ML17262A165
| ML17262A165 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 08/29/1990 |
| From: | Marlow T ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17262A163 | List: |
| References | |
| FR-H.1, NUDOCS 9010020147 | |
| Download: ML17262A165 (100) | |
Text
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FR-H.1 TITLE:
RESPONSE
TO LOSS OF SECONDARY HEAT SINK REV 9
PAGE 1 of 25 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE PLANT SUPERINTENDENT EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
~l 9@10020 C< 050002<4 147 900921 p>R
&DOC PDC P
GINNASTATION START:
DATE TIME Cohtpf ETEg.
DATE TIME:
I R
FR-H.1
RESPONSE
TO LOSS OF SECONDARY HEAT SINK REV:
9 PAGE 2 of 25 A.
PURPOSE This procedure provides actions for responding to a loss of secondary heat sink in both S/Gs.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from:
a.
E-O, REACTOR TRIP OR SAFETY INJECTION, when minimum AFW flow is not verified.
b.
F-O.3, HEAT SINK Critical Safety Function Status Tree on a RED condition.
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RESPONSE
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9 PAGE 3 of 25 STEP ACTION/EXPECTED RESPONSE
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NOT OBTAINED CAUTION o
IF TOTAL FEED FLOW IS LESS THAN 200 GPM DUE TO OPERATOR ACTION, THIS PROCEDURE SHOULD NOT BE PERFORMED.
o PEED FLOW SHOULD NOT BE REESTABLISHED TO A FAULTED S/G IP A NON-FAULTED S/G IS AVAILABLE.
NOTE:
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 If Secondary Heat Sink Is Required:
a.
RCS pressure
- GREATER THAN ANY NON-FAULTED S/G PRESSURE b.
Check the following:
o RCS cold leg temperature-GREATER THAN 350'F o
RCS pressure
- GREATER THAN 400 psig t300 psig adverse CNMT]
IP RWST level less than 28X, THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step l.
- b. Try to place RHR System in service while continuing with this procedure:
- 1) Reset SI if necessary.
- 2) Place letdown pressure controller in MANUAL CLOSED.
- 3) Check the 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-200B, or AOV-202)
- 4) IF pressure on PI-135 less ttIan 400 psig, THEN establish RHR normal cooling (Refer to Attachment RHR COOL).
IF adequate cooling with RHR system established, THEN return to procedure and step in effect.
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RESPONSE
NOT OBTAINED 2
Monitor Secondary Heat Sink:
o Verify both S/G wide range levels -
GREATER THAN 35.inches
[110 inches adverse CNMT]
o Verify PRZR pressure
- LESS THAN 2335 PSIG Perform the following:
- a. Trip both RCPs.
b.
Go to Step 11 to initiate bleed and feed cooling.
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PAGE 5 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 3
Try to Establish AFW Flow To At Least One S/G:
a.
Check MCB indications for cause of APW failure:
- 1) Verify CST level - GREATER THAN 5 PERT
- 2) Verify busses supplying power to MDAPW pumps
- ENERGIZED
~ Bus 14
~ Bus 16
- 3) Check AFW valve alignment o
AFW pump discharge valves OPEN
~ MOV-4007
~ MOV-4008
~ MOV-3996 o
TDAFW pump flow control valves -
OPEN
~ AOV-4297
~ AOV-4298
- b. Check APW pumps
- ALL RUNNING c.
Check total flow to S/Gs-
'REATER THAN 200 GPM
- d. Return to procedure and step in effect
- 1) Refer to ER-APW.l, ALTERNATE WATER SUPPLY TO APW PUMPS.
- 2) Continue attempts to restore power to MDAFW pumps.
- 3) Dispatch AO to locally align valves as necessary.
- b. Perform the following:
- 1) Manually start MDAFW pumps.
- 2) Check TDAPW pump steam supply valves OPEN.
~ MOV-3504A o MOV-3505A
- c. Continue attempts to restore AFW flow and go to Step 4.
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NOT OBTAINED 4
Stop Both RCPs
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PAGE 7 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF OFFSITE POWER IS LOST APTER SI RESET, SELECTED SW PUMPS AND ONE CCW PUMP VILL AUTO START ON EMERGENCY D/G.
MANUAL ACTION VILL BE REQUIRED TO RESTART SAFEGUARDS EQUIPMENT.
5 Try To Establish MFW Flow To
. At Least One S/G:
a.
Check condensate system:
o Condensate pump - ANY RUNNING o
MPW pump suction pressure-GREATER THAN 185 PSIG
- b. Reset SI if necessary
- c. Reset feedwater isolation
- d. Establish MFV flov:
- 1) Check MFV pump discharge valves -
CLOSED
- 2) Verify MFV flow control bypass valve - OPERABLE
- 4) Verify S/G blovdown key svitches in NORMAL
- 5) Ensure one MPV pump recirc valve -
OPEN
- 6) Start selected MFV pump
- 7) Open MPW pump discharge valve
- 8) Open MPW flow control bypass valves as necessary to restore S/G level e.
Go to Step 9
- a. IF offsite power available, THEN try to place condensate system in service.
