ML17263A613
| ML17263A613 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 03/30/1994 |
| From: | ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17263A585 | List:
|
| References | |
| ECA-3.3, NUDOCS 9404190163 | |
| Download: ML17263A613 (64) | |
Text
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 1 of 27 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC RE EW DATE 3,3D g
PLANT S ERI TENDENT EFFECTIVE DA E CATEGORY 1.0 REVIEWED BY:
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 2 of 27 A.
PURPOSE This procedure provides actions for a SGTR with coincident loss of normal and auxiliary PRZR sprays and PORVs.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from:
a.
E-3, STEAM GENERATOR TUBE RUPTURE, when PRZR pressure control is not available.
)
~
0 V
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 3 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
o Foldout page should be open AND monitored periodically.
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 Ruptured S/G Narrow Range Level LESS THAN 674
[554 adverse CNMT]
Go to Step 8.
2 Check RCP Status AT LEAST ONE RUNNING Try to start one RCP:
- a. Establish conditions for starting RCP.
o Bus 11A and Bus 11B energized o
Refer to Attachment RCP START
- b. Start one RCP.
IF no RCP can be
- started, THEN go to Step 4.
3 Check IF Normal PRZR Spray Available:
Perform the following:
- 1) Place PRZR heater control group to PULL STOP.
- 2) Place PRZR heater backup group to OFF.
- 3) Place normal spray valve controllers to MANUAL at 0%.
b.
Go to E-3, STEAM GENERATOR TUBE
'UPTURE, Step 21 4)
Go to Step 4.
r
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 4 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4 Try To Restore PRZR PORV:
- a. Block valves
- AT LEAST ONE OPEN
~ MOV-516 for PCV-430
~ MOV-515 for PCV-431C a.
Open one block valve unless it was closed to isolate an open PORV.
If block valves can NOT be
- opened, THEN dispatch AO to locally ensure breakers to block valves closed.
b.
- c. Verify at least one PRZR PORV flow path
- AVAILABLE d.
Go to E-3, STEAM GENERATOR TUBE
- RUPTURE, Step 22
~ MOV-515, MCC C position 6C
~ MOV-516, MCC D position 6C
- b. Refer to Attachment N2 PORVS to operate PORVs.
c.
Go to Step 5.
1p s
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV'0 PAGE 5 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE: If auxiliary spray is the only means of RCS pressure
- control, THEN the 320'F hT limit between the spray line and PRZR does not apply.
5 Try To Establish Auxiliary Spray:
- a. Charging pumps
- AT LEAST ONE RUNNING a.
Perform the following:
- 1) IF CCW flow is lost to any RCP thermal barrier OR any RCP ¹1 seal outlet temperature offscale high, THEN locally isolate seal, injection to affected RCP.
~ RCP A, V-300A
~ RCP B, V-300B
- 2) Ensure HCV-142 demand at 0%.
- 3) Start charging pumps as necessary.
IF charging not available, THEN go to Step 6.
- b. Establish auxiliary spray flow:
- 1) Open auxiliary spray valve (AOV-296)
- 2) Close charging valve to loop B cold leg (AOV-294) c.
Go to E-3, STEAM GENERATOR TUBE
- RUPTURE, Step 2lb
- b. IF auxiliary spray can NOT be established, THEN go to Step 6.
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV'0 PAGE 6 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION 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).
NOTE:
TDAFW pump flow control valves fail open on loss of IA.
- 6 Monitor Intact S/G Level:
a.
Narrow range level GREATER THAN 5%
[25% adverse CNMT]
- b. Control feed flow to maintain narrow range level between 17%
[25% adverse CNMT] and 50%
- 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
~
- b. IF narrow range level in intact S/G continues to increase in an uncontrolled manner, THEN go to ECA-3.1, SGTR WITH LOSS OF REACTOR COOLANT -
SUBCOOLED RECOVERY DESIRED, Step 1.
7 Check PRZR Level GREATER THAN 54
[304 adverse CNMT]
Return to Step l.
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ECA-3.3 TlTLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 7 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 8
Check If SI Can Be Terminated:
a.
RCS subcooling based on core exit T/Cs
- GREATER THAN O' USING FIGURE MIN SUBCOOLING
- b. Secondary heat sink:
o Total feed flow to S/Gs GREATER THAN 200 GPM AVAILABLE
-OR-a.
Do NOT stop SI pumps.
