ML17263A599

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Rev 9 to EOP ECA-2.1, Uncontrolled Depressurization of Both Steam Generators
ML17263A599
Person / Time
Site: Ginna Constellation icon.png
Issue date: 03/30/1994
From:
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17263A585 List:
References
ECA-2.1, NUDOCS 9404190158
Download: ML17263A599 (70)
v • d • e


Text

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 9

PAGE 1 of 31 ROCHESTER GAS AND ELECTRIC CORPORATION GXNNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE PLANT SUPERINTENDENT 7

Cj EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:

(

9404I,90158 940414 PDR ADDCK 05000244 P

PDR

I

>,.f ri

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV0 9

PAGE 2 of 31 A.

PURPOSE This procedure provides actions to mitigate and minimize a loss of secondary coolant from both steam generators.

B.

ENTRY CONDITIONS/SYMPTOMS 1.

ENTRY CONDITIONS This procedure is entered from:

a.

E-2, FAULTED STEAM GENERATOR ISOLATION, when an uncontrolled depressurization of both steam generators occurs.

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 3 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED CAUTION o

IF ANY S/G PRESSURE INCREASES AT ANY TIME DURING THIS PROCEDURE, THEN E-2, FAULTED STEAM GENERATOR ISOLATION, SHOULD BE PERFORMED' IF THE TDAFW PUMP IS THE ONLY AVAILABLESOURCE OF FEED FLOW, THEN STEAM SUPPLY TO THE TDAFW PUMP MUST BE MAINTAINED FROM ONE S/G.

NOTE:

o FOLDOUT page should be open AND monitored periodically.

o Conditions should be evaluated for Site Contingency Reporting (Refer to EPIP 1-0, GINNA STATION EVENT EVALUATION AND CLASSIFICATION).

o Adverse CNMT values should be used whenever CNMT pressure

$ s greater than 4 psig or CNMT radiation is greater than 10+O~ R/hr.

1 Check Secondary Pressure Boundary:

o MSIVs -

CLOSED o

MFW flow control valves CLOSED

~ MFW regulating valves

~ MFW bypass valves o

MFW pump discharge valves CLOSED o

S/G blowdown and sample valves CLOSED o

TDAFW pump steam supply valves-PULL STOP o

TDAFW pump flow control valves-CLOSED o

S/G ARVs -

CLOSED o

Dispatch AO to locally isolate S/Gs (Refer to Attachment FAULTED S/G)

Manually close valves one loop at a time.

IF valves can NOT be closed, THEN dispatch AO to locally isolate flowpaths, as necessary, one loop at a time.

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 4 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED CAUTION A MINIMUM FEED FLOW OF 50 GPM MUST BE MAINTAINED TO EACH S/G WITH A NARROW RANGE LEVEL LESS THAN 5%

[25% ADVERSE CNMT].

2 Control Feed Flow To Minimize RCS Cooldown:

a.

Check cooldown rate in RCS cold legs

- LESS THAN 100'F/HR b.- Check narrow range level in both S/Gs

- LESS THAN 50%

c.

Check RCS hot leg temperatures STABLE OR DECREASING a.

Decrease feed flow to 50 gpm to'ach S/G and go to Step 2c.

b. Control feed flow to maintain narrow range level less than 50%

in both S/Gs.

c. Control feed flow or dump steam to stabilize RCS hot leg temperatures.

3 Check If RCPs Should Be Stopped:

a.

RCP status

- ANY RCP RUNNING

b. SI pumps

- AT LEAST TWO RUNNING c.

RCS pressure minus maximum S/G

=pressure

- LESS THAN 175 psig

[400 psig adverse CNMT)

d. Stop both RCPs a.

Go to Step 4.

b.

Go to Step 4.

c.

Go to Step 4.

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 5 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 4 Check CST Level GREATER THAN 5 FEET Switch to alternate AFW suction supply (Refer to ER-AFW.1, ALTERNATE WATER SUPPLY TO AFW PUMPS).

