
- b. Verify two SW pumps
- RUNNING
- b. IF normal power available',
THEN manually start SW pumps as necessary.
IF adequate cooling-can NOT be supplied to a running D/G, THEN trip affected D/G and refer to ER-D/G.2.
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV:
15 PAGE 20 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION THE LOADS PLACED, ON THE ENERGIZED AC EMERGENCY BUS SHOULD NOT EXCEED THE CAPACITY OF THE POWER SOURCE.
26 Verify Following Equipment Loaded On Available AC Emergency Busses:
o 480 volt MCCs ENERGIZED Manually load equipment as power supply permits.
~ MCC C from Bus 14
.~ MCC D from Bus 16 o
Verify instrument busses ENERGIZED
~ Bus A from MCC C (A battery)
~ Bus B from MCC C
~ Bus C from MCC D (B battery) o Dispatch personnel to verify proper operation of battery chargers
EOP:
ECA-O.O LOSS OF ALL AC POWER REV 15 PAGE 21 of 21 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 27 Select Recovery Procedure:
a.
Check RCS subcooling based on core exit T/Cs GREATER THAN O'F USING FIGURE MIN SUBCOOLING b.
Check PRZR level GREATER THAN 5%
[30% adverse CNMT]
c.
Check SI annunciators EXTINGUISHED
~ D-19, PRESSURIZER LO PRESS 1750 PSIG
~ D-21, STEAM LINE LOOP A LO LO PRESS 514 PSIG
~ D-22, STEAM LINE LOOP B LO LO PRESS 514 PSIG
~ D-28, CONTAINMENT PRESSURE 4 PSIG a.
Go to ECA-0.2, LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED, Step l.
b.
Go to ECA-0.2, LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED, Step 1.
- c. IF SI signal is present and was NOT previously reset, THEN go to ECA-0.2, LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED, Step 1.
d.
Go to ECA-0.1, LOSS OF ALL AC POWER RECOVERY WITHOUT SI REQUIRED, Step 1
-END-
EOP:
ECA-O.O LOSS OF ALL AC POWER REV 15 PAGE 1 of 1 ECA-O.O APPENDIX LIST TITLE PAGES 1)
FIGURE MIN SUBCOOLING 2)
ATTACHMENT DC LOADS 3)
ATTACHMENT FAULTED S/G 4)
ATTACHMENT RUPTURED S/G 5)
ATTACHMENT CI/CVI 6)
ATTACHMENT NONVITAL 7)
ATTACHMENT GEN DEGAS 8)
ATTACHMENT RCS ISOLATION
EOP:
ECA-O.O TITLE:
LOSS OF ALL AC POWER REV:
15 PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE:
Subcooling Margin = Saturation Temperature From Figure Below [-] Core Exit T/C Indication RC 2500
. 2400 2300 2200 2100 2000 1900 1800 1700 1600 1500 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0
S PRESSURE (PSIG)
RCS PRESSURE INCREMENTS 20 PSIG SUBCOOLED REG ION ADVERS E CNHT NORMAL CNMT INADEQUATE SUBCOOLING REGION TEMPERATURE INCREMENTS 10'F 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('F)
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV0 9
'AGE 1 of 7 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER fg RESPONSIBLE AGER EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
k
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV 9
PAGE 2 of 7 A.
PURPOSE This procedure provides actions to use engineered safeguards systems to recover plant conditions following restoration of AC emergency power.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from:
a.
ECA-O.O, LOSS OF ALL AC POWER, when AC emergency power is restored and SI is required.
b.
ECA-0.1, LOSS OF ALL AC POWER RECOVERY WITHOUT SI REQUIRED, if SI is required.
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV 9
PAGE 3 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
o CSFSTs should be monitored for information only.
FR procedures should not be implemented prior to completion of Step 7.
o Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNMT radiation is greater than 10+
R/hr.
1 Check RCP CCW Isolation Status:
a; CCW pumps BOTH PUMPS OFF b.
~ MOV-759A
~ MOV-759B a.
Go to Step 2.
