ML17250B135
| ML17250B135 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 04/09/1990 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17250B096 | List:
|
| References | |
| FR-P.1, NUDOCS 9004200759 | |
| Download: ML17250B135 (46) | |
Text
EOP:
FR-P.1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 1 of 20 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER 3 ~
TECHNICAL REVIEW PORC REVIEW DATE T SUPERIN EN ENT EFFECTI E DATE QA X NON-QA CATEGORY 1-0 6INNASTATION START; DATE REVIEWED BY:
900420075%
900410 PDR ADOCK 05000244, P
PNU COi~stPL -') Eg.
DATE TIME:
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV' PAGE 2 of 20 A.
PURPOSE - This procedure provides actions to avoid, or limit, thermal shock or pressurized thermal shock to the reactor pressure
- vessel, or overpressure conditions at low temperature.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from:
a.
F-0.4, INTEGRITY Critical Safety Function Status
- Tree, on either a
RED or ORANGE condition.
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 3 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
o A faulted S/G is any S/G that is depressurizing in an uncontrolled manner or is completely depressurized.
o Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNMT radiation is greater than '10
~ R/hr.
1 Check RCS Cold Leg Temperatures STABLE OR INCREASING Try to stop RCS cooldown:
a.
Ensure S/G ARVs closed.
- b. Close both S/G MSIVs.
- c. Ensure MFW flow control valves closed.
~
MFW regulating valves
~
MFW bypass valves
- d. Ensure MFW pumps tripped.
- e. IF S/G pressure less than condensate
- pressure, THEN stop all condensate pumps.
- g. Control total feed flow to non-faulted S/G(s) greater than 200 gpm until narrow range level greater than 5X [25X adverse CNMT] in at least one non-faulted S/G.
WHEN S/G level greater than 5X [25X adverse CNMT] in one non-faulted S/G, THEN limit feed flow to stop RCS cooldown.
This Step continued on the next page.
EOP:
FR-P. 1
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV 5
PAGE 4 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED (Step 1 continued from previous page)
- h. Minimize cooldown from faulted S/G(s):
- 1) Close faulted S/G(s)
TDAPW pump steam supply valve(s).
~ S/G A) MOV-3505A
~ S/G B, MOV-3504A
- 2) Ip both S/G(s) faulted, THEN control feed flow at 50 gpm to each S/G.
- 3) IP any S/G NOT faulted, THEN isolate all feedwater to faulted S/G unless necessary for RCS temperature control.
IP a faulted S/G is necessary for RCS temperature
- control, THEN control feed flow at 50 gpm to that S/G.
2 Check PRZR PORV Block Valves:
a.
Power to PORV block valves-AVAILABLE
- b. Block valves - AT LEAST ONE OPEN
- a. Restore power to block valves unless block valve was closed to isolate an open PORV:
~ MOV-515, MCC C position 6C
~ MOV-516, MCC D position 6C b.
Open one block valve unless it was closed to isolate an open PORV.
IP at least one 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
EOP:
FR-P.1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 5 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 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 3b).
3 Check If PRZR PORVs Should Be Closed:
a.
Check the following:
o PRZR pressure
- LESS THAN 2335 PSIG IF RCS OVERPRESSURE PROTECTION SYSTEM NOT IN SERVICE
-OR-o RCS pressure
- LESS THAN 410 PSIG IF RCS OVERPRESSURE PROTECTION SYSTEM IN SERVICE
- b. Verify PRZR PORVs - CLOSED a.
Perform the following:
- 1) Ensure at least one PRZR PORV open.
- 2) Continue with Step 4.
VHEN-pressure less than setpoint, THEN do Step 3b.
- b. Manually close valve.
IF any valve can NOT be closed, THEN manually close its block valve.
4 Check SI Pumps ANY RUNNING Go to Step 13.
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV 5
PAGE 6 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 5
Check If SI Can Be Terminated:
o RCS subcooling based on core exit T/Cs - GREATER THAN 50'F USING FIGURE MIN SUBCOOLING o
Check RVLIS indication:
Do NOT stop SI pumps.