CAUTION IF ANY PRZR PORV OPENS BECAUSE OF HIGH PRZR,PRESSURE>

IT SHOULD BE CLOSED AFTER PRESSURE DECREASES TO LESS THAN 2335 PSIG (REFER TO STEP 5B).

  • 5 Monitor PRZR PORVs And Block Valves:

a.

Power to PORV block valves-AVAILABLE b.

PORVs CLOSED

a. Restore power to block valves unless block valve was closed to i,solate an open PORV:

~ MOV-515, MCC C position 6C

~ MOV-516, MCC D position 6C

b. IF PRZR pressure less than 2335 psig, THEN manually close PORVs.

IF any PORV can NOT be closed, THEN manually close its block valve.

IF block valve can NOT be closed, THEN dispatch AO to locally check breaker.

~ MOV-515, MCC C position 6C

~ MOV-516, MCC D position 6C

c. Block valves

- AT LEAST ONE OPEN c.

Open one block valve unless it was closed to isolate an open PORV.

EOP:

ECA-2. 1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 6 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 6

Check Secondary Radiation Levels NORMAL o

Steamline radiation monitor (R-31 and R-32) o Dispatch AO to locally check steamline radiation Go to E-3, STEAM GENERATOR TUBE

RUPTURE, Step l.

o Request HP sample S/Gs for activity CAUTION IF OFFSITE POWER IS LOST AFTER SI RESET, THEN SELECTED SW PUMPS AND ONE CCW PUMP WILL AUTO START ON EMERGENCY D/G.

MANUAL ACTION WILL BE REQUIRED TO RESTART SAFEGUARDS EQUIPMENT.

7 Reset SI

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 7 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED CAUTION RCS PRESSURE SHOULD BE MONITORED.

IF RCS PRESSURE DECREASES TO LESS THAN 250 PSIG

[465 PSIG ADVERSE CNMT], THEN THE RHR PUMPS MUST BE MANUALLY RESTARTED TO SUPPLY WATER TO THE RCS.

8 Check If RHR Pumps Should Be Stopped:

a.

RHR pumps

- ANY RUNNING

b. Check RCS Pressure:

a.

Go to Step 9.

1) Pressure

- GREATER THAN 250 psig [465 psig adverse CNMT)

2) Pressure

- STABLE OR INCREASING 1)

Go.to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step 1.

2)

Go to Step 9.

c. Stop RHR pumps and place in AUTO

S 8'

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ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 8 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED

  • 9 Monitor If CNMT Spray Should Be Stopped:

a.

CNMT spray pumps

- RUNNING b.

Check the following:

o CNMT pressure LESS THAN 4 PSIG a.

Go to Step 10.

b. Continue with Step 10.

WHEN BOTH conditions satisfied, THEN do Steps 9c through f.

o Sodium hydroxide tank level-LESS THAN 55%

c. Reset CNMT spray d.

Check NaOH tank outlet valves CLOSED

~ AOV-836A

~ AOV-836B

d. Place NaOH tank outlet valve controllers to MANUAL and close valves.

~ AOV-836A

~ AOV-836B e.

Stop CNMT spray pumps and place in AUTO

f. Close CNMT spray pump discharge valves

~MOV-860A

~ MOV-860B

~ MOV-860C

~ MOV-860D

UI

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 9 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 10 Check RWST Level GREATER THAN 28%

Go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step 1.

11 Reset CI:

a.

Depress CI reset pushbutton

b. Verify annunciator A-26, CNMT ISOLATION - EXTINGUISHED
b. Perform the following:
1) Reset SI.
2) Depress CI reset pushbutton.

12 Verify Adequate SW Flow:

a.

Check at least two SW pumps RUNNING

a. Manually start SW pumps as power supply permits (258 kw each).

IF less than two SW pumps

running, THEN perform the following:
1) Ensure SW isolation.
b. Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1)
2) Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1) 3)

Go to Step 14.

