ML17250B111

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Rev 5 to ECA-3.3, SGTR W/O Pressurizer Pressure Control
ML17250B111
Person / Time
Site: Ginna Constellation icon.png
Issue date: 04/09/1990
From: Widay J
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17250B096 List:
References
ECA-3.3, NUDOCS 9004200680
Download: ML17250B111 (64)
v • d • e


Text

EOP:

ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV0 5

PAGE 1 of 27 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE P

T SUPERI TE DENT EFFECTIVE DATE QA~ NON-QA CATEGORY 1.0 GINNASpiry(ON Qi APT REVIEWED BY:

TIh>

-'9004200680 900410

'(

PDR ADOCf( 05000244 P

PNU DATE TIME

r

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 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.

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 5

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 llA 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:

a. Verify IA to CNMT - AVAILABLE
a. 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 OX.

b.

Go to E-3, STEAM GENERATOR TUBE

RUPTURE, Step 20 4)

Go to Step 4.

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ECA-3.3 SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 5

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

b. Check IA to CNMT - AVAILABLE
c. Verify at least one PRZR PORV flow path - AVAILABLE d.

Go to E-3, STEAM GENERATOR TUBE

RUPTURE, Step 21 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.

~ 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.

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ECA-3.3 TITLE:

SGTR NITHOUT PRESSURIZER PRESSURE CONTROL REV 5

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 aT limit between the spray line and PRZR does not apply.

5 Try To Establish Auxiliary Spray:

a. Charging pumps

- AT LEAST ONE RUNNING

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 20b
a. Perform the following:
1) IP CCW flow is lost to any RCP thermal barrier OR any RCP fl seal outlet temperature offscale high, THEN locally isolate seal infection to affected RCP.

~ RCP A, V-300A

~ RCP B, V-300B

2) Ensure HCV-142 demand at OX.
3) Start charging pumps as necessary.

IP charging not available, THEN go to Step 6.

b. IP auxiliary spray can NOT be established, THEN go to Step 6.

I t

lt ~4'PJ

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 5

PAGE 6 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED CAUTION IF CST LEVEL DECREASES TO LESS THAN 5 FEET, THEN ALTERNATE VATER SOURCES FOR AFV PUMPS VILL BE NECESSARY (REFER TO ER-AFV.1, ALTERNATE VATER SUPPLY TO AFV PUMPS).

  • * * * * * * * * * * * * * * * *
  • 4 * * * * * * * * * * * * * * * * * * * * *
  • NOTE:

TDAFW pump flow control valves fail open on loss of IA.

6 Check Intact S/G Level:

a. Narrow range level - GREATER THAN 5X [25X adverse CNMT]
a. Maintain total feed flow greater than 200 gpm until narrow range level greater than 5X [25X adverse CNMT] in at least one S/G.
b. Control feed flow to maintain narrow range level between 17X

[25X adverse CNMT] and 50%

b. IF narrow range level in intact S/G continues to increase in an uncontrolled
manner, THEN go to ECA-3.1, SGTR VITH LOSS OF REACTOR COOLANT -

SUBCOOLED RECOVERY DESIRED, Step l.

7 Check PRZR Level GREATER THAN 54 [30: adverse CNMT]

Return to Step l.

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 5

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-o Narrow range level in intact S/G - GREATER THAN 5X [25X adverse CNMTJ

c. RVLIS indication o

Level (no RCPs)

- GREATER THAN 68X [73X adverse CNMTj

-OR-a.

Do NOT stop SI pumps.

Go to ECA-3.1, SGTR WITH LOSS OF REACTOR COOLANT -

SUBCOOLED RECOVERY 'DESIRED, Step l.

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 1.

c.

Do NOT stop SI pumps.

Go to ECA>>3.1, SGTR WITH LOSS OF REACTOR COOLANT -

SUBCOOLED RECOVERY DESIRED, Step l.

o Fluid fraction (any RCP running) - GREATER THAN 80X

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.

9 Stop SI Pumps and Place In AUTO

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SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 8 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED CAUTION ALIGNING SI PUMP SUCTION TO RWST BEFORE ISOLATING BAST MAY RESULT IN BACKFLOW FROM RWST TO BASTS.

10 Verify SI Pump Suction Aligned To RWST:

a.