Perform the folloving:
- a. IF RCS subcooling based on core exit T/Cs greater than O'F using Figure MIN SUBCOOLING and no RCP
- running, THEN attempt to start an RCP:
o Level (no RCPs)
- GREATER THAN 68X [73X adverse CNMT]
-OR-o Fluid fraction (any RCP running) - GREATER THAN 80X
- 1) Establish conditions for starting an RCP:
o Bus 11A or llB energized o
Refer to Attachment RCP START
- 2) IF conditions established, THEN start one RCP.
If b.
Go to Step 25.
CAUTION IF OFFSITE 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 SAFEGUARDS EQUIPMENT.
6 Reset SI 7
Stop SI And RHR Pumps And Place In AUTO
EOP:
FR-P. 1
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV 5
PAGE 7 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 8
Reset CI:
- a. Operate CI reset key switch
- b. Verify annunciator A-26, CNMT ISOLATION - EXTINGUISHED
- b. Perform the following:
- 1) Reset SI.
- 2) Operate CI reset key switch.
9 Verify Adequate SN Flow:
a.
Check at least two SW pumps RUNNING
- b. Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1)
- a. Manually start SV pumps as power supply permits (258 kw each).
IF less than two SV pumps
- running, THEN perform the following:
- 1) Ensure SV isolation.
- 2) Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1).
3)
Go to Step 11.
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 8 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 10 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
- 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 PANS).
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.1, LOSS OF INSTRUMENT AIR).
- 2) Continue with Step ll.
WHEN IA restored, THEN do Steps 10e and f.
EOP:
FR-P. 1 TiTLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 9 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION ALIGNING SI PUMP SUCTION TO RWST BEFORE ISOLATING BAST MAY RESULT IN BACKFLOW FROM RWST TO BASTS.
ll Verify SI Pump Suction Aligned To RWST:
a.
SI pump suction valves from BASTs -
CLOSED
~ MOV-826A
~ MOV-826B
~ MOV-826C
~ MOV-826D a.
Ensure at. least one valve in each flow path closed.
~ MOV-826A or MOV-826B
~ MOV-826C or MOV-826D
~ MOV-825A
~ MOV-825B
- b. Ensure at least one valve is open.
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 10 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 12 Check If Charging Flow Has Been Established:
- a. Charging pumps - ANY RUNNING
- b. Align charging pump suction to RWST:
o LCV-112B -
OPEN o
LCV-112C - CLOSED
- c. Start charging pumps as necessary and adjust charging flow to restore PRZR level
- a. Perform the following:
- 1) IF CCW flow is lost to any RCP thermal barrier OR any RCP fl seal outlet temperature offscale high, THEN dispatch AO with key to RWST gate to locally close seal in)ection needle valve(s) to affected RCP:
~ RCP A, V-300A
~ RCP B, V-300B
- 2) Ensure HCV-142 open, demand at OX.
- b. IF LCV-112B can NOT be opened, THEN perform the following:
- 1) Verify charging pump A NOT running and place in PULL STOP.
- 2) Dispatch AO to locally open manual charging pump suction from RWST (V-358 located in charging pump room).
3)
WHEN V-358 open, THEN direct AO to close V-268 to isolate charging pumps B and C from VCT (V-268 located in charging pump room).
I V
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 11 of 20 STEP ACTION/EXPECTED RESPONSE,
RESPONSE
NOT OBTAINED 13 Verify SI Flow Not Required:
o RCS subcooling based on core exit T/Cs - GREATER THAN O' USING FIGURE MIN SUBCOOLING o
RVLIS indication:
o Level - GREATER THAN 68X [73%
adverse CNMTJ
-OR-o Fluid fraction (any RCP running) - GREATER THAN 80%
Manually operate SI pumps as necessary and perform the following:
- a. IF RCS subcooling based on core
. exit T/Cs greater than O' Figure MIN SUBCOOLING and no RCP
- running, THEN attempt to start an RCP:
- 1) Establish conditions for starting an RCP:
o Bus 11A or llB energized o
Refer to Attachment RCP START
- 2) IF conditions established, THEN start one RCP.
b.
Go to Step 25.
14 Check RCS Hot Leg Temperatures STABLE IF increasing, THEN control feed flow and dump steam to stabilize RCS hot leg temperatures.
IF decreasing, THEN verify that actions of Step 1 have been performed before continuing with procedure.
I v
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 12 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 15 Check If SI ACCUMs Should Be Isolated:
a.