- b. Manually close valves as necessary:
o RCP CCW thermal barrier outlet valves
~ AOV-754A
~ AOV-754B
~ MOV-749A
~ MOV-749B 2 Check RWST Level GREATER THAN 284 Go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step l.
l l
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
9 PAGE 4 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
SI actuation to establish safeguards valve alignment is not recommended.
3 Manually Align SI And RHR Pumps To Establish SI Injection:
a.
SI pump suction valves from RWST OPEN
~ MOV-825A
~ MOV-825B a.
Ensure at least one SI pump suction valve from RWST open.
~ MOV-825A
~ MOV-825B
- b. SI pump suction valves from BASTs -
CLOSED
~ MOV-826A
~ MOV-826B
~ MOV-826C
~ MOV-826D
- b. Ensure at least one valve in each SI pump suction line from BASTs closed.
~ MOV-826A or MOV-826B
~ MOV-826C or MOV-826D
- c. Verify SI pump C discharge valves OPEN
~ MOV-871A
~ MOV-871B
- c. Manually open valves as necessary.
d.
RHR pump discharge to Rx vessel deluge OPEN
~ MOV-852A
~ MOV-852B d.
Ensure at least one deluge valve open.
~ MOV-852A
~ MOV-852B
EOP:
ECA-0 '
LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV' PAGE 5 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION THE LOADS PLACED ON THE ENERGIZED AC EMERGENCY BUS SHOULD NOT EXCEED THE CAPACITY OF THE POWER SOURCES 4 Manually Load Following Safeguards Equipment On AC Emergency Bus:
- a. Start all SI pumps
- a. Perform the following:
- 1) Start available SI pumps.
o IF SI pump A NOT available, THEN ensure MOV-871B closed.
o IF SI pump B NOT available, THEN ensure MOV-871A closed.
b.
Check RCS pressure:
o Pressure
- GREATER THAN 250 psig
[465 psig adverse CNMT]
o Pressure
- STABLE OR INCREASING
- b. Manually start both RHR pumps and go to Step 4d.
- c. Place RHR pump switches in AUTO
- d. Start all available CNMT RECIRC fans
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
9 PAGE 6 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
IF CST LEVEL DECREASES TO LESS THAN 5 FEET, THEN ALTERNATE WATER SOURCES FOR AFW PUMPS WILL BE NECESSARY (REFER TO ER-AFW.1, ALTERNATE WATER SUPPLY TO AFW PUMPS).
o IF S/G NR LEVEL DECREASES TO LESS THAN 5S
[25% ADVERSE CNMT] AND FEED FLOW IS LESS THAN 200
- GPM, THEN THE MDAFW PUMPS SHOULD BE MANUALLYLOADED ON AC EMERGENCY BUS TO SUPPLY WATER TO THE S/G(S).
NOTE' If MDAFW pump operation is not required, pump switches should be maintained in PULL-STOP to prevent automatic start.
o TDAFW pump flow control valves fail open on loss of IA.
5 Monitor Intact S/G Levels:
- a. Narrow range level
- GREATER THAN 5$
[25% adverse CNMT]
- a. Maintain total feed flow greater than 200 gpm until narrow range level greater than 5%
[25%
adverse CNMT] in at least one S/G.
IF feed flow less than 200 gpm, THEN perform the following:
- 1) Verify MDAFW pump discharge valve to intact S/G(s) open.
- b. Control feed flow to maintain narrow range level between 17%
[25% adverse CNMT] and 50$
~ S/G A, MOV-4007
~ S/G B, MOV-4008
- 2) Manually start MDAFW pumps as necessary (228 KW).
EOP:
ECA-0.2 T1TLE:
LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
9 PAGE 7 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6 Place CNMT Spray Pumps In AUTO 7 Check RCP Seal Injection Needle Valves CLOSED
~ V-300A
~ V-300B Locally close valves before starting charging pump.
NOTE:
FR procedures may now.be implemented as necessary.
8 Go to E-1, LOSS OF REACTOR OR SECONDARY COOLANT, Step 1
-END-
~i<+
EOP:
ECA-0. 2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
9 PAGE 1 of 1 ECA-0.2 APPENDIX LIST TITLE PAGES 1)
ATTACHMENT SEAL COOLING
C
~ ~ '4