IF NOT, THEN go to Step 6.
- d. IF MFV flov can NOT be established, THEN go to Step 6.
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PAGE 8 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6 Establish SAFW Flow:
- a. Perform the following:
- 1) Align SAFW system for operation (Refer to Attachment SAFW)
- 2) Start both SAFW pumps
- 3) Verify SAFW total flow-GREATER THAN 200 GPM
- a. IF greater than 200 gpm, total SAFW flow can NOT be established, THEN go to Step 7.'.
Go to Step 9
CAUTION IF S/G WIDE RANGE LEVEL DECREASES TO LESS THAN 35 INCHES [110 INCHES ADVERSE CNMT] OR IF PRZR PRESSURE INCREASES TO GREATER THAN'335 PSIG, THEN STEPS ll through 13 SHOULD BE IMMEDIATELYINITIATED FOR BLEED AND FEED.
7 Establish Condenser Steam Dump Pressure Control:
- a. Verify condenser available:
o Any MSIV -
OPEN o
Annunciator G-15, STEAM DUMP
- LIT a.
Place S/G ARV controllers in AUTO at desired pressure and go to Step 8.
- b. Ad)ust condenser steam dump controller HC-484 to desired pressure and verify in AUTO
- c. Place steam dump mode selector switch to MANUAL
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NOT OBTAINED CAUTION FOLLOWING BLOCK OP AUTOMATIC SI ACTUATION, MANUAL SI ACTUATION MAY BE REQUIRED IP CONDITIONS DEGRADE.
NOTE: If auxiliary spray is in use, spray flow may be increased by closing normal charging valve AOV-294 and normal PRZR spray valves.
8 Try To Establish Feed Flow From Condensate System:
a.
Check condensate pumps
- ANY RUNNING
- b. Establish condensate flowpath (Refer to Attachment COND TO S/G)
- c. Depressurize RCS to less than 1950 psig:
- 1) Deenergize PRZR heaters.
- 2) Check letdown - IN SERVICE
- 3) Depressurize using auxiliary spray valve (AOV-296) d.
WHEN RCS pressure less than 1950 psig, THEN perform the following:
- 1) Block SI 2)
Dump steam to condenser at maximum rate to depressurize at least one S/G'o less than 380 psig
- e. Verify condensate flow to S/Gs
- a. IP offsite power available, THEN manually start at least one condensate pump.
IF a condensate pump can NOT be
- started, THEN go to Step 10.
b.
Go to Step 10.
- 2) Use one PRZR PORV.
IF IA NOT available, THEN refer to Attachment
~N PORVS.
IP PORV NOT available, THEN use auxiliary spray valve, AOV-296 and go to Step 8d.
- 2) Manually or locally dump steam using intact S/G ARV.
e.
Go to Step 10.
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.TITLE:
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RESPONSE
NOT OBTAINED 9
Check S/G Levels:
- a. Narrow range level in at least one S/G - GREATER THAN 5%
[25%
adverse CNMT]
- b. Return to procedure and step in effect
- a. IF feed flow verified to at least one S/G, THEN maintain flow to restore narrow range level greater than 5%
[25%
adverse CNMT].
IF NOT verified, THEN go to Step 10.
10 Verify Secondary Heat Sink:
a.
Check the following:
o Both S/G wide range levels-GREATER THAN 35 inches
[110 inches adverse CNMT]
o PRZR pressure
- LESS THAN 2335 PSIG a.
Perform the following:
- 1) Trip both RCPs.
2)
Go to Step ll to initiate bleed and feed cooling.
- b. Return to Step 1
CAUTION STEPS 11 THROUGH 13 MUST BE PERFORMED QUICKLY IN ORDER TO ESTABLISH RCS HEAT REMOVAL BY RCS BLEED AND FEED.
11 Actuate SI and CI
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9 PAGE ll of 25 STEP
'CTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION WHEN BAST LEVEL DECREASES TO 10%,
THEN SI PUMP AUTOMATIC SWITCHOVER TO RWST SHOULD BE ENSURED.
12 Verify RCS Feed Path:
a.
Check SI pumps
- AT LEAST ONE RUNNING
- b. Check valve alignment for operating SI pumps PROPER EMERGENCY ALIGNMENT Manually start pumps and align valves as necessary to establish RCS feed path.
XF a feed path can NOT be established, THEN continue attempts to establish feed flow.
Return to Step 3.
13 Establish RCS Bleed Path:
a.
Open both PRZR PORV block valves
- a. Ensure power to MCCs supplying block valves.
~
MCC C for MOV-515
~ MCC D for MOV-516
- b. Place both PRZR PORV switches to OPEN IP any block valve can NOT be
- opened, THEN dispatch AO to locally check breaker:
~ MOV-515, MCC C position 6C
~ MOV-516, MCC D position 6C
- c. Align RCS overpressurization nitrogen system to open both PRZR PORVs (Refer to Attachment N2 PORVS)
- c. IP BOTH PRZR PORVs can NOT be
- opened, THEN perform the following:
- 1) Ensure both PORV switches in OPEN.
