eop: rev uncontrolled depressurization of both … · eop: eca-2.1 title: uncontrolled...

EOP:

ECA-2.1

TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEAMGENERATORS

REV 9

PAGE 1 of 31

ROCHESTER GAS AND ELECTRIC CORPORATION

GXNNA STATION

CONTROLLED COPY NUMBER

TECHNICAL REVIEW

PORC REVIEW DATE

PLANT SUPERINTENDENT

7 CjEFFECTIVE DATE

CATEGORY 1.0

REVIEWED BY:

( 9404I,90158 940414PDR ADDCK 05000244P

, PDR

I >,.f ri

EOP:

ECA-2.1

TITLE:


REV0 9

PAGE 2 of 31

A. PURPOSE — This procedure provides actions to mitigateand minimize a loss of secondary coolant from bothsteam 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 steamgenerators occurs.

EOP:

ECA-2.1

TITLE:


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 STEAMSUPPLY 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 ANDCLASSIFICATION).

o Adverse CNMT values should be used whenever CNMT pressure $ sgreater than 4 psig or CNMT radiation is greater than 10+O~ R/hr.

1 Check Secondary PressureBoundary:

o MSIVs - CLOSED

o MFW flow control valves - CLOSED~ MFW regulating valves~ MFW bypass valves

o MFW pump discharge valvesCLOSED

o S/G blowdown and sample valvesCLOSED

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 isolateS/Gs (Refer to AttachmentFAULTED S/G)

Manually close valves one loop at atime.

IF valves can NOT be closed, THENdispatch AO to locally isolateflowpaths, as necessary, one loopat a time.

EOP:

ECA-2.1

TITLE:


REV: 9

PAGE 4 of 31


* * * * * * * * * * * * * * * * * * * * * * * * * * * * *, * * * * * * * * * * * *CAUTION

A MINIMUM FEED FLOW OF 50 GPM MUST BE MAINTAINED TO EACH S/G WITH A NARROWRANGE LEVEL LESS THAN 5% [25% ADVERSE CNMT].

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

2 Control Feed Flow To MinimizeRCS Cooldown:

a. Check cooldown rate in RCS coldlegs - LESS THAN 100'F/HR

b.- Check narrow range level in bothS/Gs - LESS THAN 50%

c. Check RCS hot leg temperatures «STABLE OR DECREASING

a. Decrease feed flow to 50 gpmto'ach

S/G and go to Step 2c.

b. Control feed flow to maintainnarrow range level less than 50%in both S/Gs.

c. Control feed flow or dump steamto stabilize RCS hot legtemperatures.

3 Check If RCPs Should BeStopped:

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:


REV: 9

PAGE 5 of 31


4 Check CST Level — GREATERTHAN 5 FEET

Switch to alternate AFW suctionsupply (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 CLOSEDAFTER PRESSURE DECREASES TO LESS THAN 2335 PSIG (REFER TO STEP 5B).

* 5 Monitor PRZR PORVs And BlockValves:

a. Power to PORV block valves-AVAILABLE

b. PORVs - CLOSED

a. Restore power to block valvesunless block valve was closed toi,solate an open PORV:

~ MOV-515, MCC C position 6C~ MOV-516, MCC D position 6C

b. IF PRZR pressure less than2335 psig, THEN manually closePORVs.

IF any PORV can NOT be closed,THEN manually close its blockvalve. IF block valve can NOTbe closed, THEN dispatch AO tolocally 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 itwas closed to isolate an openPORV.

EOP:

ECA-2. 1

TITLE:


REV: 9

PAGE 6 of 31


6 Check Secondary RadiationLevels — NORMAL

o Steamline radiation monitor(R-31 and R-32)

o Dispatch AO to locally checksteamline radiation

Go to E-3, STEAM GENERATOR TUBERUPTURE, Step l.

o Request HP sample S/Gs foractivity

* * * * * * * * * * * * * * * * * % * * * * * * * * * * * * * * * * * * * * * * *CAUTION

IF OFFSITE POWER IS LOST AFTER SI RESET, THEN SELECTED SW PUMPS AND ONE CCWPUMP WILL AUTO START ON EMERGENCY D/G. MANUAL ACTION WILL BE REQUIRED TORESTART SAFEGUARDS EQUIPMENT.