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 10 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 13 Establish IA to CNMT:

a. Verify non-safeguards busses energized from offsite power o

Bus 13 normal feed CLOSED

-OR-o Bus 15 normal feed CLOSED

b. Verify SW isolation valves to turbine building -

OPEN

~ MOV-4613 and MOV-4670

~ MOV-4614 and MOV-4664

c. Verify at least two air compressors

- RUNNING d.

Check IA supply:

o Pressure GREATER THAN 60 PSIG o

Pressure STABLE OR INCREASING

e. Reset both trains of XY relays for IA to CNMT AOV-5392
f. Verify IA to CNMT AOV-5392 -

OPEN a.

Perform the following:

1) Close non-safeguards bus tie breakers:

~ Bus 13 to Bus 14 tie

~ Bus 15 to Bus 16 tie

2) Verify adequate emergency D/G capacity to run air compressors (75 kw each).

IF NOT, THEN evaluate if CNMT RECIRC fans should be stopped (Refer to Attachment CNMT RECIRC FANS).

3)

WHEN bus 15 restored, THEN reset control room lighting.

b. Manually align valves.
c. Manually start air compressors

's power supply permits (75'kw each).

IF air compressors can NOT be started, THEN dispatch AO to locally reset compressors as necessary.

d. Perform the following:
1) Continue attempts to restore IA (Refer to AP-IA.1, LOSS OF INSTRUMENT AIR).
2) Continue with Step 14.

WHEN IA restored, THEN do Steps 13e and f.

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ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAN GENERATORS REV:

9 PAGE ll of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 14 Check If SI ACCUMs Should, Be Isolated:

a.

Both RCS hot leg temperatures LESS THAN 400'F a.

Go to Step 15.

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

d. Locally reopen breakers for MOV-841 and MOV-865
c. Vent any unisolated ACCUMs:
1) Open vent valves for unisolated SI ACCUMs,

~ ACCUM A, AOV-834A

~ ACCUM B> AOV-834B

2) Open HCV-945.

15 Check Normal Power Available To Charging Pumps:

o Bus 14 normal feed breaker-CLOSED o

Bus 16 normal feed breaker-CLOSED Verify adequate emergency D/G capacity to run charging pumps (75 kw each).

IF NOT, THEN evaluate if CNMT RECIRC fans can be stopped (Refer to Attachment CNMT RECIRC FANS).

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 9

PAGE 12 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 16 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 ¹1 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 Oa.

b, Align charging pump suction to RWST' LCV-112B -

OPEN o

LCV-112C -

CLOSED

b. IF 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 adjust 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).

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 9

PAGE 13 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED

  • 17 Monitor SI Termination Criteria:
a. SI pumps

- ANY RUNNING

b. Check RCS pressure:

o Pressure

- GREATER THAN 1625 psig [1825 psig adverse CNMT]

o Pressure

- STABLE OR INCREASING a.

Go to Step 19.

b.

DO NOT stop SI pumps.

Perform the following:

1) Energize PRZR heaters and operate PRZR spray as necessary to stabilize RCS pressure greater than 1625 psig (1825 psig adverse CNMT]

c.

RCS subcooling based on core exit, T/Cs

- GREATER THAN O' USING FIGURE MIN SUBCOOLING d.

PRZR level - GREATER THAN 5%

[30% adverse CNMT]

2) Return to Step 2.

c.

DO NOT stop SI pumps.

Return to Step 2.

d.

Do NOT stop SI pumps.

Perform the following:

1) IF normal PRZR spray available, THEN try to stabilize RCS pressure with PRZR spray.
2) Return to Step 17a.

18 Stop SI and RHR Pumps And Place In Auto

EOP:

ECA-2.1 TI1'LE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 9

PAGE 14 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED

  • 19 Monitor SI Reinitiation Criteria:

a.