Go to ECA-3.1, SGTR WITH LOSS OF REACTOR COOLANT -
SUBCOOLED RECOVERY DESIRED, Step 1.
- b. IF neither condition satisfied, THEN do NOT stop SI pumps.
Go to ECA-3.1, SGTR WITH LOSS OF REACTOR COOLANT -
SUBCOOLED RECOVERY DESIRED, Step l.
o Narrow range level in intact S/G GREATER THAN 5%
[25%
adverse CNMT]
c.
RVLIS indication o
Level (no RCPs)
GREATER THAN 68%
[73% adverse CNMT]
c.
Do NOT stop SI pumps.
Go to ECA-3.1, SGTR WITH LOSS OF REACTOR COOLANT -
SUBCOOLED RECOVERY DESIRED, Step 1.
-OR-o Fluid fraction (any RCP running)
GREATER THAN 80%
- d. Any ruptured S/G narrow range level INCREASING IN AN UNCONTROLLED MANNER OR OFFSCALE HIGH d.
Do NOT stop SI pumps.
Return to Step 2.
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 8 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 9 Stop SI Pumps and Place In AUTO
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 9 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 10 Check If Charging Flow Has Been Established:
- a. Charging pumps
- ANY RUNNING a.
Perform the following:
- 1) IF CCW flow is lost to any RCP thermal barrier OR any RCP 51 seal outlet temperature offscale high, THEN dispatch AO with key to RWST gate to close seal injection needle valve(s) to affected RCP:
~ RCP A, V-300A
~ RCP B, V-300B
- 2) Ensure HCV-142 open, demand at OS.
- b. Charging pump suction aligned to RWST:
o LCV-112B -
OPEN o
LCV-112C -
CLOSED
- b. Manually align valves as necessary.
IF LCV-112B can NOT be opened, THEN perform the following:
- 1) Verify charging pump A NOT running and place in PULL
- STOP,
- 2) Dispatch AO to locally open manual charging pump suction from RWST (V-358 located in charging pump room).
3)
WHEN V-358 open, THEN direct AO to close V-268 to isolate charging pumps B and C from VCT (V-268 located in charging pump room).
- c. Start charging pumps as necessary and adjust charging flow to restore PRZR level
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 10 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
- ll Monitor RCS Inventory:
o RCS subcooling based on core exit T/Cs GREATER THAN O' USING FIGURE MIN SUBCOOLING o
RVLIS indication o
Level (no RCPs)
GREATER THAN 68%
[73% adverse CNMTj
-OR-Perform the following:
- a. Manually operate SI pumps as necessary.
b.
Go to ECA-3.1, SGTR WITH LOSS OF REACTOR COOLANT -
SUBCOOLED RECOVERY DESIRED, Step 1.
o Fluid fraction (any RCP running)
GREATER THAN 80%
12 Verify Adequate SW Flow To CCW Hx:
- a. Verify at least two SW pumps RUNNING
- b. Verify AUX BLDG SW isolation valves OPEN
~ MOV-4615 and MOV-4734
~ MOV-4616 and MOV-4735
- a. Manually start pumps as power supply permits (258 kw per pump).
IF less than two SW pumps can be operated, THEN go to Step 20.
- c. Verify CNMT RECIRC fan annunciator C-2, HIGH TEMPERATURE ALARM -
EXTINGUISHED
1P l,)
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 11 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 13 Check If Normal CVCS Operation Can Be Established
- a. Verify IA restored:
OPEN o
IA pressure GREATER THAN 60 PSIG a.
Continue with Step 17.
WHEN IA
- restored, THEN do Steps 13 through 16.
- b. Verify instrument bus D-ENERGIZED c.
CCW pumps
- ANY RUNNING
- b. Energize MCC B.
IF MCC B NOT available, THEN perform the following:
- 1) Verify MCC A energized.
- 2) Place instrument bus D on maintenance supply.
- c. Perform the following:
- 1) IF any RCP ¹1 seal outlet temperature offscale high, THEN isolate CCW to thermal barrier of affected RCP(s).
~ RCP A, MOV-749A and MOV-759A
~ RCP B, MOV-749B and MOV-759B d., Charging pump
- ANY RUNNING
- 2) Manually start one CCW pump.
- d. Continue with Step 20.
WHEN any charging pump running, THEN do Steps 14 through 17.