7 Reset SI

EOP:

ECA-2.1

TITLE:


REV: 9

PAGE 7 of 31


* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *CAUTION

RCS PRESSURE SHOULD BE MONITORED. IF RCS PRESSURE DECREASES TO LESS THAN250 PSIG [465 PSIG ADVERSE CNMT], THEN THE RHR PUMPS MUST BE MANUALLYRESTARTED TO SUPPLY WATER TO THE RCS.

8 Check If RHR Pumps Should BeStopped:

a. RHR pumps - ANY RUNNING

b. Check RCS Pressure:

a. Go to Step 9.

1) Pressure - GREATER THAN250 psig [465 psig adverseCNMT)

2) Pressure - STABLE ORINCREASING

1) Go .to E-l, LOSS OF REACTOR ORSECONDARY COOLANT, Step 1.

2) Go to Step 9.

c. Stop RHR pumps and place in AUTO

EOP:

ECA-2.1

TITLE:


REV: 9

PAGE 8 of 31


* 9 Monitor If CNMT Spray ShouldBe Stopped:

a. CNMT spray pumps - RUNNING

b. Check the following:

o CNMT pressure - LESS THAN4 PSIG

a. Go to Step 10.

b. Continue with Step 10. WHENBOTH conditions satisfied, THENdo Steps 9c through f.

o Sodium hydroxide tank level-LESS THAN 55%

c. Reset CNMT spray

d. Check NaOH tank outlet valvesCLOSED

~ AOV-836A~ AOV-836B

d. Place NaOH tank outlet valvecontrollers to MANUAL and closevalves.


e. Stop CNMT spray pumps and placein AUTO

f. Close CNMT spray pump dischargevalves

~„MOV-860A~ MOV-860B~ MOV-860C~ MOV-860D

EOP:

ECA-2.1

TITLE:


REV: 9

PAGE 9 of 31


10 Check RWST Level — GREATERTHAN 28%

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

11 Reset CI:

a. Depress CI reset pushbutton

b. Verify annunciator A-26, CNMTISOLATION - 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 powersupply permits (258 kw each).

IF less than two SW pumpsrunning, THEN perform thefollowing:

1) Ensure SW isolation.

b. Dispatch AO to establish normalshutdown alignment (Refer toAttachment SD-1)

2) Dispatch AO to establishnormal shutdown alignment(Refer to Attachment SD-1)

3) Go to Step 14.

EOP:

ECA-2.1

TITLE:


REV: 9

PAGE 10 of 31


13 Establish IA to CNMT:a. Verify non-safeguards busses

energized from offsite powero Bus 13 normal feed - CLOSED

-OR-

o Bus 15 normal feed - CLOSED

b. Verify SW isolation valves toturbine building - OPEN~ MOV-4613 and MOV-4670~ MOV-4614 and MOV-4664

c. Verify at least two aircompressors - RUNNING

d. Check IA supply:

o Pressure - GREATER THAN60 PSIG

o Pressure - STABLE ORINCREASING

e. Reset both trains of XY relaysfor IA to CNMT AOV-5392

f. Verify IA to CNMT AOV-5392 - OPEN

a. Perform the following:

1) Close non-safeguards bus tiebreakers:~ Bus 13 to Bus 14 tie~ Bus 15 to Bus 16 tie

2) Verify adequate emergency D/Gcapacity to run aircompressors (75 kw each).

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

3) WHEN bus 15 restored, THENreset control room lighting.

b. Manually align valves.

c. Manually start air compressors's

power supply permits (75'kweach). IF air compressors canNOT be started, THEN dispatch AOto locally reset compressors asnecessary.

d. Perform the following:

1) Continue attempts to restoreIA (Refer to AP-IA.1, LOSS OFINSTRUMENT AIR).

2) Continue with Step 14. WHENIA restored, THEN do Steps13e and f.