2)
Go to Step 14.
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FR-H.l T ITI.E:
RESPONSE
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REV 9
PAGE 12 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IP OFPSITE POWER IS LOST AFTER SI RESET, SELECTED SW PUMPS AND ONE CCW PUMP WILL AUTO START ON EMERGENCY D/G.
MANUAL ACTION WILL BE REQUIRED TO RESTART SAPEGUARDS EQUIPMENT.
14 Check If SI Can Be Reset:
a.
Check the following:
o PRZR pressure
- LESS THAN 1750 PSIG
-OR-o Either steamline pressure-LESS THAN 514 PSIG
- b. Reset SI
- a. IF PRZR pressure stable or increasing, THEN reset SI and go to Step 15.
IP PRZR pressure decreasing, THEN perform the following:
1)
WHEN PRZR pressure less than 1750 psig, THEN reset SI.
2)
Go to Step 15.
15 Reset CI:
- a.
Operate CI reset key switch
- b. Verify annunciator A-26, CONTAINMENT ISOLATION-EXTINGUISHED
- b. Perform the following:
- 1) Reset SI.
- 2) Operate CI reset key switch.
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9 PAGE 13 of 25 STEP ACTION/EXPECTED RESPONSE
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NOT OBTAINED 16 Verify Adequate SW Flow To CCW Hz:
- a. Verify at least two SW pumps-RUNNING
- b. Verify AUX BLDG SW isolation valves
- AT LEAST ONE SET OPEN
~ MOV-4615 and MOV-4734
~ MOV-4616 and MOV-4735
- a. Manually start pumps as power supply permits (258 kw each).
IR less than two SW pumps can be
- operated, THEN go to Step 19.
P I
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NOT OBTAINED 17 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 turbine building SW isolation valves 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
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 as 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.l, LOSS OF INSTRUMENT AIR).
- 2) Continue with Step 19.
WHEN IA restored, THEN do Steps 17e, f and 18.
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PAGE 15 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 18 Restore RCS Overpressurization Nitrogen System To Standby:
- a. Verify instrument bus D-ENERGIZED
- a. Perform the following:
- 1) Ensure steam dump mode control in MANUAL.
- b. Place relief valve PC-431 and PC-430 arming switches to BLOCK
~ SOV-8619A
~ SOV-8619B
- c. Close SURGE TK VLVs
~ SOV-8616A
~ SOV-8616B NOTE:
PRZR PORVs may close temporarily until adequate IA pressure is restored in CNMT.
19 Verify Adequate RCS Bleed Path BOTH PRZR PORVS OPEN IF PRZR PORVs can NOT be opened, THEN perform the following:
a.
Open Rx vessel head vents.
~ SOV-590
~ SOV-591
~ SOV-592
~ SOV-593
- b. Depressurize at least one intact S/G to atmospheric pressure using S/G ARV.-
- c. Align any available low pressure water source to the depressurized S/Gs.
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RESPONSE
NOT OBTAINED CAUTION THE RCS BLEED PATH MUST BE MAINTAINED EVEN IF RCS PRESSURE REMAINS GREATER THAN SI PUMP SHUTOFF HEAD.
20 Maintain RCS Heat Removal:
o Maintain SI flow o
Maintain both PRZR PORVs and block valves OPEN 21 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).
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PAGE 17 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 22 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 gl seal outlet temperature offscale high, THEN dispatch AO with key to RWST gate to locally close seal injection needle valve(s) to affected RCP:
~ RCP A, V-300A
~ RCP B, V-300B
- 2) Ensure HCV-142 open, demand at 0%.
- b. Align charging pump suction to RWST:
o LCV-112B -
OPEN o
LCV-112C -
CLOSED
- b. 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 establish maximum charging flow
- 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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REV 9
PAGE 18 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
IF RWST LEVEL DECREASES TO LESS THAN 28%,
THEN THE SI SYSTEM SHOULD BE ALIGNED FOR COLD LEG RECIRCULATION USING STEPS 1
THROUGH 13 OF ES-1.3, TRANSFER TO COLD LEG RECIRCULATION.
o IF CONTAINMENT PRESSURE INCREASES TO GREATER THAN 28 PSIG, CONTAINMENT SPRAY SHOULD BE VERIFIED.
23 Continue Attempts To Establish Secondary Heat Sink In At Least One S/G:
~ AFW flow
~ Main FW flow
~ Standby AFW flow
~ Condensate flow 24 Check For Adequate Secondary Heat Sink:
a.
Check narrow range level in at least one S/G - GREATER THAN 5%
(25% adverse CNMT]
- b. Adjust S/G ARV controllers to existing S/G pressure
- a. Return to Step 23.
'I 0
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PAGE 19 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF THE RCS IS WATER SOLID, THEN ANY INCREASE IN RCS TEMPERATURE MAY RESULT IN A SIGNIFICANT RCS PRESSURE INCREASE.
RCS HEATUP SHOULD BE PREVENTED.
25 Monitor RCS Temperatures:
o Core exit T/Cs - DECREASING o
RCS hot leg temperatures-DECREASING Perform the following:
- a. Control steam dump and feed flow to establish natural circulation and stabilize RCS temperature.