Check the following:
o RCS subcooling based on core exit T/Cs - GREATER THAN O' USING FIGURE MIN SUBCOOLING
- a. Return to Step 13.
o RVLIS indication:
o Level - GREATER THAN 68X
[73X adverse CNMT]
-OR-o Fluid fraction (any RCP running) - GREATER THAN 80X
~ 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.
- 3) Continue with Step 16.
Do NOT decrease RCS pressure to less than unisolated ACCUM pressure.
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 13 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION THE RCS SHOULD NOT BE DEPRESSURIZED TO LESS THAN SI ACCUM PRESSURE UNTIL SI ACCUMS ISOLATED.
16 Depressurize RCS To Decrease RCS Subcooling:
- a. Depressurize using normal PRZR spray if available
- a. IF normal spray NOT available, THEN use one PRZR PORV.
IF IA NOT available, THEN refer to Attachment N2 PORVS.
- b. Depressurize RCS until either of the following conditions satisfied:
IF no PRZR PORV available, THEN use auxiliary spray valve (AOV-296).
o RCS subcooling based on core exit T/Cs - LESS THAN 10'F USING FIGURE MIN SUBCOOLING
-OR-o PRZR level - GREATER THAN 871
[75% adverse CNMT]
- c. Stop RCS depressurization
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV
'5 PAGE 14 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED r
CAUTION AN INCREASE IN RCS PRESSURE MAY RESULT IN EXCESSIVE REACTOR VESSEL STRESS.
RCS PRESSURE AND TEMPERATURE SHOULD BE MAINTAINED STABLE WHILE PERFORMING SUBSEQUENT STEPS IN THIS PROCEDURE.
17 Check PRZR Level GREATER THAN 13> [404 adverse CNMT]
Try to restore level with charging while maintaining stable RCS pressure.
IF level can NOT be restored,-
THEN go to Step 24.
EOP:
FR-P.1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV 5
PAGE 15 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 18 Check If Normal CVCS Operation Can Be Established
- a. Verify IA restored:
OPEN o
IA pressure
- GREATER THAN 60 PSIG
- a. Continue with Step 22.
WHEN IA
- restored, THEN do Steps 18 through 21.
b.
CCW pumps
- ANY RUNNING
- b. Perform the following:
- 1) IF any RCP gl seal outlet temperature offscale high, THEN isolated CCW to thermal barrier of affected RCP(s).
~ RCP A, MOV-749A and MOV-759A
~ RCP B, MOV-749B and MOV-759B
- c. Verify instrument bus D-ENERGIZED
- d. Charging pump - ANY RUNNING
- 2) Manually start one CCW pump.
- c. 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.
- d. Continue with Step 23.
WHEN any charging pump running, THEN do Steps 19 through 23.
EOP:
FR-P.1 TlTLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV 5
PAGE 16 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 19'stablish Normal Letdown:
- a. Establish charging line flow to REGEN Hx - GREATER THAN 20 GPM
- b. Place the following switches to CLOSE:
~ Letdown orifice valves (AOV-200A, AOV-200B, and AOV-202)
~ AOV-371, letdown isolation valve
~ AOV-427, loop B cold leg to REGEN Hx
- c. Place letdown controllers TCV-130 and PCV-135 in MANUAL at 25X open
- d. Reset both trains of XY relays for AOV-371 and AOV-427 e.
Open AOV-371 and AOV-427
- f. Open letdown orifice valves as necessary
- g. Place TCV-130 in AUTO at 105 F
- h. Place PCV-135 in AUTO at 250 psig
- i. 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:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV 5
PAGE 17 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 20 Check VCT Makeup System:
a.
BAST levels - ANY GREATER THAN 5X
- b. Check Annunicator B-23, BORIC ACID TANK LO LO LEVEL EXTINGUISHED a.
Go to Step 21.
- b. Perform the following:
- 1) Adjust boric acid flow control valve to required flow from table.
BAST LEVEL
<10X 10-15X 15-20X
>20X BORIC ACID FLOW (GPM) 4.5 6.7 8.9 10.0
- c. Adjust boric acid flow control valve in AUTO to 4.5 gpm
- d. Verify the following:
1)
RMW mode selector switch in AUTO 2)
RMW control armed -.RED LIGHT LIT 2)
Go to Step 20d.