EOP:

ECA-2.1

TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEANGENERATORS

REV: 9

PAGE ll of 31


14 Check If SI ACCUMs Should, BeIsolated:a. Both RCS hot leg temperatures

LESS THAN 400'Fa. Go to Step 15.

b. Dispatch AO with locked valvekey to locally close breakersfor 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 forMOV-841 and MOV-865

c. Vent any unisolated ACCUMs:

1) Open vent valves forunisolated SI ACCUMs,

~ ACCUM A, AOV-834A~ ACCUM B> AOV-834B

2) Open HCV-945.

15 Check Normal Power AvailableTo Charging Pumps:

o Bus 14 normal feed breaker-CLOSED

o Bus 16 normal feed breaker-CLOSED

Verify adequate emergency D/Gcapacity to run charging pumps(75 kw each).

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

ECA-2.1

TITLE:


REV 9

PAGE 12 of 31


16 Check If Charging Flow HasBeen Established:

a. Charging pumps - ANY RUNNING a. Perform the following:

1) IF CCW flow is lost to anyRCP thermal barrier OR anyRCP ¹1 seal outlettemperature offscale high,THEN dispatch AO with key toRWST gate to close sealinjection needle valve(s) toaffected RCP:

~ RCP A, V-300A~ RCP B, V-300B

2) Ensure HCV-142 open, demandat Oa.

b, Align charging pump suction toRWST'

LCV-112B - OPEN

o LCV-112C - CLOSED

b. IF LCV-112B can NOT be opened,THEN perform the following:

1) Verify charging pump A NOTrunning and place in PULLSTOP.

c. Start charging pumps asnecessary and adjust chargingflow to restore PRZR level

2) Dispatch AO to locally openmanual charging pump suctionfrom RWST (V-358 located incharging pump room).

3) WHEN V-358 open, THEN directAO to close V-268 to isolatecharging pumps B and C fromVCT (V-268 located incharging pump room).

EOP:

ECA-2.1

TITLE:


REV 9

PAGE 13 of 31


*17 Monitor SI TerminationCriteria:a. SI pumps - ANY RUNNING

b. Check RCS pressure:

o Pressure - GREATER THAN1625 psig [1825 psig adverseCNMT]

o Pressure - STABLE ORINCREASING

a. Go to Step 19.

b. DO NOT stop SI pumps. Performthe following:

1) Energize PRZR heaters andoperate PRZR spray asnecessary to stabilize RCSpressure greater than1625 psig (1825 psig adverseCNMT]

c. RCS subcooling based on coreexit, 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 toStep 2.

d. Do NOT stop SI pumps. Performthe following:

1) IF normal PRZR sprayavailable, THEN try tostabilize RCS pressure withPRZR spray.

2) Return to Step 17a.

18 Stop SI and RHR Pumps AndPlace In Auto

EOP:

ECA-2.1

TI1'LE:


REV 9

PAGE 14 of 31


*19 Monitor SI ReinitiationCriteria:a. RCS subcooling based on core

exit T/Cs - GREATER THAN. O'USING FIGURE MIN SUBCOOLING

a'. Manually operate SI pumps asnecessary and return to Step 2.

b. PRZR level - GREATER THAN 5%[30$ adverse CNMT]

b. Control charging flow tomaintain PRZR level.

IF PRZR level can NOT bemaintained, THEN manuallyoperate SI pumps as necessaryand return to Step 2.

20 Check RCS Hot. LegTemperatures — STABLE ORDECREASING

Control feed flow or dump steam tostabilize RCS hot leg temperatures.

21 Check Narrow Range Level InBoth S/Gs — LESS THAN 504

Control feed flow to maintainnarrow. range level less than 50% inboth S/Gs.

22 Verify Adequate SW Flow ToCCW Hx:

a. Verify at least two SW pumpsRUNNING

b. Verify AUX BLDG SW isolationvalves - OPEN

a. Manually start pumps as powersupply permits (258 kw perpump). IF less than two SWpumps can be operated, THEN goto Step 28.

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

~ MOV-4615 and MOV-4734~ MOV-4616 and MOV-4735

c. Verify CNMT RECIRC fanannunciator C-2, HIGHTEMPERATURE ALARM - EXTINGUISHED

c. Dispatch AO to locally throttleflow to CCW Hx'to between5000 gpm and 6000 gpm total flow.