- b. Return to Step 23.
26 Check CCW Pumps ANY RUNNING Perform the following:
- a. IF any RCP fl 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
- b. Manually start one CCW pump (124 kw).
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PAGE 20 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF RCS IS SOLID, THEN TERMINATION OP PEED AND BLEED MAY RESULT IN RAPID RCS PRESSURE INCREASE UNLESS RCS INFLOV AND OUTFLOW ARE CAREFULLY CONTROLLED.
27 Check If One Of Three SI Pumps Should Be Stopped:
- a. Three SI pumps - RUNNING b.
RCS subcooling based on core exit T/Cs - GREATER THAN 35'F
[90'F adverse CNMT] USING FIGURE MIN SUBCOOLING c.
Check PRZR level, - GREATER THAN 13%
[40% adverse CNMT]
d.
Stop one SI pump a.
Go to Step 28.
b.
Check the following:
o RCS pressure greater than 1625 psig [1825 psig adverse
'NMT]
o RCS subcooling based on core exit T/Cs greater than O' using Figure MIN SUBCOOLING IP NOT, THEN go to Step 30.
c.
Do NOT stop SI pump.
Go to Step 30.
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9 PAGE 21 of 25 STEP ACTION/EXPECTED RESPONSE
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NOT OBTAINED 28 Check If One Of Two SI,Pumps Should Be Stopped:
a.
Two SI pumps
- RUNNING
- b. Determine required RCS subcooling from table:
a.
Go to Step 29.
Charging Pump Availability
'NONE ONE TVO THREE RCS Subcooling,Criteria 120'F [200'F adverse CNMT]
115'F [190'F adverse CNMT]
105'F [180'F adverse CNMT]
100'F [175'F adverse CNMT]
c.
RCS subcooling based on core exit T/Cs - GREATER THAN VALUE FROM TABLE ABOVE USING FIGURE MIN SUBCOOLING l
d.
PRZR level - GREATER THAN 13%
[40% adverse CNMT]
e.
Stop one SI pump c.
Check the following:
o RCS pressure greater than 1625 psig [1825 psig adverse CNMT]
o RCS subcooling based on core exit T/Cs greater than O' using Figure MIN SUBCOOLING IF NOT, THEN go'to Step 30.
d.
Do NOT stop SI pump.
Go to Step 30.
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NOT OBTAINED 29 Check If Last SI Pump Should Be Stopped:
a.
One SI pump - RUNNING b.
Check the following:
o RCS subcooling based on core exit T/Cs greater than O' using Figure MIN SUBCOOLING o
RCS pressure greater than 1625 psig [1825 psig adverse CNMT]
c.
PRZR level -
GREATER THAN 13%
[40% adverse CNMT]
d.
Stop running SI pump e.
Go to Step 31 a.
Go to Step 31.
b.
Go to Step 30.
c.
Do NOT stop SI pump.
Go to Step 30.
C I
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PAGE 23 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
After closing a PORV, it may be necessary to wait for RCS pressure to increase to permit stopping SI pumps in Steps 27, 28 and 29.
30 Check PRZR PORV Status:
a.
PRZR PORVs - ANY OPEN b.
PRZR PORVs -
BOTH OPEN a.
Close any open Rx vessel head vent valves and go to appropriate plant procedure:
o IF RWST level greater than
- 28X, THEN go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step 1.
-OR-o IF RWST level less than 28X, THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step l.
- b. IF PRZR level greater than 75%
[65% adverse CNMT], THEN perform the following:
- 1) Establish excess letdown as follows:
This Step continued on the next page.
o Place AOV-312 to NORMAL.
o Ensure CCW pump running.
o Ensure CCW from excess letdown Hx open (AOV-745).
o Open excess letdown isolation valve AOV-310.
o Slowly open HCV-123.
- 2) Stop all but one charging pump and decrease charging flow to as necessary to control RCS pressure.
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NOT OBTAINED (Step 30 continued from previous page)
- c. Close one open PRZR PORV
- d. Return to Step 27
- c. Close PORV block valve.
, IF block valve can NOT be
- closed, THEN go to appropriate plant procedure:
o IF RWST level greater than 28%,
THEN go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step l.
-OR-o IF RWST level less than 28%,
THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step l.
CAUTION IF RCS IS SOLID, CLOSURE OF PORVS WILL RESULT IN RAPID RCS PRESSURE INCREASE UNLESS RCS INFLOW AND OUTFLOW ARE CAREFULLY CONTROLLED.
31 Check PRZR PORVs And Rx Close all PRZR PORVs and Rx vessel Vessel Head Vent: Valves ALL head vent valves.
IF any PRZR PORV CLOSED can NOT be closed, THEN manually close its block valve.
0
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PAGE 25 of 25 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 32 Check If RHR Pumps Should Be Stopped:
a.
Check RCS pressure:
- 1) Pressure
- GREATER THAN 250 psig [465 psig adverse CNMT]
- 2) Pressure STABLE OR INCREASING a.