- d. Adjust controls as necessary.
e.
Check VCT level:
o Level - GREATER THAN 20X
-OR-o Level -
STABLE OR INCREASING
- e. Manually increase VCT makeup flow as follows:
- 1) Ensure BA transfer pumps and RMW pumps running.
IF NOT, THEN reset MCC C and MCC D UV lockouts as necessary.
- 2) Place RMW flow control valve HCV-ill in MANUAL and
'ncrease RMW flow.
- 3) Increase boric acid flow as necessary.
i I
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV 5
PAGE 18 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 21 Check Charging Pump Suction Aligned To VCT:
a.
VCT level - GREATER THAN 20X
- a. IP VCT level can NOT be maintained greater than 5X, 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 22.
WHEN VCT level greater than 40X, THEN do Step 21b.
- b. Manually align valves as necessary.
22 Check PRZR Level LESS THAN 874 r'754 adverse CNMT]
Control charging and letdown as necessary to reduce PRZR level to less than 87X [75X adverse CNMT].
If necessary establish excess letdown.
IP no letdown available AND CCW to RCPs established, THEN cycle charging pumps as necessary to control PRZR level.
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 19 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 23 Energize PRZR Heaters And Operate Normal PRZR Spray As Necessary To Maintain Pressure Stable IF normal spray NOT available and letdown is in service, THEN use auxiliary spray valve (AOV-296).
IF auxiliary spray NOT available, THEN use one PRZR PORV.
24 Check RCS Subcooling Based On Core Exit T/Cs BETWEEN 10'F AND 20'F USING FIGURE MIN SUBCOOLING IF normal spray NOT available and letdown is in service, THEN use auxiliary spray for any further depressurization.
Return to Step 16b.
IF auxiliary spray NOT available, THEN return to Step 16a.
25 Check Cool Down Rate In RCS Cold Legs GREATER THAN 100'F IN ANY 60 MINUTES PERIOD Return to procedure and step in effect.
26 Maintain RCS Pressure And Temperature Stable For At Least 1 Hour
- a. Control steam dump and feed flow as necessary
- b. Perform actions of other procedures in effect which do not cool down the RCS or increase RCS pressure until the RCS temperature soak has been completed
Q ~
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV 5
PAGE 20 of 20 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 27 WHEN 1 HOUR Soak Is
- Complete, THEN Continue RCS Cooldown And Depressurization As Necessary
- a. Maintain RCS pressure and cold leg temperature within the limits of Figure SOAK LIMITS
- b. Maintain cooldown rate in RCS cold legs LESS THAN 50'F IN ANY 60 MINUTES PERIOD 28 Return To Procedure And Step In Effect
-END-
EOP:
FR-P.1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV 5
PAGE 1 of 1 FR-P.1 APPENDIX LIST TITLE 1)
FIGURE MIN SUBCOOLING 2)
FIGURE SOAK LIMITS 3)
ATTACHMENT RCP START 4)
ATTACHMENT SD-1 5)
ATTACHMENT CNMT RECXRC FANS 6)
ATTACHMENT N2 PORVS 7)
ATTACHMENT SX FLUSH PAGES
EOP:
FR-P. 1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV:
5 PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE:
Subcooling Margin = Saturation Temperature From Figure Below t-] Core Exit T/C Indication S
PRESSURE (PSIG)
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
20 RCS PRESSURE INCREMENTS 20 PSIG SUBCOOLED REGION INADEQUATE SUBCOOLING REGION ADVERSE TEMPERATURE INCREMENTS 10'F NORMAL CNMT 0
250 300 350 400 450 500 550
- 600 650 700 CORE EXIT SATURATION TEMPERATURE ('R)
)
EOP:
FR-P.1 TITLE:
RESPONSE
TO IMMINENT PRESSURIZED THERMAL SHOCK CONDITION REV 5
PAGE 1 of 1 RCS 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
PRESSURE (PSIG)
~ -.
~ ~
RCS PRESSURE INCREMENTS 20 PSIG FIGURE SOAK LIMITS ACCEPTABLE REGION ROR COOLDOWN
~
TEMPERATURE INCREMENTS 10'R 200 250 300 350 400 450 500 550 600 650 700 RCS COLD LEG TEMPERATURE ('R)
J