RCS subcooling based on core exit T/Cs

- GREATER THAN. O' USING FIGURE MIN SUBCOOLING a'. Manually operate SI pumps as necessary and return to Step 2.

b.

PRZR level - GREATER THAN 5%

[30$ adverse CNMT]

b. Control charging flow to maintain PRZR level.

IF PRZR level can NOT be maintained, THEN manually operate SI pumps as necessary and return to Step 2.

20 Check RCS Hot. Leg Temperatures STABLE OR DECREASING Control feed flow or dump steam to stabilize RCS hot leg temperatures.

21 Check Narrow Range Level In Both S/Gs LESS THAN 504 Control feed flow to maintain narrow. range level less than 50% in both S/Gs.

22 Verify Adequate SW Flow To CCW Hx:

a. Verify at least two SW pumps RUNNING
b. Verify AUX BLDG SW isolation valves OPEN
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 28.

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

~ MOV-4615 and MOV-4734

~ MOV-4616 and MOV-4735

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.

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 9

PAGE 15 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 23 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 a.

Continue with Step 28.

WHEN IA

restored, THEN do Steps 23 through 27.
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 51 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 28.

WHEN any charging pump running, THEN do Steps 24 through 27.

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 9

PAGE 16 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 24 Verify PRZR Level GREATER THAN 134 I;404 adverse CNMT]

Continue with Step 26.

WHEN PRZR level'ncreases to greater than 13%

[40$ adverse CNMT], THEN do Step 25.

25 Establish Normal Letdown:

a. Verify 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 35% open

~ TCV-130

+ PCV-135

d. Reset both trai'ns of ZY 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. Adjust '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 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 charging pump speed as necessary.

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

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURXZATION OF BOTH STEAM GENERATORS REV 9

PAGE 17 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED

'26 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 and increase RMW flow.
3) Increase boric acid flow as necessary.

r

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURXZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 18 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 27 Check Charging Pump Suction Aligned To VCT:

a.

VCT level - GREATER THAN 208

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 28.

WHEN VCT level greater than 40%,

THEN do Step 27b

b. Manually align valves as necessary.

EOP:

ECA-2.1 T1TLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 9

PAGE 19 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 28 Check RCP Cooling:

a.

Check CCW to RCPs:

o Annunciator A-7, RCP fA CCW RETURN HIGH TEMP OR LOW FLOW EXTINGUISHED Establish normal cooling to RCPs (Refer to Attachment SEAL COOLING).

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

~ al

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ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAN GENERATORS REV:

9 PAGE 20 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 29 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 a.

Go to Step 30.

b. Manually open valves as necessary.,

~ AOV-270A

~ AOV-270B

c. Reset both trains of XY relays for RCP seal return isolation valve MOV-313 d.

Open RCP seal return isolation valve MOV-313

d. Perform the following:
1) Place MOV-313 switch to OPEN.
e. Verify RCP ¹1 seal leakoff flow LESS THAN 5.5 GPM
f. Verify RCP ¹1 seal leakoff flow GREATER THAN 0'5 GPM
2) Dispatch AO with key to RWST gate to locally open MOV-313.
e. IF any RCP seal leakoff flow greater than 5.5 gpm THEN:

o Close the affected RCP seal discharge val~e

~ 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 30.

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

EOP:

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9 PAGE 21 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED NOTE:

o If auxiliary spray is in use, spray flow may be increased by closing normal charging valve AOV-294 and normal PRZR spray valves.

o When using PRZR PORV, select one with an operable block valve.

t 30 Energize 'Heaters And Operate Normal Spray As Necessary To Maintain RCS Pressure Stable IF normal spray NOT available and letdown is in service, THEN use auxiliary spray valve (AOV-296).

IF PRZR spray NOT available, THEN use one PRZR PORV.

IF IA NOT available, THEN refer to Attachment N2 PORVS.