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 12 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE: If PRZR level is less than 13%, letdown may be established by placing AOV-427 to OPENS 14 Establish Normal Letdown:
- a. Establish charging line flow to REGEN Hx -
GREATER THAN 20 GPM
- b. Place the following switches to CLOSE:
Letdown orifice valves (AOV-200A, AOV-200B, and AOV-202)
~ AOV-371, letdown isolation valve
~ AOV-427, loop B cold leg to REGEN Hx
- c. Place letdown controllers in MANUAL at 25% open
~ TCV-130
~ PCV-135
- d. Reset both trains of XY relays for AOV-371 and AOV-427 e.
Open AOV-371 and AOV-427 IF RCP seal return has been established, THEN establish excess letdown as follows:
o Place excess letdown divert
- valve, AOV-312, to NORMAL.
o Ensure CCW from excess letdown
- open, (AOV-745).
o Open excess letdown isolation valve AOV-310.
o Slowly open HCV-123 to maintain excess letdown temperature less than 195'F and pressure less than 100 psig.
o Adjust'harging pump speed as necessary.
, IF RCP seal return NOT established, THEN consult TSC to determine if excess letdown should be placed in service.
- f. Open letdown orifice valves as necessary
- g. Place TCV-130 in AUTO at 105'F
- h. Place PCV-135 in AUTO at 250 psig
- i. Adjust charging pump speed and HCV-142 as necessary
'E
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 13 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 15 Check VCT Makeup System:
- a. Adjust boric acid flow control valve in AUTO to 9.5 gpm
- b. Verify the following:
1)
RMW mode selector switch in AUTO
- b. Adjust controls as necessary.
2)
RMW control armed RED LIGHT LIT c.
Check VCT level:
o Level GREATER THAN 20%
-OR-o Level STABLE OR INCREASING
- c. Manually increase VCT makeup flow as follows:
- 1) Ensure BA transfer pumps and RMW pumps running.
IF NOT, THEN reset MCC C and MCC D UV lockouts as necessary.
- 2) Place RMW flow control valve HCV-111 in MANUAL.
- 3) Increase RMW flow.
II
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SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 14 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 16 Check Charging Pump Suction Aligned To VCT:
a.
VCT level GREATER THAN 20%
- a. IF VCT level can NOT be maintained greater than 5%,
THEN perform the following:
- 1) Ensure charging, pump suction aligned to RWST o
LCV-112B open o
LCV-112C closed
- b. Verify charging pumps aligned to VCT o
LCV-112C -
OPEN o
LCV-112B -
CLOSED
- 2) Continue with Step 17.
WHEN VCT level greater than 40%,
THEN do Step 16b.
- b. Manually align valves as necessary.
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV'0 PAGE 15 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 17 Check RCP Cooling:
a.
Establish normal cooling to RCPs (Refer to Attachment SEAL COOLING).
o Annunciator A-7, RCP 1A CCW RETURN HIGH TEMP, OR LOW FLOW EXTINGUISHED o
Annunciator A-15, RCP 1B CCW RETURN HIGH TEMP OR LOW FLOW EXTINGUISHED b.
Check RCP seal injection:
o Labyrinth seal D/Ps GREATER THAN 15 INCHES OF WATER
-OR-o RCP seal injection flow to each RCP GREATER THAN 6 GPM
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 16 of'7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 18 Check If Seal Return Flow Should Be Established:
- a. Verify RCP ¹1 seal outlet temperature LESS THAN 235'F
- b. Verify RCP seal outlet valves OPEN
~ AOV-270A
~ AOV-270B a.
Go to Step 19.
- b. Manually open valves as necessary.
- c. Reset both trains of XY relays for RCP seal return isolation valve MOV-313 d.
Open RCP seal return isolation valve MOV-313
- e. Verify RCP ¹1 seal leakoff flow LESS THAN 5.5 GPM
- f. Verify RCP ¹1 seal leakoff flow GREATER THAN 0.25 GPM
- d. Perform the following:
- 1) Place MOV-313 switch to OPEN.
- e. IF any RCP seal leakoff flow greater than 5.5 gpm THEN:
o Close the affected RCP seal discharge valve
~ RCP A, AOV-270A
~ RCP B, AOV-270B o
Trip the affected RCP IF both RCP seal discharge valves are shut, THEN go to Step 19.
- f. Refer to AP-RCP.1, RCP SEAL MALFUNCTION.