Go to appropriate plant procedure:
o IF RWST level greater than 28%,
THEN go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step 1.
-OR-
- b. Stop RHR pumps and place in AUTO o
IF RWST level less than 28%,
THEN go to ES-1.3, TRANSFER TO COLD'LEG RECIRCULATION, Step 1.
33 Start Charging Pumps As Necessary And Control Charging Flow To Maintain PRZR Level 34 Go To ES 1
1 I SI TERMINATIONI Step 8
-END-
0
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9 PAGE 1 of 1 FR-H.1 APPENDIX LIST TITLE PAGES 1)
FIGURE MIN SUBCOOLING 2)
ATTACHMENT CNMT RECIRC FANS 3)
ATTACHMENT COND TO S/G 4)
ATTACHMENT N2 PORVS 5)
ATTACHMENT SD-1 6)
ATTACHMENT RHR COOL 7)
ATTACHMENT SAFW 8)
ATTACHMENT AUX BLDG SW
8
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RESPONSE
TO LOSS OF SECONDARY HEAT SINK 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 E CNMT ADUERS 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:
ATT TlTlE:
EOP/AP ATTACHMENTS REV:
2 PAGE 1 of 2 ATTACHMENT GEN DEGAS Supt.
I l l~ I>
CAUTION:
OBSERVE ALL NORMAL PRECAUTIONS FOR HANDLING EXPLOSIVE MIXTURES OF HYDROGEN IN AIR.
1.
Close all H2 manifold bottle stops.
o Valve V-6994A o Valve V-6994B o Valve V-6995 o Valve V-6998 2.
Close H2 regulator isolation valve, V-6995X (gas bottle house).
3.
Isolate hydrogen feed by closing valve V-6994K and V-6999C (TURB BLDG below generator).
4.
Connect the C02 feed to the bottom of the generator by opening valve V-6994G.
5.
Open vent from top of generator, valve V-6994J.
6.
Open vent isolation valve, V-6995P, to initiate H2 release through vent line.
7.
Fully open C02 manifold header stop valve, V-6999A (Gas Bottle House).
CAUTION:
DO NOT ALLOW MACHINE PRESSURE TO EXCEED 3
TO 5 PSIG DURING THE TIME C02 IS BEING ADMITTED.
8.
WHEN generator pressure is less than 5 psig, as indicated on PI-2805, THEN open all C02 bottle stops fully to admit C02 to generator.
o Valve V-6993C o Valve V-6999 o Valve V-6999B o Valve V-6998A
I
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K
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ATT EOP/AP ATTACHMENTS REV 2
PAGE.2 of 2 ATTACHMENT GEN DEGAS 9.
Adjust vent isolation V-6995P OR isolate C02 bottles as necessary to maintain 3-5 psig pressure as indicated on PI-2805.
10.
Purge a minimum of 20 C02 cylinders through the generator.
When the purge is complete, the C02 may be shut off by closing the valves in the C02 supply. first, then closing valves V-6999A and V-6994G.
11.
Open the breaker for the DC seal oil backup pump (DC panel S-9 TURB BLDG basement west end breaker position 12).
12.
WHEN conditions permit, THEN refer to T-31.2, REMOVING HYDROGEN WITH C02 REMOVING C02 WITH INSTRUMENT AIR, to complete purging C02 with air.
I"I I
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 1 of 19 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE T SUPERINT ND NT EF EC IVE DATE CATEGORY 1.0 REVIEWED BY:
< ~
1$
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AP-ELEC.1 LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 2 of 19 A-PURPOSE This procedure provides actions to respond to a loss of N12A or 12B SS Transformer from HSD or at power conditions.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure may be entered from:
a.
AP-TURB.1, when busses 12A and/or 12b are found to be deenergized.
2.
SYMPTOMS The symptoms of loss of N12A or 12B SS Transformer are:
a.
Annunciator L-20, 12A XFMR OR 12A BUS TROUBLE, lit, or b.
Annunciator L-28, 12B XFMR OR 12B BUS TROUBLE, lit.
0 C
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 3 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
IF AT ANY TIME DURING THIS PROCEDURE A REACTOR TRIP OR SI IS REQUIRED, E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
o IF A TURBINE RUNBACK HAS OCCURRED, THEN AP-TURB.2, AUTOMATIC TURBINE RUNBACK, SHOULD BE PERFORMED.
1 Verify Emergency D/G Associated With Dead Bus-RUNNING o
Bus 12A - D/G A o
Bus 12B - D/G B IF appropriate emergency D/G(s)
NOT
- running, THEN attempt to start manually.
(Refer to ER-D/G.l, RESTORATION OF A FAILED D/G.)
2 Verify Both Trains Of AC Emergency Busses Energized To At Least 420 VOLTS:
o Bus 14 and bus 18 o
Bus 16 and bus 17 Try to restore power to all AC emergency busses.
IR power can NOT
'e restored to at least one train, THEN go to ECA-O.O, LOSS OR. ALL AC
- POVER, Step l.
3 Verify Service Water System Operation:
a.
SV pumps - AT LEAST ONE RUNNING IN EACH LOOP b.
