ML17264A822

Rev 15 to FR-P.1, Response to Imminent Pressurized Thermal Shock Condition.

ML17264A822
Person / Time
Site:	Ginna
Issue date:	02/06/1997
From:	ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17264A821	List: ML17264A820 ML17264A822 ML17311A041
References
FR-P.1, NUDOCS 9702190176
Download: ML17264A822 (36)

Text

%OP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 1 of 21 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER RESPONSI MANAGER EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:

97Oaaeos7e 9roeoi f PDR AOOCK 05005244 F PDR )

e EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P.1 SHOCK CONDITION PAGE 2 of 21 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: T I Tt.E:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 3 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: Adverse CNMT values should be used whenever CNMT ~ressure is greater than 4 psig or CNMT radiation is greater than 10+ R/hr.

1 Check RCS Pressure - GREATER IF RHR flow greater than 475 gpm, THAN 250 PSIG t'465 PSIG THEN return to procedure and step adverse CNMT] in effect.

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV 15 FR-P.1 SHOCK CONDITION PAGE 4.of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: A faulted S/G is any S/G that is depressurizing in an uncontrolled manner or is completely depressurized.

2 Check RCS ColC Leg Try to stop RCS cooldown:

Temperatures - STABLE OR I'.

INCREASING 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. Rotate reheater steam supply controller cam to close reheater steam supply valves.

f. IF S/G pressure less than condensate pressure, THEN stop all condensate pumps.

g. IF RHR system in service, THEN stop any cooldown from RHR system.

h. Control total feed flow to non-faulted S/G(s) greater than 200 gpm until narrow range level greater than 5% [258 adverse CNMT] in at least one non-faulted S/G. WHEN S/G level greater than 5% [25% adverse CNMT] in one non-faulted S/G, THEN limit feed flow to stop RCS cooldown.

This Step continued on the next page.

cOP: T1TLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 5 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED (Step 2 continued from previous page)

i. Minimize cooldown from faulted S/G(s):

1) Close faulted S/G(s) TDAFW pump steam supply valve(s).

~ S/G A, MOV-3505A

~ S/G B, MOV-3504A

2) IF both S/G(s) faulted, THEN control feed flow at 50 gpm to each S/G.

3) IF any S/G NOT faulted, THEN

'isolate all feedwater to faulted S/G unless necessary for RCS temperature .control.

IF a faulted S/G is necessary for RCS temperature control, THEN control feed flow at 50 gpm to that S/G.

3 Check PRZR PORV Block Valves:

a. Power to PORV block valves a. Restore power to block valves AVAILABLE unless block valve was closed to isolate an open PORV:

~ MOV-515, MCC D position 6C

~ MOV-516, MCC C position 6C

b. Block valves '- AT LEAST ONE OPEN b. Open one biock valve unless it was closed to isolate an open PORV.

IF at least one block valve can NOT be opened, THEN dispatch AO to locally check breaker.

~ MOV-515, MCC D position 6C

~ MOV-516, MCC C position 6C

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV 15 FR-P. 1 SHOCK CONDITION PAGE 6 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION IF ANY PRZR PORV OPENS BECAUSE OF HIGH PRZR PRESSURE, THEN STEP 4 SHOULD BE PERFORMED AFTER PRESSURE DECREASES TO LESS THAN THE APPLICABLE PORV SETPOINT.

4 Check PRZR PORV Status:

a. Check Reactor Vessel a. Go to Step 4d.

Overpressure Protection System-IN SERVICE

b. Check RCS pressure - LESS THAN b. Perform the following:

410 PSIG

1) Ensure at least one PRZR PORV open.

2) Continue with Step 5. WHEN pressure less than setpoint, THEN do Step 4e ~

c. Go to Step 4e

d. PRZR pressure - LESS THAN d. Perform the following:

2335 PSIG

1) Ensure at least one PRZR PORV open.

2) Continue with Step 5. WHEN pressure less than setpoint, THEN do Step 4e.

e' Verify PRZR PORVs - CLOSED e. Manually close valve.

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

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 7 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 5 Check SZ Pumps - ANY RUNNING Go to Step 13.

6 Check Zf SZ Can Be Terminated: Do NOT stop SI pumps. Perform the following:

o RCS subcooling based on core exit T/Cs - GREATER THAN 50'F a. IF RCS subcooling based on core USING FIGURE MIN SUBCOOLING exit T/Cs greater than O'F using

'igure MIN SUBCOOLING and no RCP o Check RVLIS indication: running, THEN attempt to start an RCP:

o Level (no RCPs) - GREATER THAN 68% [73% adverse CNMT) 1) Establish conditions for starting an RCP:

-OR-o Bus llA or 11B.energized o Fluid fraction (any RCP running) - GREATER THAN 80% o Refer to Attachment RCP START

2) IF conditions established, THEN start one RCP.

b. Go to Step 26".