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 17 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 19 Equalize Charging And Letdown Flows:
- a. Verify charging pump controllers in manual
- b. Control charging and seal injection flows to equal letdown and seal leakoff flows 20 Check If Emergency D/Gs Should Be Stopped:
- a. Verify AC emergency busses energized by offsite power:
o Emergency D/G output breakers OPEN
- a. Try to restore offsite power (Refer to ER-ELEC.1, RESTORATION OF OFFSITE POWER).
o AC emergency bus voltage GREATER THAN 420 VOLTS o
AC emergency bus normal feed breakers CLOSED b.
Stop any unloaded emergency D/G and place in standby (Refer to Attachment D/G STOP) 21 Minimize Secondary System Contamination:
- a. Isolate reject from hotwell to CST:
o Place hotwell level controller (HC-107) in MANUAL at50'.
IF hotwell level increasing, THEN direct HP to sample hotwells for activity.
o Verify hotwell level STABLE
- b. Verify local actions to complete isolation of ruptured S/G (Refer to Attachment RUPTURED S/G)
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 18 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Adverse CNMT conditions or loss of forced air cooling may result in failure of NIS detectors.
22 Check If Source Range Detectors Should Be Energized:
a.
Source range channels DEENERGIZED a.
Go to Step 22e.
b.
Check intermediate range flux-EITHER CHANNEL LESS THAN 10 10 AMPS
- b. Perform the following:
- 1) IF neither intermediate range channel is decreasing, THEN initiate boration.
c.
Check the following:
o Both intermediate range channels LESS THAN 10 10 AMPS
- 2) Continue with Step 23.
WHEN flux is LESS THAN 10 amps on any operable
- channel, THEN do Steps 22c through e.
- c. Continue with Step 23.
- WHEN, either condition met, THEN do Steps 22d and e.
-OR-o Greater than 20 minutes since reactor trip
- d. Verify source range detectors ENERGIZED
- d. Manually energize source range detectors by depressing P-6 permissive defeat pushbuttons (2
of 2).
IF source ranges can NOT be
- restored, THEN refer to ER-NIS.1, SR MALFUNCTION and go to Step 22.
- e. Transfer Rk-45 recorder to one source range and one intermediate range channel
C, 0
0
~
~
0
~
PW I'
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV'0 PAGE 19 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 23 Establish Normal Shutdown Alignment:
.a.
Check condenser
- AVAILABLE
- a. Dispatch AO to perform Attachment SD-2.
- b. Perform the following:
o Open generator disconnects
~ 1G13A71
~ 9X13A73 o
Place voltage regulator to OFF o
Open turbine drain valves o
Rotate reheater steam supply controller cern to close valves o
Place reheater dump valve switches to HAND o
Stop all but one condensate pump
- c. Verify adequate Rx head cooling:
Go to Step 24.
- 2) Verify at least one control rod shroud fan RUNNING
- 2) Manually start one fan as power supply permits (45 kw)
- 3) Verify one Rx compartment cooling fan - RUNNING
- 3) Perform the following:
o Dispatch AO to reset UV relays at MCC C and MCC D.
o Manually start one fan as power supply permits (23 kw)
- d. Verify Attachment SD-1 COMPLETE
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 20 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Plant staff should decide whether to repair PRZR pressure control systems or continue with this procedure.
If PRZR pressure control is established, PRZR level should be restored to greater than 5%
[30%
adverse CNMT] and then further recovery should continue with E-3, STEAM GENERATOR TUBE RUPTURE, Step 37.
24 Check If SI ACCUMs Should Be Isolated:
a.
Check the following:
o RCS subcooling based on core exit T/Cs GREATER THAN O' USING FIGURE MIN SUBCOOLING
- a. Return to Step 11.
o RVLIS indication GREATER THAN 68%
[73% adverse CNMT]
~ MOV-841, MCC C position 12F
~ MOV-865, MCC D position 12C
- c. Close SI ACCUM discharge valves
~ MOV-841
~ MOV-865
- c. Vent any unisolated ACCUMs:
- 1) Open vent valves for unisolated SI ACCUMs ~
- d. Locally reopen breakers for MOV-841 and MOV-865
~ ACCUM A, AOV-834A
~ ACCUM B, AOV-834B
- 2) Open HCV-945.
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV'0 PAGE 21 of 27 STEP
'ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Leakage from ruptured S/G into RCS will dilute RCS boron concentration.
25 Verify Adequate Shutdown Margin
- b. Borate as necessary.
26 Maintain Required RCP Seal Injection Flow And Labyrinth Seal D/P:
o Labyrinth seal D/P to each RCP GREATER THAN 15 INCHES OF WATER Perform the following:
o Adjust charging flow to REGEN Hx, HCV-142 as necessary.