- GREATER THAN 40 PSIG IN EACH LOOP
- a. Manually start pumps as necessary.
(258 kw each)
- b. Manually align valves as necessary.
h
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 4 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 5 Verify Bus 11A And 11B Normal Feed Breakers CLOSED IP turbine trip has occurred from power less than 50X, THEN go to AP-TURB.l, TURBINE TRIP WITHOUT RX TRIP REQUIRED, Step l.
IP turbine stop valves
- open, THEN trip turbine and go'o AP-TURB.1,
. TURBINE TRIP WITHOUT RX TRIP REQUIRED, Step l.
IP turbine NOT previously latched, THEN perform the following:
a.
Ensure reactor power less than SX.
b.
Go to Step 16.
6 Check S/G Level Control o
S/G level - TRENDING TO PROGRAM o
MPW regulating valves-CONTROLLING IN AUTO Place MPW regulating valves in MANUAL and control feed flow as required.
NOTE:
When restarting equipment for recovery, it is preferable to start equipment on busses being supplied from offsite power, if possible.
7 Establish Normal Charging Flow:
- a. Verify 2 charging pumps - RUNNING
- b. Ad)ust charging pump speed and HCV-142 as necessary to restore PRZR level and labyrinth seal D/P
- a. Start charging pumps as necessary (75 kw each).
I 0
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AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 5 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 8
Check CVCS Letdown:
- a. Normal letdown in service:
o Letdovn flov - APPROXIMATELY 40 GPM o
Letdown flow - STABLE o
Letdovn pressure-APPROXIMATELY 250 PSIG b.
Go to Step ll
- a. Perform the folloving:
- 1) Place AOV-427 switch to CLOSE
- 2) Place letdown orifice isolation valves to CLOSE.
3)
Go to Step 9.
9 Check PRZR Level GREATER THAN 13%
Continue with Step 12.
VHEN PRZR level greater than
- 13K, THEN do Steps 10 and 11.
4 0
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AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 6 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 10 Establish Normal Letdown:
- a. Establish charging line flow to REGEN Hx - GREATER THAN 20 GPM.
- b. Verify the following switches in CLOSE:
~ Letdown orifice valve (AOV-'200A, AOV-200B, and AOV-202)
~.Loop B cold leg to REGEN Hx AOV-427
- c. Place letdown controllers in MANUAL at 25X open.
~ TCV-130
~ PCV-135 Establish Excess Letdown:
a.
Place excess letdown divert
- valve, AOV-312, to NORMAL
- b. Ensure CCW from excess letdown
- open, AOV-745
- c. Ensure RCP seal return isolation valve open, MOV-313 d.
Open excess letdown isolation
- valve, AOV-310
- e. Slowly open HCV-123 to maintain excess letdown temperature less than 195'F and pressure less than 100 psig d.
Open AOV-427.
e.
Open letdown orifice valves as necessary.
- f. Place TCV-130 in AUTO at 105'F.
- g. Place PCV-135 in AUTO at 250 psig.
- h. Adjust charging pump speed and HCV-142 as necessary.
C L
- lpl,
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AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 7 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
- CAUTION, o
OBSERVE D/G LOADING LIMITS OF 2300 KW FOR 1/2 HOUR, 2250 KW FOR 2 HOURS, AND 1950 KW FOR CONTINUOUS SERVICE.
o ANYTIME EMERGENCY D/GS ARE THE ONLY SOURCE OF AC POWER TO THE PLANT, PERSONNEL SHOULD BE ASSIGNED TO MAINTAIN SURVEILLANCE OF THE D/GS.'1 Verify PRZR Heaters Restored:
o PRZR proportional heater breaker CLOSED o
PRZR backup heater breaker-RESET/IN AUTO Perform the following:
- a. Verify adequate D/G capacity available for PRZR heaters (400 kw each bank).
- b. Reset and close PRZR proportional heater breaker if necessary.
- c. Reset PRZR backup heater breaker and return to AUTO if necessary.
IF on natural circulation and at least 100 kw of PRZR heaters can NOT be restored within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, THEN be on RHR within an additional 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
(Refer to Technical Specification 3.1.1.5)
'a '!
4'
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AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 8 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 12 Establish Stable Plant Conditions:
- a. Reset NIS rod drop rod stop signals (at NIS racks)
- b. Tavg - TRENDING TO TREF c.
PRZR pressure
- TRENDING TO 2235 PSIG
- b. Insert control rods or, if necessary, decrease turbine load to match Tavg to Tref.
- c. Verify proper operation of PRZR heat'ers and spray or take manual control of PC-431K.
d.
PRZR level - TRENDING TO PROGRAM
- d. Verify proper operation of charging pump speed controllers or take manual control of speed controllers to control PRZR level.
13 Restore Normal Alignment,:
- a. Verify at least 2
CNMT recirc fans
- RUNNING
- b. Verify IA available:
o Annunciator H-8, INSTRUMENT AIR LO PRESS
- EXTINGUISHED o
Annunciator H-16, INSTRUMENT AIR COMPRESSOR
- EXTINGUISHED
- a. Start CNMT recirc fans as necessary (240 kw each).