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 SZ

TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV 15 FR-P. 1 SHOCK CONDITION PAGE 8 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 8 Stop SI And RHR Pumps And

,Place In AUTO 9 Reset CI:

a. Depress CI reset pushbutton

b. Verify annunciator A-26, CNMT b. Perform the following:

ISOLATION - EXTINGUISHED

1) Reset SI.

h

2) Depress CI reset pushbutton.

10 Verify Adequate SW Flow:

a. Check at least two SW pumps a. Manually start SW- pumps as power RUNNING supply permits (258 kw each).

IF less than two SW pumps running, THEN perform the

, following:

1) Ensure SW isolation.

2) Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1).

3) Go to Step 12. WHEN adequate SW available, THEN do Step 11.

b. Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1)

~e 0

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 9 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 11 Estahli.sh IA to CNMT:

a. Verify non-safeguards busses a. Perform the following:

energized from offsite power

1) Close non-safeguards bus tie o Bus 13 normal feed - CLOSED breakers:

-OR- ~ Bus 13 to Bus 14 tie

~ Bus 15 to Bus 16 tie o Bus 15 normal feed -, CLOSED

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

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

3) WHEN bus 15 restored, THEN reset control room lighting.

b. Verify SW isolation valves to b. Manually align valves.

turbine building - OPEN

~ MOV-4613 and MOV-4670

~ MOV-4614 and MOV-4664

c. Verify at least two air c. Manually start air compressors compressors - RUNNING as power supply permits (75 kw each). IF air compressors can NOT be started, THEN dispatch AO to locally reset compressors as necessary.

d. Check IA supply: d. Perform the following:

o Pressure - GREATER THAN 1) Continue attempts to restore 60 PSIG IA (Refer to AP-IA.l, LOSS OF INSTRUMENT AIR).

o Pressure - -STABLE OR INCREASING 2) Continue with Step 12. WHEN IA restored, THEN do Steps lie and f.

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

f. Verify IA to CNMT AOV-5392 - OPEN

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P.1 SHOCK CONDITION PAGE 10 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 12 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 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 Oa.

b. Align charging pump suction to b. IF LCV-112B can NOT be opened, RWST: THEN perform the following:

o LCV-112B - OPEN 1) Verify charging pump A NOT running and place in PULL o LCV-112C - CLOSED 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).

c. Start charging pumps as necessary to establish charging line flow to REGEN HX - GREATER THAN 20 GPM

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P.1 SHOCK CONDITION PAGE 11 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• 13 Monitor SI Reinitiation Manually operate SI pumps as Criteria: necessary and perform the following o - RCS exit subcooling based on core T/Cs - GREATER THAN FIGURE

'. IF RCS exit subcooling based on core T/Cs greater than Figure MIN SUBCOOLING MIN SUBCOOLING and no RCP running, THEN attempt to start a o RVLIS indication: RCP:

o Level - GREATER THAN 68% [73% 1) Establish conditions for adverse CNMT] starting an RCP:

-OR- o Bus 11A or 11B energized o Fluid fraction (any RCP o Refer to Attachment RCP running) - GREATER THAN 80% START

2) IF conditions established, THEN start one RCP.

b. Go to Step 26.

14 Check RCS Hot Leg IF increasing, THEN control feed Temperatures - STABLE flow and dump steam to stabilize RCS hot leg temperatures.,

IF decreasing, THEN verify that actions of Step 2 have been performed before continuing with procedure.

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P.1 SHOCK CONDITION PAGE 12 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 15 Check If SI Isolated:

ACCUMs Should Be

a. Check the following: a. Return to Step 13.

o RCS subcooling based on core exit T/Cs - GREATER THAN O' USING FIGURE MIN SUBCOOLING o RVLIS indication:

o Level - GREATER THAN 68%

[73% adverse CNMT]

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

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 ACCUH discharge valves c. Vent any unisolated ACCUMs':

~ MOV-841 1) Open vent valves for

~ MOV-865 unisolated SI ACCUMs.

~ 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.

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

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 13 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION THE RCS SHOULD NOT BE DEPRESSURIZED TO LESS THAN SI ACCUM PRESSURE UNTIL SI ACCUMS ISOLATED.

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 a PRZR PORV select one with an operable block valve.

16 Depressurize RCS To Decrease RCS Subcooling:

a. Depressurize using normal PRZR a. IF normal spray NOT available, spray if available THEN use one PRZR PORV. IF IA NOT available, THEN refer to Attachment N2 PORVS.