EOP:

ECA-2.1

TITLE:


REV 9

PAGE 15 of 31


23 Check If Normal CVCSOperation Can Be Established

a. Verify IA restored:

o IA to CNMT (AOV-5392) - OPEN

o IA pressure - GREATER THAN60 PSIG

a. Continue with Step 28. WHEN IArestored, THEN do Steps 23through 27.

b. Verify instrument bus D-ENERGIZED

c. CCW pumps - ANY RUNNING

b. Energize MCC B. IF MCC B NOTavailable, THEN perform thefollowing:

1) Verify MCC A energized.

2) Place instrument bus D onmaintenance supply.

c. Perform the following:

1) IF any RCP 51 seal outlettemperature offscale high,THEN isolate CCW to thermalbarrier 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 anycharging pump running, THEN doSteps 24 through 27.

EOP:

ECA-2.1

TITLE:


REV 9

PAGE 16 of 31


24 Verify PRZR Level — GREATERTHAN 134 I;404 adverse CNMT]

Continue with Step 26. WHEN PRZRlevel'ncreases to greater than 13%[40$ adverse CNMT], THEN do Step 25.

25 Establish Normal Letdown:

a. Verify charging line flow toREGEN Hx - GREATER THAN 20 GPM

b. Place the following switches toCLOSE:

~ Letdown orifice valves(AOV-200A, AOV-200B, andAOV-202)

~ AOV-371, letdown isolationvalve

~ AOV-427, loop B cold leg toREGEN Hx

c. Place letdown controllers inMANUAL at 35% open

~ TCV-130+ PCV-135

d. Reset both trai'ns of ZY relaysfor AOV-371 and AOV-427 "

e. Open AOV-371 and AOV-427

f. Open letdown orifice valves asnecessary

g. Place TCV-130 in AUTO at 105'F

h. Place PCV-135 in AUTO at 250 psig

i. Adjust 'charging pump speed andHCV-142 as necessary

IF RCP seal return has beenestablished, THEN establish excessletdown as follows:

o Place excess letdown divertvalve, AOV-312, to NORMAL.

o Ensure CCW from excess letdownopen, (AOV-745).

o Open excess letdown isolationvalve AOV-310.

o Slowly open HCV-123 to maintainexcess .letdown temperature lessthan 195'F and pressure lessthan 100 psig.

o Adjust charging pump speed asnecessary.

IF RCP seal return NOT established,THEN consult TSC to determine ifexcess letdown should be placed inservice.

EOP:

ECA-2.1

TITLE:

UNCONTROLLED DEPRESSURXZATION OF BOTH STEAMGENERATORS

REV 9

PAGE 17 of 31


'26 Check VCT Makeup System:

a. Adjust boric acid flow controlvalve in AUTO to 9.5 gpm

b. Verify the following:

1) RMW mode selector switch inAUTO

b. Adjust controls as necessary.

2) RMW control armed - RED LIGHTLIT

c. Check VCT level:

o Level '- GREATER THAN 20%

-OR-

o Level - STABLE OR INCREASING

c. Manually increase VCT makeupflow as follows:

1) Ensure BA transfer pumps andRMW pumps running. IF NOT,THEN reset MCC C and MCC D UVlockouts as necessary.

2) Place RMW flow control valveHCV-111 in MANUAL andincrease RMW flow.

3) Increase boric acid flow asnecessary.

EOP:

ECA-2.1

TITLE:

UNCONTROLLED DEPRESSURXZATION OF BOTH STEAMGENERATORS

REV: 9

PAGE 18 of 31


27 Check Charging Pump SuctionAligned To VCT:

a. VCT level - GREATER THAN 208 a. IF VCT level can NOT bemaintained greater than 5%, THENperform the following:

1) Ensure charging pump suctionaligned to RWST

o LCV-112B open

o LCV-112C closed

b. Verify charging pumps aligned toVCT

o LCV-112C - OPEN

o LCV-112B - CLOSED

2) Continue with Step 28. WHENVCT level greater than 40%,THEN do Step 27b

b. Manually align valves asnecessary.