EOP:
AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 9 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Power operation may continue if conditions required by Tech Spec section 3.7 are met.
14 Establish Normal Operation:
- a. Verify circuit 76702 or 75112-AVAILABLE
- b. Restore power to 12A and/or 12B bus (refer to ER-ELEC.1, RESTORATION OF OFFSITE POVER)
- a. Continue to monitor plant conditions and go to Step 15.
15 Establish Normal Plant Conditions:
- a. Verify EH control in OPER PAN and IMP IN
- b. Verify steam dump controller, HC-484, in AUTO at 1005 psig
- c. Verify annunciator G-15, STEAM DUMP ARMED - EXTINGUISHED i
- a. IF conditions requiring runback have cleared, THEN place EH in OPER PAN and IMP IN.
- c. IF Tavg within 6'F of Tref, THEN perform the following:
- 1) Ensure steam dump valves closed.
- d. Verify charging. pump speed control in AUTO
- e. Verify Rod Control Selector Switch in AUTO
- f. Go to Step 30
- 2) Reset steam dump.
- d. Place charging pump speed control in AUTO if desired.
- e. Place Rod Control Selector Switch in AUTO if desired.
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AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 10 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
o Following RCP trip, a decrease in idle S/G level may occur.
- Also, swell may be anticipated in the operating S/G due to load pickup from the idle loop.
o Temperatures in the loop with the stopped RCP will not be indicative of true Tavg and bT values.
o Attempts to restore offsite power should continue.
(Refer to ER-ELEC.l, RESTORATION OF OFFSITE POWER.)
16 Check S/G Feed Status:
a.
Any main feed pump - RUNNING
- b. Verify S/G levels - TRENDING TO 39%
a.
Perform the following:
- 1) Verify MDAFW pumps running as necessary.
- 2) Verify TDAFW pump running if necessary.
- 3) Ensure Rx power less than 2%.
'. Control feed flow as necessary to restore S/G level.
17 Check TDAFW Pump Status:
a.
TDAFW pump - RUNNING b.
Check S/G status o
At least one S/G level-GREATER THAN 17%
a.
Go to Step 18.
b.
Go to Step 18.
-OR-o Both MDAFW pumps - OPERABLE
- c. Pull stop TDAFW pump'steam supply valves
~ MOV-3504A
~ MOV-3505A
lo 0
N eahAh
AP-ELEC.1 LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE ll of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 18 Check Any RCP INNING Verify natural circulation.
(Refer to Attachment NC.)
IF natural circulation can NOT be verified, THEN increase dumping steam.
C' V~/
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AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 12 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
OBSERVE D/G LOADING LIMITS OF 2300 KW FOR 1/2
- HOUR, 2250 KW FOR 2 HOURS, AND 1950 KW FOR CONTINUOUS SERVICE.
o ANYTIME EMERGENCY D/GS ARE THE ONLY SOURCE OF AC POWER TO THE PLANT, PERSONNEL SHOULD BE ASSIGNED TO MAINTAIN SURVEILLANCE OF THE D/GS.
19 Restore Non-Safeguards Busses As Follows:
- a. Close non-safeguards bus tie breakers for affected bus(ses):
~ Bus 13 to bus 14 tie
~ Bus 15 to bus 16 tie
- a. IF breaker can NOT be closed, THEN notify electricians.
- b. Before energizing affected MCC(s) place the associated pumps in PULL STOP:
o MCC A
~ EH pump A
~ Turning gear oil pump
~ HP seal oil backup pump o
~ EH pump B
- c. Restore power to.affected MCC(s):
~ A from bus 13
~ B from bus 15
~ E from bus 15
~ F from bus 15
- c. IF any breaker can NOT be
- closed, THEN notify electricians.
d.
WHEN bus 15 restored, THEN reset control room lighting if necessary
+.C i U
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 13 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 20 Establish IA:
r
- a. Verify 2 IA compressors
- RUNNING
- b. Check IA supply o
Pressure
- GREATER THAN 60 PSIG o
Pressure
- STABLE OR INCREASING
21 Verify Instrument Bus 1D-ENERGIZED Energize MCC B.
IR MCC B NOT available, THEN perform the following:
- a. Verify MCC A energized.
= b. Place instrument bus D on maintenance supply.
22 Establish Normal Charging Flow:
- a. Verify 2 charging pumps
- RUNNING
- b. Adjust charging pump speed and HCV-142 as necessary to restore PRZR level=and labyrinth seal D/P
- a. Start charging pumps as necessary (75 kw each).
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AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 14 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 23 Check CVCS Letdown:
- a. Normal letdown in service:
o Letdown flow - APPROXIMATELY 40 GPM o
Letdown flow - STABLE o
Letdown pressure-APPROXIMATELY 250 PSIG a.
Perform the following:
- 1) Place AOV-427 switch to CLOSE
- 2) Place letdown orifice isolation valves to CLOSE.
3)
Go to Step 24.
b.
Go to Step 26 24 Check PRZR Level GREATER THAN13'ontinue with Step 27.