EOP:

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9 PAGE 22 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED

31. Verify All AC Busses ENERGIZED BY OFFSITE POWER o

Normal feed breakers to all 480 volt busses CLOSED o

480 bus voltage

- GREATER THAN 420 VOLTS Perform the following:

a. IF any AC emergency bus normal feed breaker
open, THEN ensure associated D/G breaker closed.
b. Perform the following, as necessary:

o Emergency D/G output breakers OPEN

1) Close non-safeguards bus tie breakers:

~ Bus 13 to Bus 14 tie

~ Bus 15 to Bus 16 tie

2) Place t:he following pumps in PULL STOP:

~ EH pumps

~ Turning gear oil pump

~ HP seal oil backup pump

3) Restore power to MCCs.

~ A from Bus 13

~ B from Bus 15

~

E from Bus 15

~ F from Bus 15 4)

WHEN bus 15 restored, THEN reset control room lighting.

5) Refer to Attachment SI/UV for other equipment lost with loss of offsite power.
c. Try to restore offsite power to all AC busses (Refer to ER-ELEC.1, RESTORATION OF OFFSITE POWER).

EOP:

ECA-2.1 T1TLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REVS 9

PAGE 23 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED CAUTION IF RCP SEAL COOLING HAD PREVIOUSLY BEEN LOST, THEN THE AFFECTED RCP SHOULD NOT BE STARTED PRIOR TO A STATUS EVALUATION.

32 Check RCP Status AT LEAST ONE RUNNING Try to start one RCP:

a. Establish conditions for starting an RCP.

o Bus 11A or 11B energized o

Refer to Attachment RCP START.

b. Start one RCP.

IF an RCP can NOT be started, THEN verify natural circulation (Refer to Attachment NC).

IF natural circulation can NOT be

verified, THEN increase feed flow or dumping steam.

EOP:

ECA-2. 1 TIILE:

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9 PAGE 24 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED NOTE:

Adverse CNMT conditions or loss of forced air cooling may result in failure of NIS detectors.

33 Check If Source Range Detectors Should Be Energized:

a.

Source range channels'-

.DEENERGIZED a.

Go to Step 33e.

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.
2) Continue with Step 34.

WHEN flux is LESS.THAN 10 amps on any operable

channel, THEN do Steps
33c, d and e.

c.

Check the following:

o Both intermediate range channels

- LESS THAN 10 10 AMPS

c. Continue with step 34.

WHEN either condition met, THEN do Steps 33d 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 34.
e. Transfer Rk-45 recorder to one source range and one intermediate range channel.

EOP:

ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 9

PAGE 25 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 34 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)

EOP:

ECA-2. 1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 26,of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 35 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:
1) Check IA to CNMT - AVAILABLE 1)

Go to Step 36.

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-2. 1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 27 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 36 Maintain Plant Conditions STABLE Control plant systems as necessary to maintain conditions stable.

o RCS pressure o

PRZR level o

RCS temperatures

  • 37 Monitor SI Reinitiation Criteria:

a.

RCS subcooling based on core exit T/Cs GREATER THAN O' USING FIGURE MIN SUBCOOLING

a. Manually operate SI pumps as necessary.

Return to Step 2.

b.

PRZR level -

GREATER THAN 5S (30$ adverse CNMT]

b. Control charging flow to maintain PRZR level.

IF PRZR level can NOT be maintained, THEN manually operate SI pumps as necessary.

Return to Step 2.

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ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 9

PAGE 28 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 38 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.

Go to Step 39.

o PRZR level - GREATER THAN 5%

[30% 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-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 29 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 39 Check RCS Hot Leg Control feed flow and dump steam to Temperatures LESS THAN 350'F establish RCS cooldown rate less than 100'F/hr in RCS cold legs.

NOTE:

o If auxiliary spray is in use, spray flow may be increased by closing normal charging valve AOV-294 and normal PRZR spray valves.

o When using PRZR PORV, select one with operable block valve.