EOP:

ECA-2.1

T1TLE:


REV 9

PAGE 19 of 31


28 Check RCP Cooling:

a. Check CCW to RCPs:

o Annunciator A-7, RCP fA CCWRETURN HIGH TEMP OR LOW FLOW

EXTINGUISHED

Establish normal cooling to RCPs(Refer to Attachment SEAL COOLING).

o Annunciator A-15, RCP 1B CCWRETURN HIGH TEMP OR LOW FLOW

EXTINGUISHED

b. Check RCP seal injection:

o Labyrinth seal D/Ps - GREATERTHAN 15 INCHES OF WATER

-OR-

o RCP seal injection flow toeach RCP - GREATER THAN 6 GPM

EOP:

ECA-2.1

TITLE:

UNCONTROLLED DEPRESSURIZATION OF BOTH STEANGENERATORS

REV: 9

PAGE 20 of 31


29 Check If Seal Return FlowShould Be Established:

a. Verify RCP ¹1 seal outlettemperature - LESS THAN 235'F

b. Verify RCP seal outlet valvesOPEN

a. Go to Step 30.

b. Manually open valves asnecessary.,


c. Reset both trains of XY relaysfor RCP seal return isolationvalve MOV-313

d. Open RCP seal return isolationvalve MOV-313


1) Place MOV-313 switch to OPEN.

e. Verify RCP ¹1 seal leakoff flowLESS THAN 5.5 GPM

f. Verify RCP ¹1 seal leakoff flowGREATER THAN 0 '5 GPM

2) Dispatch AO with key to RWSTgate to locally open MOV-313.

e. IF any RCP seal leakoff flowgreater than 5.5 gpm THEN:

o Close the affected RCP sealdischarge val~e

~ RCP A, AOV-270A~ RCP B,, AOV-270B

o Trip the affected RCP

IF both RCP seal dischargevalves are shut, THEN go toStep 30.

f. Refer to AP-RCP.1, RCP SEALMALFUNCTION.

EOP:

ECA-2. 1

Z!TLE:


REV: 9

PAGE 21 of 31


NOTE: o If auxiliary spray is in use, spray flow may be increased byclosing 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 OperateNormal Spray As Necessary ToMaintain RCS Pressure Stable

IF normal spray NOT available andletdown is in service, THEN useauxiliary spray valve (AOV-296).

IF PRZR spray NOT available, THENuse one PRZR PORV.

IF IA NOT available, THEN refer toAttachment N2 PORVS.

EOP:

ECA-2. 1

TITLE:


REV: 9

PAGE 22 of 31


31. Verify All AC Busses—ENERGIZED BY OFFSITE POWER

o Normal feed breakers to all 480volt busses - CLOSED

o 480 bus voltage - GREATER THAN420 VOLTS

Perform the following:

a. IF any AC emergency bus normalfeed breaker open, THEN ensureassociated D/G breaker closed.

b. Perform the following, asnecessary:

o Emergency D/G output breakersOPEN

1) Close non-safeguards bus tiebreakers:

~ Bus 13 to Bus 14 tie~ Bus 15 to Bus 16 tie

2) Place t:he following pumps inPULL 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, THENreset control room lighting.

5) Refer to Attachment SI/UV forother equipment lost withloss of offsite power.

c. Try to restore offsite power toall AC busses (Refer toER-ELEC.1, RESTORATION OFOFFSITE POWER).

EOP:

ECA-2.1

T1TLE:


REVS 9

PAGE 23 of 31


* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *CAUTION

IF RCP SEAL COOLING HAD PREVIOUSLY BEEN LOST, THEN THE AFFECTED RCP SHOULDNOT BE STARTED PRIOR TO A STATUS EVALUATION.

32 Check RCP Status — AT LEASTONE RUNNING

Try to start one RCP:

a. Establish conditions forstarting 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, THENverify natural circulation (Referto Attachment NC).

IF natural circulation can NOT beverified, THEN increase feed flowor dumping steam.

EOP:

ECA-2. 1

TIILE:


REV: 9

PAGE 24 of 31


NOTE: Adverse CNMT conditions or loss of forced air cooling may result infailure of NIS detectors.