-OR-o RCP seal injection flow-GREATER THAN 6 GPM o
Dispatch AO to adjust seal injection needle valves V-300A and V-300B if necessary.
27 Initiate RCS Cooldown to 350'F In RCS Cold Legs:
- a. Establish and maintain cooldown rate in RCS cold legs LESS THAN 100'F/HR b.
Dump steam to condenser from intact S/G
- b. Manually or locally dump steam using intact S/G ARV.
IF no intact S/G available, THEN use faulted S/G.
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ECA-3.3 jjZLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 22 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION RCS AND RUPTURED S/G PRESSURES MUST BE MAINTAINED LESS THAN THE RUPTURED S/G ARV SETPOINT.
28 Control Charging Flow To Maintain RCS Subcooling:
a..RCS subcooling based on core exit T/Cs GREATER THAN 20'F USING FIGURE MIN SUBCOOLING
- b. Ruptured S/G narrow range level LESS THAN 90%
(85% adverse CNMT]
- c. Ruptured S/G narrow range level STABLE OR DECREASING
- a. Increase charging flow to maintain subcooling greater than 20'F using Figure MIN SUBCOOLING and go to Step 29.
- b. Control charging flow to maintain RCS pressure at ruptured S/G pressure and go to Step 29,
- c. IF ruptured S/G level increasing, THEN decrease charging flow to stabilize level.
Maintain RCS subcooling greater than 20'F using Figure MIN SUBCOOLING.
29 Check If RCS Cooldown Should Be Stopped:
a.
RCS cold leg temperatures LESS THAN 350'F
- a. Return to Step 25.
b.
Stop RCS cooldown
5 J
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 23 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 30 Check RCS Pressure GREATER THAN 400 PSIG
[300 PSIG adverse CNMT]
Go to Step 33.
- 31 Monitor Ruptured S/G Narrow Range Level GREATER THAN 174 t'254 adverse CNMT]
Refill ruptured S/G to 67%
[55%
adverse CNMT) using feed flow.
IF either of the following conditions occurs, THEN stop feed flow to ruptured S/G:
o Ruptured S/G pressure decreases in an uncontrolled manner.
-OR-o Ruptured S/G pressure increases to 1020 psig.
Iil
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 24 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
STEAM SHOULD NOT BE RELEASED FROM A RUPTURED S/G IF WATER MAY EXIST IN ITS STEAMLINE.
o RUPTURED S/G PRESSURE MAY DECREASE RAPIDLY WHEN STEAM IS RELEASED.
NOTE:
The upper head region may void during RCS depressurization if RCPs are not running.
This may result in a rapidly increasing PRZR level.
32 Depressurize RCS And Ruptured S/G To 400 PSIG
Perform the following:
o Decrease charging and increase letdown to initiate backfill
-OR-o Initiate blowdown from ruptured S/G
-OR-o Dump steam from ruptured S/G b.
Check RCS pressure LESS THAN 400 psig
[300 psig adverse CNMT]
c.
Stop RCS depressurization
- b. Return to Step 31.
~
h
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 25 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 33 Check If RHR Normal Cooling Can Be Established:
a.
RCS cold leg temperature LESS THAN 350'F
- a. Return to Step 27.
b.
RCS pressure
- LESS THAN 400 psig (300 psig adverse CNMT)
- c. Place RCS overpressure protection system in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)
- b. Return to Step 31.
- c. IF RCS overpressure protection system can NOT be placed in
NOTE:
Leakage from ruptured S/G into RCS will dilute RCS boron concentration.
34 Verify Adequate Shutdown Margin
- b. Borate as necessary.
/
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ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 26 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 35 Initiate RCS Cooldown To Cold Shutdown:
- a. Establish and maintain cooldown rate in RCS cold legs
- LESS THAN 100'F/HR b.
Use RHR system if in service c.
Dump steam to condenser from intact S/G
- c. Manually or locally dump steam from intact S/G using ARVs.
IF no intact S/G available and RHR system NOT in service, THEN
-use faulted S/G.
36 Control Charging Flow To Maintain RCS Subcooling:
a.
RCS subcooling based on core exit T/Cs GREATER THAN 20'F USING FIGURE MIN SUBCOOLING
- b. Ruptured S/G narrow range level LESS THAN 90%
[85% adverse CNMT]
- c. Ruptured S/G narrow range level
-- STABLE OR DECREASING
- a. Increase charging flow to maintain subcooling greater than 20'F using Figure MIN SUBCOOLING and go to Step 37.