IF no PRZR PORV available, THEN use auxiliary spray valve (AOV-296).

b. Depressurize RCS until one of the following conditions satisfied:

o RCS subcooling based on core exit T/Cs - LESS THAN 10'F USING FIGURE MIN SUBCOOLING

-OR-o PRZR level - GREATER THAN 87$

[75% adverse CNMT]

-OR-o RCS pressure - LESS THAN 160 psig [200 psig adverse CNMT]

c. Stop RCS depressurization

tOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 14 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• 17 Monitor RCP Operation:

a. RCPs - ANY RUNNING a. Go to Step 18.

b.. Check the following: b. Stop affected RCP(s).

o RCP ¹1 seal D/P - GREATER THAN 220 PSID o RCP ¹1 seal leakoff - WITHIN THE NORMAL OPERATING RANGE OF FIGURE RCP SEAL LEAKOFF 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.

18 Check PRZR Level - GREATER Try to restore level with charging THAN 134 [404 adverse CNMT] while maintaining stable RCS pressure. IF level can NOT be restored, THEN go to Step 25.

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV'5 FR-P.1 SHOCK CONDITION PAGE 15 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 19 Check Operation If Normal CVCS, Can Be Established

a. Verify IA restored: a. Continue with Step 23. WHEN IA restored, THEN do,Steps 19 o IA to CNMT (AOV-5392) - OPEN through 22.

o IA pressure - GREATER THAN 60 PSIG

b. CCW pumps - ANY RUNNING b. Perform the following:

1) IF any RCP ¹1 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

2) Manually start one CCW pump.

c. Verify instrument bus D- c. Energize MCC B. IF MCC B NOT ENERGIZED available, THEN perform the following:

1) Verify MCC A energized.

2) Place instrument bus D on maintenance supply.

d. Charging pump - ANY RUNNING d. Continue with Step 24. WHEN any charging pump running, THEN do Steps 20 through 24.

I l TITLE:

RESPONSE TO ZMMZNENT PRESSURZZED THERMAL REV: 15 FR-P.1 SHOCK CONDZTZON PAGE 16 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION IF RCS PRESSURE LESS THAN 250 PSIG, THEN PCV-135 SHOULD BE ADJUSTED TO ESTABLISH DESIRED LETDOWN FLOW, NOT TO INCREASE PRESSURE.

20 Establish Normal Letdown: ~ IF RCP seal return has been established, THEN establish excess

a. Establish charging line flow to letdown as follows:

REGEN Hx - GREATER THAN 20 GPM o Place excess letdown divert

b. Place the following switches to valve, AOV-312, to NORMAL.

CLOSE:

o Ensure CCW from excess letdown

~ Letdown orifice valves open, (AOV-745).

(AOV-200A, AOV-200B, and AOV-202) o Open excess letdown isolation

~ AOV-371, letdown isolation valve AOV'-310.

valve AOV-427-, loop B cold leg to o Slowly open HCV-123 to maintain REGEN Hx excess letdown temperature less than 195'F and pressure less

c. Place letdown controllers in than 100 psig.

MANUAL at 40% open o Adjust charging pump speed as

~ TCV-130 necessary.

~ PCV-135 IF RCP seal return NOT established,

d. Reset both for trains of XY relays THEN consult TSC to determine if AOV-371 and AOV-427 excess letdown should be placed in service.

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

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 17 of 21 .

STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 21 Check VCT Makeup System:

a. Adjust boric acid flow control valve in AUTO to 9.5 gpm

b. Adjust"RMW flow control valve in AUTO to 40 gpm

c. Verify the following: c.'djust controls as necessary.-

1) RMW mode selector switch in AUTO

2) RMW control armed - RED LIGHT LIT

d. Check VCT level: d. Manually increase VCT makeup flow as follows:

o Level - GREATER THAN 20%

1) Ensure BA transfer pumps and

-OR- RMW pumps running. IF NOT, THEN reset MCC C and MCC D UV o Level - STABLE OR INCREASING lockouts as necessary.

2) Place RMW flow control valve HCV-ill in MANUAL and increase RMW flow.

~

3) Increase boric acid flow as necessary.

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P.1 SHOCK CONDITION PAGE 18 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 22 Check Charging Pump Suction Aligned To VCT:

a. VCT level - GREATER THAN 20% a. IF VCT level can NOT be maintained greater than 5%, THEN perform the following:

1) Ensure charging pump suction aligned to RWST o LCV-112B open o LCV-112C closed

2) Continue with Step 23. WHEN VCT level greater than 40%,

THEN do Step 22b.

b. Verify charging pumps aligned to b. Manually align valves as VCT necessary.

o LCV-112C - OPEN o LCV-112B - CLOSED 23 Check PRZR Level - LESS THAN Control charging and letdown as 87% [754 adverse CNMT] necessary to reduce PRZR level to less than 87$ [75% adverse CNMT].