SI pump suction valves from BASTs - CLOSED

~ MOV-826A

~ MOV-826B

~ MOV-826C

~ MOV-826D

a. Ensure at least one valve in each flow path closed.

~ MOV-826A or MOV-826B

~ MOV-826C or MOV-826D

b. SI pump suction valves from RWST OPEN

~ MOV-825A

~ MOV-825B

b. Ensure at least one valve is open.
c. Consult TSC to determine if SI flush is required (Refer to Attachment SI PLUSH)

k

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 9 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 11 Check If Charging Flow Has Been Established:

a. Charging pumps - ANY RUNNING
a. Perform the following:
1) IP CCW flow is lost to any RCP thermal barrier OR any RCP fl seal outlet temperature offscale high, THEN dispatch AO with key to RWST gate to close seal in]ection needle valve(s) to affected RCP:

~ RCP A, V-300A

~ RCP B, V-300B

b. Charging pump suction aligned to RWST:

o LCV-112B -

OPEN o

LCV-112C - CLOSED

2) Ensure HCV-142 open, demand at OX.
b. Manually align valves as necessary.

IP LCV-112B can NOT be opened, THEN perform the following:

1) Verify charging pump A NOT running and place in PULL STOP.
c. Start charging pumps as necessary and ad5ust charging flow to restore PRZR level
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).

~ '

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV' PAGE 10 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 12 Verify SI Flow Not Required:

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 CNMT]

-OR-o Fluid fraction (any RCP running) - GREATER THAN 80%

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 l.

13 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.

b. Establish SW to AUX BLDG (Refer to Attachment AUX BLDG SW).

. c. Verify CNMT RECIRC fan annunciator C-2, HIGH TEMPERATURE ALARM - EXTINGUISHED

c. Dispatch AO to locally throttle flow to CCW Hx to between 5000 gpm and 6000 gpm total flow.

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 11 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 14 Check If Normal CVCS Operation Can Be Established

a. Verify IA restored:

o IA to CNMT (AOV-5392) -

OPEN o

IA pressure

- GREATER THAN 60 PSIG

b. Verify instrument bus D-ENERGIZED c.

CCW pumps - ANY RUNNING

d. Charging pump - ANY RUNNING
a. Continue with Step 19.

WHEN IA

restored, THEN do Steps 14 through 18.
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 gl seal outlet temperature offscale high, THEN isolated CCW to thermal barrier of affected RCP(s).

~ RCP A, MOV-749A and MOV-759A

~ RCP B, MOV-749B and MOV-759B

2) Manually start one CCW pump.
d. Continue with Step 20.

WHEN any charging pump running, THEN do Steps 15 through 19.

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SGTR NITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 12 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 15 Check If Seal Return Flow Should Be Established:

a. Verify RCP gl seal outlet temperature LESS THAN 235'F j
b. Verify RCP seal outlet valves-OPEN 0 AOV-270A

~ AOV-270B a.

Go to Step 16.

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 Pl seal leakoff flow

- LESS THAN 5.5 GPM

f. Verify RCP fl seal leakoff flow

- GREATER THAN 0.25 GPM

d. Perform the following:
1) Place MOV-313 switch to OPEN.
2) Dispatch AO with key to RWST gate to locally open MOV-313.
e. IP 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 IP both RCP seal discharge valves are shut, THEN go to Step 16.

f. Refer to AP-RCP.1, RCP SEAL MALPUNCTION.

S

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 13 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED NOTE: If PRZR level is less than 13X, letdown may be established by placing AOV-427 to OPEN.

16 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 TCV-130 and PCV-135 in MANUAL at 25X open
d. Reset both trains of XY relays for AOV-371 and AOV-427 e.

Open AOV-371 and AOV-427

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. Ad)ust charging pump speed and HCV-142 as necessary 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 CCV 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 charging pump speed as necessary.

IF RCP seal return NOT established, THEN consult TSC to determine if excess letdown should be placed in service.

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 5

PAGE 14 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 17 Check VCT Makeup System:

a.

BAST levels - ANY GREATER THAN 5%

b. Check Annunciator B-23, BORIC ACID TANK LO LO LEVEL-EXTINGUISHED a.

Go to Step 18.

b. Perform the following:
1) Adjust boric acid flow control valve to required flow from table.