33 Check If Source RangeDetectors Should Be Energized:

a. Source range channels'-.DEENERGIZED

a. Go to Step 33e.

b. Check intermediate range flux-EITHER CHANNEL LESS THAN10 10 AMPS


1) IF neither intermediate rangechannel is decreasing THENinitiate boration.

2) Continue with Step 34. WHENflux is LESS .THAN 10 ampson any operable channel, THENdo Steps 33c, d and e.

c. Check the following:

o Both intermediate rangechannels - LESS THAN10 10 AMPS

c. Continue with step 34. WHENeither condition met, THEN doSteps 33d and e.

-OR-

o Greater than 20 minutes sincereactor trip

d. Verify source range detectorsENERGIZED

d. Manually energize source rangedetectors by depressing P-6permissive defeat pushbuttons (2of 2).

IF source ranges can NOT berestored, THEN refer toER-NIS.1, SR MALFUNCTION and goto Step 34.

e. Transfer Rk-45 recorder to onesource range and oneintermediate range channel.

EOP:

ECA-2.1

TITLE:


REV 9

PAGE 25 of 31


34 Check If Emergency D/GsShould Be Stopped:

a. Verify 'AC emergency bussesenergized by offsite power:

o Emergency D/G output breakersOPEN

a. Try to restore offsite power(Refer to ER-ELEC.1, RESTORATIONOF OFFSITE POWER).

o AC emergency bus voltage-GREATER THAN 420 VOLTS

o AC emergency bus normal feedbreakers - CLOSED

b. Stop any unloaded emergency D/Gand place in standby (Refer toAttachment D/G STOP)

EOP:

ECA-2. 1

TITLE:


REV: 9

PAGE 26,of 31


35 Establish Normal ShutdownAlignment'.:

a. Check condenser - AVAILABLE a. Dispatch AO to performAttachment SD-2.


o Open generator disconnects

~ 1G13A71~ 9X13A73

o Place voltage regulator to OFF

o Open turbine drain valves

o Rotate reheater steam supplycontroller cern to close valves

o Place reheater dump valveswitches to HAND

o Stop all but one condensatepump

c. Verify adequate Rx head cooling:

1) Check IA to CNMT - AVAILABLE 1) Go to Step 36.

2) Verify at least one controlrod shroud fan - RUNNING

2) Manually start one fan aspower supply permits (45 kw)

3) Verify one Rx compartmentcooling fan - RUNNING

3) Perform the following:

o Dispatch AO to reset UVrelays at MCC C and MCC D.

o Manually start one fan aspower supply permits(23 kw)

d. Verify Attachment SD-1 - COMPLETE

EOP:

ECA-2. 1

TITLE:


REV: 9

PAGE 27 of 31


36 Maintain Plant Conditions—STABLE

Control plant systems as necessaryto maintain conditions stable.

o RCS pressure

o PRZR level

o RCS temperatures

*37 Monitor SI ReinitiationCriteria:a. RCS subcooling based on core

exit T/Cs - GREATER THAN O'USING FIGURE MIN SUBCOOLING

a. Manually operate SI pumps asnecessary. Return to Step 2.

b. PRZR level - GREATER THAN 5S(30$ adverse CNMT]

b. Control charging flow tomaintain PRZR level.

IF PRZR level can NOT bemaintained, THEN manuallyoperate SI pumps as necessary.Return to Step 2.

EOP:

ECA-2.1

TITLE:


REV 9

PAGE 28 of 31


38 Check If SI ACCUMs Should BeIsolated:

a. Check the following:

o RCS subcooling based on coreexit 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 valvekey to locally close breakersfor 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 forunisolated SI ACCUMs.

d. Locally reopen breakers forMOV-841 and MOV-865

~ ACCUM A, AOV-834A+ ACCUM B, AOV-834B

2) Open HCV-945.

EOP:

ECA-2.1

TITLE:


REV: 9

PAGE 29 of 31


39 Check RCS Hot Leg Control feed flow and dump steam toTemperatures — 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 byclosing 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 — LESSTHAN 400 PSIG [300 PSIGadverse CNMT]

Use normal PRZR spray.