- b. Control charging flow to maintain RCS pressure at ruptured S/G pressure and go to Step 37.
cd IF ruptured S/G level increasing, THEN decrease charging flow to stabilize level.
Maintain RCS subcooling greater than 20'F using Figure MIN SUBCOOLING.
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ECA-3.3 SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 27 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
- 37 Monitor RCP Operation:
a.
- ANY RUNNING b.
Check the following:
o RCP ¹1 seal D/P -
LESS THAN 220 PSID a.
Go to Step 39.>
b.
Go to Step 39.
-OR-Check RCP seal leakage LESS THAN 0.25 GPM
- c. Stop affected RCP(s) 38 Check Core Exit T/Cs LESS THAN 200'F Return to Step 34.
39 Evaluate Long Term Plant Status:
.a. Maintain cold shutdown conditions
- b. Consult TSC
-END-
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EOP:
ECA-3.3 TITEE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 1 of 1 ECA-3.3 APPENDIX LIST TITLE 1)
RED PATH
SUMMARY
2)
FIGURE MIN SUBCOOLING 3)
FIGURE SDM 4)
ATTACHMENT RCP START 5)
ATTACHMENT N2 PORVS 6)
ATTACHMENT RUPTURED S/G 7)
ATTACHMENT D/G STOP 8)
ATTACHMENT SD-1 9)
ATTACHMENT SEAL COOLING 10)
ATTACHMENT SD-2 11)
ATTACHMENT RHR COOL I
12)
ATTACHMENT AUX BLDG SW 13)
FOLDOUT PAGES
1' "l
EOP:
ECA-3.3 LITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 10 PAGE 1 of 1 RED PATH
SUMMARY
a.
SUBCRITICALITY Nuclear power greater than 54 b.
CORE COOLING Core exit T/Cs greater than 1200 F
-OR-Core exit T/Cs greater than 700'F AND RVLIS level (no RCPs) less than 434
[464 adverse CNMT]
c.
HEAT SINK Narrow range level in all S/Gs less than 54
[254 adverse CNMT] AND total feedwater flow less than 200 gpm d.
INTEGRITY Cold leg temperatures decrease greater than 100'F in last 60 minutes AND RCS cold leg temperature less than 285'F e.
CONTAINMENT CNMT pressure greater than 60 psig
V'
EOP:
ECA-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 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 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0
S PRESSURE (PSIG)
RCS PRESSURE INCREMENTS 20 PSIG SUBCOOLED REGION E
CNM ADVERS 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-3.3 TITLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 1 of 1 FIGURE SDM NOTE:
o Curve includes allowance for one stuck rod.
Add 100 ppm for each additional stuck rod.
o To obtain core burnup, use PPCS turn on code BURNUP.
BORON CONCENTRATION (PPH) 1800 1600 BORON INCREMENTS 20 PPH 1400 1200 1000 ADEQUATE SDH 100 PPH CONSERVATISM INCLUDED 800 600 400 ORATE 200 BURNUP INCREMENTS 100 MWD/HTU 0
1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 CYCLE 24 BURNUP (MWD/MTU)
V
EOP:
ECA-3.3 1'tTLE:
SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:
10 PAGE 1 of 1 FOLDOUT PAGE SI REINITIATION CRITERIA IF EITHER condition listed below occurs, THEN manually operate SI pumps as necessary and go to ECA-3.1, SGTR WITH LOSS OF REACTOR COOLANT SUBCOOLED RECOVERY DESIRED, Step 1:
o RCS subcooling based on core exit TCs
LESS THAN O'F USING REQUIREMENTS OF FIGURE MIN SUBCOOLING OR o
LESS THAN 68%
[734 adverse CNMT]
2.
SECONDARY INTEGRITY CRITERIA IF any S/G pressure is decreasing in an uncontrolled manner or is completely depressurized AND has not been
- isolated, THEN go to E-2, FAULTED S/G ISOLATION, Step 1,
unless faulted S/G needed for RCS cooldown.
3.
COLD LEG RECIRCULATION SWITCHOVER CRITERION IF RWST level decreases to less than 284, THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step 1.
4.
AFW SUPPLY SWITCHOVER CRITERION IF CST level decreases to less than 5 feet, THEN switch to alternate AFW water supply (Refer to ER-AFW.1, ALTERNATE WATER SUPPLY TO AFW PUMPS).
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