BAST LEVEL

<10%

10-15X 15-20X

>20%

BORIC ACID FLOW (GPM) 4.5 6.7 8.9 10.0

c. Adjust boric acid flow control valve in AUTO to 4.5 gpm
d. Verify the following:

1)

RMW mode selector switch in AUTO 2)

RMW control armed - RED LIGHT LIT 2)

Go to Step 17d.

d. Adjust controls as necessary.

e.

Check VCT level:

o Level - GREATER THAN 20X

-OR-o Level - STABLE OR INCREASING

e. 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-ill in MANUAL.
3) Increase RMW flow.

II

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ECA-3.3 SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 15 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 18 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 RUST 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 19.

@HEN VCT level greater than 40%,

THEN do Step 18b.

b. Manually align valves as,

. necessary.

19 Equalize Charging And Letdown Flows:

a. Verify charging pump controllers in manual
b. Control charging and seal infection flows to equal letdown and seal leakoff flows

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5 PAGE 16 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 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 rej ec t from ho twell to CST:

o Place hotwell level controller (HC-107) in MANUAL at 50X

a. 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 complete (Refer to Attachment RUPTURED S/G)

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 17 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 22 Check RCP Cooling:

a.

Check CCW to RCPs:

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 in5ection:

o Labyrinth seal D/Ps - GREATER THAN 15 INCHES OF WATER

-OR-o RCP seal injection flov to each RCP - GREATER THAN 6 GPM

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 5

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.

23 Check If Source Range Detectors Should Be Energized:

a.

Source range channels-DEENERGIZED a.

Go to Step 23e.

b. Check intermediate range flux-EITHER CHANNEL LESS THAN 1P"~o AMPS
b. Perform the following:
1) IR neither intermediate range channel is decreasing, THEN initiate boration.

c.

Check the following:

o Both intermediate range channels

- LESS THAN 10-~o AMPS

2) Continue with Step 24.

VHRN flux is LESS THAN 10-'~ amps on any operable

channel, THEN do Steps 23c through e.
c. Continue with Step 24.

VHEN either condition met, THEN do Steps 23d and e.

-OR-o Greater than 20 minutes since reactor trip

d. Verify source range detectors-ENERGIZED
e. Transfer Rk-45 recorder to one source range and one intermediate range channel
d. Manually energize source range detectors by depressing P-6

.permissive defeat pushbuttons (2

of 2).

IR source ranges can NOT be

restored, THEN refer to ER-NIS.1, SR MALFUNCTION and go to Step 23.

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5 PAGE 19 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 24 Establish Normal Shutdown Alignment:

a.

Check condenser

- AVAILABLE

b. Perform the following:

o Open generator disconnects 1G13A71

~ 9X13A73

a. Dispatch AO to perform

. Attachment SD-2.

o Place voltage regulator to OFF o

Open turbine drain valves o

- Rotate reheater steam supply controller cam to close valves o

Place reheater dump valve switches to HAND o

Stop all but one condensate pump

c. Verify adequate Rx head cooling:
1) Check IA to CNMT - AVAILABLE
2) Verify at least one control rod shroud fan - RUNNING
3) Verify one Rx compartment cooling fan - RUNNING
d. Verify Attachment SD COMPLETE 1)

Go to Step 25.

2) Manually start one fan as power supply permits (45 kw)
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)

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ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 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 restore'd to greater than 5% [30%

adverse CNMT] and then further recovery should continue with 37.

25 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 12.

o RVLIS indication - GREATER THAN 68X l73% adverse CNMT)

b. Dispatch" AO with locked valve key to locally close breakers for SI ACCUM discharge valves

~ 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 REVS 5

PAGE 21 of 27.

STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED NOTE:

Leakage from ruptured S/G into RCS will dilute RCS boron concentration.

26 Verify Adequate Shutdown Margin

a. Direct HP to sample RCS and ruptured S/G for boron concentration
b. Verify boron concentration-GREATER THAN REQUIREMENTS OP FIGURE SDM
b. Borate as necessary.

27 Maintain Required RCP Seal Injection Flow And Labyrinth Seal D/P:

o Labyrinth seal D/P to each RCP-GREATER THAN 15 INCHES OP VATER 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.