40 Check RCS Pressure LESS THAN 400 PSIG

[300 PSIG adverse CNMT]

Use normal PRZR spray.

IF normal spray'OT available and letdown is in service, THEN use auxiliary spray.

IF NOT, THEN use one PRZR PORV.

IF IA NOT available, THEN refer to Attachment N2 PORVS.

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ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 30 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 41 Check If RHR Normal Cooling Can Be Established:

a.

RCS cold leg temperature

- LESS THAN 350'F

a. Return to Step 37 RCS pressure

- LESS THAN 400 psig (300 psig adverse CNMTj

c. Place letdown pressure controller (PCV-135) in MANUAL CLOSED
b. Return to Step 40.

d.

Check following valves OPEN

~ AOV-371, letdown isolation valve

~ AOV-'427, loop B cold leg to REGEN Hx

~ At least one letdown orifice valve (AOV-200A, AOV-2008, or AOV-202)

d. Perform the following:
1) Reset both trains of XY relays for AOV-371 and AOV-427.
2) Open AOV-371 and AOV-427.
3) Open one letdown orifice valve.
e. Verify pressure on PI-135

- LESS THAN 400 PSIG

e. Return to Step 40.
f. Place RCS overpressure protection system in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)
g. Establish RHR normal cooling (Refer. to Attachment RHR COOL)
f. 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.

4 I'

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UNCONTROLLED DEPRESSURZZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 31 of 31 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 42 Continue RCS Cooldown To Cold Shutdown:

a. Maintain cool'down rate in RCS cold legs

- LESS THAN 100'F/HR b.

Check narrow range level in both S/Gs LESS THAN 50%

b. Control feed flow to maintain

'arrow range level less than 50%

in both S/Gs.

43 Check Core Exit T/Cs LESS THAN 200'F Return to Step 42.

44 Evaluate Long Term Plant Status:

a. Maintain cold shutdown conditions
b. Consult TSC

-END-

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TITLE:

UNCONTROLLED DEPRESSURIZATION.OF BOTH STEAM GENERATORS REV 9

PAGE 1 of 1 ECA-2. 1 APPENDIX LIST TITLE PAGES 1)

RED PATH

SUMMARY

2)

FIGURE MIN SUBCOOLING 3)

ATTACHMENT FAULTED S/G 4)

ATTACHMENT CNMT RECIRC FANS 5)

ATTACHMENT NC 6)

ATTACHMENT RCP START 7)

ATTACHMENT N2 PORVS 8)

ATTACHMENT SEAL COOLING 9)

ATTACHMENT SI/UV 10)

ATTACHMENT D/G STOP 11)

ATTACHMENT SD-1 12)

ATTACHMENT SD-2 13)

ATTACHMENT RHR COOL 14)

ATTACHMENT AUX BLDG SW 15)

FOLDOUT

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ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 9

PAGE 1 of 1 RED PATH

SUMMARY

a.

SUBCRITICALITY Nuclear power greater than 5~

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

[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

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ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 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 ADVERSE CNHT NORMAL CNHT INADEQUATE SUBCOOLING REGION TEMPERATURE INCREMENTS 10'F 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('F)

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ECA-2.1 TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:

9 PAGE 1 of 1 FOLDOUT PAGE 1.

SI REINITIATION CRITERIA Manually operate SI pumps as necessary if EITHER condition listed below occurs:

o RCS subcooling based on core exit TCs LESS THAN O'F USING REQUIREMENTS OF FIGURE MIN SUBCOOLING o

PRZR level CHARGING CAN NOT CONTROL LEVEL GREATER THAN 5%

[304 ADVERSE CNMT]

2.

E-2 TRANSITION CRITERIA IF any S/G pressure increases at any time, THEN go to E-2, FAULTED STEAM GENERATOR ISOLATION, Step 1.

3.

COLD LEG RECIRCULATION SWITCHOVER CRITERION IF RWST level decreases to less than 28%,

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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