If necessary establish excess letdown.

IF no letdown available AND CCW to RCPs established, THEN cycle charging pumps as necessary to control PRZR level.

EOP: jITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 19 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: For optimum long term pressure control, saturated conditions should be restored in the PRZR.

24 Verify PRZR Liquid IF PRZR liquid temperature low, Temperature (TZ-424) - AT THEN energize PRZR heaters as SATURATION FOR DESIRED necessary to establish desired PRESSURE temperature.

25 Check RCS Subcooling Based On IF RCS pressure less than 160 psig Core Exit T/Cs - LESS THAN [200 psig adverse CNMT], THEN go to 10'F USING FIGURE MZN Step 26. IF NOT, THEN depressurize SUBCOOLING using normal spray. Return to

'step 16b.

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.

26 Check Cool Down Rate In RCS Return to procedure and step in Cold Legs - GREATER THAN effect.

100'F IN ANY 60 MINUTES PERIOD 27 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

1

~

4

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV 15 FR-P.1 SHOCK CONDITION PAGE 20 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: The following pressure, temperature and cooldown rate limits remain applicable in subsequent procedures.

28 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. Establish and maintain cooldown rate in RCS cold legs - LESS THAN 50'F IN ANY 60 MINUTES PERIOD 29 Verify SZ Floe Not Required: Manually operate SI pumps as necessary.

o RCS subcooling based on core exit T/Cs - GREATER THAN FIGURE IF RCS subcooling based on core MIN SUBCOOLING exit T/Cs greater than Figure MIN SUBCOOLING and no RCP running, THEN o RVLIS indication: perform the following:

o Level - GREATER THAN 68% [73% a. Establish conditions for adverse CNMT] starting an RCP:

-OR- o Bus 11A or 11B energized o Fluid fraction (any RCP o Refer to Attachment RCP START running) - GREATER THAN 80%

b. IF conditions established, THEN start one RCP.

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 21 of 21 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 30 Return To Procedure And Step In Effect

-END-

4 0

~ g

~ I ~

EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P.1 SHOCK CONDITION PAGE 1 of 1 FR-P.1 APPENDIX LIST TITLE PAGES

1) FIGURE MIN SUBCOOLING

2) FIGURE SOAK LIMITS

3) FIGURE RCP SEAL LEAKOFF

4) ATTACHMENT RCP START

5) ATTACHMENT SD-1

6) ATTACHMENT CNMT RECIRC FANS

7) ATTACHMENT N2 PORVS

~ ~

4

~ ~

EOP: T1TLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 15 FR-P. 1 SHOCK CONDITION PAGE 1 of 1 FIGURE MIN SUBCOOLING

.NOTE: Subcooling Margin = Saturation Temperature From Figure Below I-] Core Exit T/C Indication RC S PRESSURE (PSIG) 2500 2400 RCS PRESSURE 2300 INCREMENTS 20 PSIG 2200 2100 2000 1900 1800 1700 1600 1500 1400 SUBCOOLED 1300 REGION 1200 1100 1000 900 800 700 INADEQUATE'U BCOOL ING 600 REGION ADVERS NHT 500 400 300 200 NORMAL CNHT TEMPERATURE 100 INCREMENTS 10'F 0

200 250 300 350 CORE 400 450 500 550 EXIT SATURATION TEMPERATURE ( ') 600 650 700

<o TlTLE: 'I RESPONSE TO IMMINENT PRESSURIZED THERMAL REV'5 FR-P. 1 SHOCK CONDITION

-PAGE 1 of 1 FIGURE SOAK LIMITS RCS PRESSURE (PSIG) 2500 2400 RCS PRESSURE 2300 INCREHENTS 20 PSIG 2200 2100 2000 1900 1800 1700 1600 1500 1400 REHAIN 1300 BELOW 1200 CURVE 1100 1000 900 800 700 600 500 400 300 200 TEHPERATURE INCREHENTS 10'F 100 0

200 250 300 350 400 450 500 550 600 650 700 RCS COLO LEG TEMPERATURE ('F)

EOP: T!TLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV 15 FR-P. 1 SHOCK CONDITION PAGE 1 of 1 FIGURE RCP SEAL LEAKOFF

¹1 SEAL LEAK RATE (GPM) 6 LEAK RATE INCREMENTS 0.2 GPM NORMAL OPERATING RANGE DP INCREMENTS 50 PSI 250 500 750 1000 1250 1500 1750 2000 2250 2500

¹1 SEAL DP (RCS PRESS - VCT PRESS) PSI

lt '4;a ~c

~ r

. P C

E Il