28 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.

0

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ECA-3.3 jITLf:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 5

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.

29 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 90X [85X 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 30.
b. Control charging flow to maintain RCS pressure at ruptured S/G pressure and go to Step 30.
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.

30 Check If RCS Cooldown Should Be Stopped:

a.

RCS cold leg temperatures

- LESS "THAN 350'F

a. Return to Step 26.
b. Stop RCS cooldown

T 1

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5 PAGE 23 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 31 Check RCS Pressure GREATER THAN 400 PSIG

[300 PSIG adverse CNMT]

Go to Step 34.

32 Check Ruptured S/G Narrow Range Level GREATER THAN 174

[254 adverse CNMT]

Refill ruptured S/G to 67X [55X adverse CNMT] using feed flow.

IP 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.

I

~

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SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 5

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.

33 Depressurize RCS And Ruptured S/G To 400 PSIG 1300 PSIG adverse CNMT]

a. 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 32.

k '

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5 PAGE 25 of 27 STEP ACTION/EXPECTED RESPONSE RESPONSE.

NOT OBTAINED 34 Check If RHR Normal Cooling Can Be Established:

a.

RCS cold leg temperature

- LESS THAN 350'F

a. Return to Step 28.

b.

RCS pressure

- LESS THAN 400 psig [300 psig adverse CNMT]

b. Return to Step 32.

C ~ Place RCS overpressure protection system in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)

c. IF RCS overpressure protection system can NOT be placed in
service, THEN notify TSC of potential Tech Spec violation if RHR system is placed in service.
d. Establish RHR normal cooling (Refer to Attachment RHR COOL)

NOTE:

Leakage from ruptured S/G into RCS will dilute RCS boron concentration.

35 Verify Adequate Shutdown Margin

a. Direct HP to sample RCS and ruptured S/G for boron concentration
b. Verify boron concentration-GREATER THAN REQUIREMENTS OF FIGURE SDM
b. Borate as necessary.

I

EOP:

ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 26 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 36 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.

37 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 90X [85X 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 38.
b. Control charging flow to maintain RCS pressure at ruptured S/G pressure and go to Step 38.
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.

C Y

EOP:

ECA-3..3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 27 of 27 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 38 Check If RCPs Must Be Stopped:

a.

RCPs - ANY RUNNING

b. Check the following:

o RCP gl seal D/P - LESS THAN 220 PSID a.

Go to Step 39.

b.

Go to Step 39.

-OR-o Check RCP seal leakage

- LESS THAN 0.25 GPM

c. Stop affected RCP(s) 39 Check Core Exit T/Cs LESS THAN 200'F Return to Step 35.

40 Evaluate Long Term Plant Status:

a. Maintain cold shutdown conditions
b. Consult TSC

-END-

EOP:

ECA-3.3 SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV' PAGE 1 of 1 ECA-3.3 APPENDIX LIST TITLE PAGES 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 12)

ATTACHMENT AUX BLDG SW 13)

ATTACHMENT SI FLUSH 14)

FOLDOUT

n

EOP:

ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV 5

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 t'464 adverse CNMT) c.

HEAT SINK '- Narrow range level in all S/Gs less than 54

[25% 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

EOP ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 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 CNMT 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 ('P)

EOP:

ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 1 of 1 FIGURE SDM BORON CONCENTRATION,(PPM) 1800 1600 BORON INCREMENT 20 PPM 1400 1200 ADEQUATE SDM 1000 soo 600 400 ORATE 200 BURNUP INCREMENTS 100 MWD/MTU 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 CYCLE BURNUP (MWD/MTU)

NOTE: To obtain core burnup, use PPCS turn on code BURNUP.

EOP:

ECA-3.3 TITLE:

SGTR WITHOUT PRESSURIZER PRESSURE CONTROL REV:

5 PAGE 1 of 1 FOLDOUT PAGE SI REINITIATION CRITERIA IF E1THER 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 USXNG REQUIREMENTS OF FIGURE MIN SUBCOOLXNG OR o

RVLIS level (no RCPs)

LESS THAN 684

[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 ISOLATXON, Step 1,

unless S/G needed for RCS cooldown.

1 3.'OLD 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.l, ALTERNATE WATER SUPPLY TO AFW PUMPS).

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