MHEN PRZR level greater than 13%,
THEN do Steps 25 and 26.
$4 I a
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 15 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 25 Establish Normal Letdown:
- a. Establish charging line flow to REGEN Hx - GREATER THAN 20 GPM.
- b. Verify the following switches in CLOSE:
~ Letdown orifice valve (AOV-200A, AOV-200B, and AOV-202)
~.Loop B cold leg to REGEN Hx AOV-427
- c. Place letdown controllers in MANUAL at 25X open.
~ TCV-130
~ PCV-135 Establish Excess Letdown:
a.
Place excess letdown divert
- valve, AOV-312, to NORMAL
- b. Ensure CCV from excess letdown
- open, AOV-745
- c. Ensure RCP seal return isolation valve open, MOV-313 d.
Open excess letdown isolation
- valve, AOV-310
- e. Slowly open HCV-123 to maintain excess letdown temperature less than 195'F and pressure less than 100 psig d.
Open AOV-427.
e.
Open letdown orifice valves as necessary.
- f. Place TCV-130 in AUTO at 105'F.
- g. Place PCV-135 in AUTO at 250 psig.
- h. Adjust charging pump speed and HCV-142 as necessary.
1 I
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AP-ELEC.1 T!TLE:
'OSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 16 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
OBSERVE D/G LOADING LIMITS OF 2300 KW FOR 1/2
- HOUR, 2250 KV FOR 2
- HOURS, AND 1950 KV FOR CONTINUOUS SERVICE.
o ANYTIME EMERGENCY D/GS ARE THE ONLY SOURCE OF AC POWER TO THE PLANT, PERSONNEL SHOULD BE ASSIGNED TO MAINTAIN SURVEILLANCE OF THE D/GS.
26 Verify PRZR Heaters Restored:
o PRZR proportional heater breaker
- CLOSED o
PRZR backup heater breaker-RESET/IN AUTO Perform the following:
- a. Verify adequate D/G capacity available for PRZR heaters (400 kw each bank).
I
- b. Reset and close PRZR proportional heater br'eaker if necessary.
- c. Reset PRZR backup heater breaker and return to AUTO if necessary.
IF on natural, circulation and at least 100 kw of PRZR heaters can NOT be restored within" 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, THEN be on RHR within an additional 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
(Refer to Technical Specification 3.1.1.5)
J
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 17 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 27 Establish Stable Plant Conditions:
a.
Tavg - TRENDING TO TREF b.
PRZR pressure
- TRENDING TO 2235 PSIG c.
PRZR level - TRENDING TO PROGRAM
- a. Insert control rods or, if necessary, decrease turbine load to match Tavg to Tref.
- b. Verify proper operation of PRZR heaters and spray or take manual control of PC-431K.
- c. Verify proper operation of charging pump speed controllers or take manual control of speed controllers to control PRZR level.
28 Verify Both S/G Levels GREATER THAN 25~o Control feed flov as necessary to restore both S/G levels greater than 25%.
'l l
lyF
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AP-ELEC. 1 TlTLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 18 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION OBSERVE D/G LOADING LIMITS OF 2300 KW FOR 1/2 HOUR, 2250 KW FOR 2 HOURS, AND 1950 KW FOR CONTINUOUS SERVICE.
NOTE:
Evaluate conditions to determine if turbine should be placed on turning gear.
29 Establish Normal Shutdown Alignment:
- a. Start turning gear oil pump (42 kw) and verify pump - RUNNING
- b. Stop DC emergency oil pump
- c. Verify adequate Rx head cooling:
- 1) Verify at least one control rod shroud fan - RUNNING
- 2) Verify one Rx compartment cooling fan - RUNNING
- d. Dispatch AO to start waste gas compressor as necessary
- e. Start main transformer cooling fans as necessary
- a. Verify DC emergency oil pump running and break vacuum to accelerate turbine coastdown.
Continue with Step 29c.
WHEN shaft stops, THEN stop DC emergency oil pump.
- 1) Manually start one fan as power supply permits (45 kw).
- 2) Manually start one fan as power supply permits (23 kw).
- f. Start CNMT recirc fans as necessary (240 kw each)
- g. Verify radiation monitoring system operating as required
- g. Reset radiation monitors and restart ventilation systems as necessary.
- h. Verify motor fire pump breaker-CLOSED
- h. Close motor fire pump breaker.
rr P
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AP-ELEC.1 TiTLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV' PAGE 19 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 30 WHEN Conditions Permit:,
THEN Restore Offsite'ower (Refer to ER ELEC ~ 1 I RESTORATION OF OFFSITE POWER) 31 Notify Higher Supervision
/
NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.
32 Return To Procedure Or Guidance In Effect
-END-
t
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AP-ELEC.1 LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 1 of 1,
AP-ELEC.
1 APPENDIX LIST "TITLE PAGES 1)
FIGURE MIN SUBCOOLING 2)
ATTACHMENT NC
W A
. ~
EOP:
AP-ELEC. 1 T!TLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 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)
SUBCOOLED REGION E CNMT ADVERS RCS PRESSURE INCREMENTS 20 PSIG 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)