IF normal spray'OT available andletdown is in service, THEN useauxiliary spray.

IF NOT, THEN use one PRZR PORV.

IF IA NOT available, THEN refer toAttachment N2 PORVS.

EOP:

ECA-2.1

TITLE:


REV: 9

PAGE 30 of 31


41 Check If RHR Normal CoolingCan Be Established:

a. RCS cold leg temperature - LESSTHAN 350'F

a. Return to Step 37'.

RCS pressure - LESS THAN400 psig (300 psig adverse CNMTj

c. Place letdown pressurecontroller (PCV-135) in MANUALCLOSED

b. Return to Step 40.

d. Check following valves - OPEN

~ AOV-371, letdown isolationvalve

~ AOV-'427, loop B cold leg toREGEN Hx

~ At least one letdown orificevalve (AOV-200A, AOV-2008, orAOV-202)


1) Reset both trains of XYrelays for AOV-371 andAOV-427.

2) Open AOV-371 and AOV-427.

3) Open one letdown orificevalve.

e. Verify pressure on PI-135 - LESSTHAN 400 PSIG

e. Return to Step 40.

f. Place RCS overpressureprotection system in service(Refer to 0-7, ALIGNMENT ANDOPERATION OF THE REACTOR VESSELOVERPRESSURE PROTECTION SYSTEM)

g. Establish RHR normal cooling(Refer. to Attachment RHR COOL)

f. IF RCS overpressure protectionsystem can NOT be placed inservice, THEN notify TSC ofpotential Tech Spec violation ifRHR system is placed in service.

EOP:

ECA-2.1

TITLE:

UNCONTROLLED DEPRESSURZZATION OF BOTH STEAMGENERATORS

REV: 9

PAGE 31 of 31


42 Continue RCS Cooldown To ColdShutdown:

a. Maintain cool'down rate in RCScold legs - LESS THAN 100'F/HR

b. Check narrow range level in bothS/Gs - LESS THAN 50%

b. Control feed flow to maintain'arrowrange level less than 50%

in both S/Gs.

43 Check Core Exit T/Cs — LESSTHAN 200'F

Return to Step 42.

44 Evaluate Long Term PlantStatus:

a. Maintain cold shutdown conditions

b. Consult TSC

-END-

EOP: TITLE:

UNCONTROLLED DEPRESSURIZATION.OF BOTH STEAMGENERATORS

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

EOP:

ECA-2.1

TITLE:


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 ANDRVLIS level (no RCPs) less than 434 [464adverse CNMT]

c. HEAT SINK — Narrow range level in all S/Gs less than 54[25% adverse CNMT] AND total feedwater flowless than 200 gpm

d. INTEGRITY — Cold leg temperatures decrease greater than100'F in last 60 minutes AND RCS cold legtemperature less than 285'F

e. CONTAINMENT — CNMT pressure greater than 60 psig

EOP:

ECA-2.1

TITLE:


REV: 9

PAGE 1 of 1

FIGURE MIN SUBCOOLING

NOTE Subcooling Margin = Saturation Temperature From FigureBelow [-] 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 PRESSUREINCREMENTS 20 PSIG

SUBCOOLEDREGION

ADVERSE CNHT

NORMAL CNHT

INADEQUATESUBCOOLING

REGION

TEMPERATUREINCREMENTS 10'F

200 250 300 350 400 450 500 550 600 650 700

CORE EXIT SATURATION TEMPERATURE ('F)

EOP:

ECA-2.1

TITLE:


REV: 9

PAGE 1 of 1

FOLDOUT PAGE

1. SI REINITIATION CRITERIA

Manually operate SI pumps as necessary if EITHER conditionlisted 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 toE-2, FAULTED STEAM GENERATOR ISOLATION, Step 1.

3. COLD LEG RECIRCULATION SWITCHOVER CRITERION

IF RWST level decreases to less than 28%, THEN go toES-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 toalternate AFW water supply (Refer to ER-AFW.1, ALTERNATE WATERSUPPLY TO AFW PUMPS) .

eop: rev uncontrolled depressurization of both … · eop: eca-2.1 title: uncontrolled...

Documents