ML17264A977

Rev 11 to AP-RCP.1, RCP Seal Malfunction.

ML17264A977
Person / Time
Site:	Ginna
Issue date:	08/05/1997
From:	ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17264A976	List: ML17264A975 ML17264A977 ML17264A978 ML17264A979 ML17311A050
References
AP-RCP.1, NUDOCS 9708130125
Download: ML17264A977 (32)

Text

EOP: TITLE:

REV 11 AP-RCP.1 RCP SEAL MALFUNCTION PAGE 1 of 10 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER RESPONSIBLE AGER EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:

9708i30125 970805 PDR ADOCK 05000244 PDR

EOP:

REV 11 AP-RCP.1 RCP SEAL MALFUNCTION PAGE 2 of 10 A. PURPOSE This procedure provides the instructions necessary to diagnose and to respond to a reactor coolant pump seal malfunction.

B. ENTRY CONDITIONS/SYMPTOMS

1. ENTRY CONDITIONS This procedure is entered from:

a. E-3, STEAM GENERATOR TUBE RUPTURE, or

b. ES-l.l, SI TERMINATION, or

c. ES-1.2, POST LOCA COOLDOWN AND DEPRESSURIZATION, or

d. ECA-0.1, LOSS OF ALL AC POWER RECOVERY WITHOUT SI REQUIRED, or

e. ECA-2.1, UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS, or

f. ECA-3.1, SGTR WITH LOSS OF REACTOR COOLANT-SUBCOOLED RECOVERY DESIRED, or

g. ECA-3.2, SGTR WITH LOSS OF REACTOR COOLANT-SATURATED RECOVERY DESIRED, .or

h. ECA-3.3, SGTR WITHOUT PRESSURIZER PRESSURE CONTROL, or

i. FR-I.1, RESPONSE TO HIGH PRESSURIZER LEVEL, when RCP seal malfunction is indicated.

2. SYMPTOMS - The symptoms of RCP SEAL MALFUNCTION are;

a. Annunciator B-17(18), RCP A(B) No.1 SEAL HI-LO FLOW 5.0 GPM 1.0 , lit, or

b. Annunciator B-9(10), RCP A(B) LABYR SEAL LO DIFF PRESS 15" H20, lit, or

c. Annunciator B-3(4), RCP A(B) STAND PIPE HI LEVEL + 1 FT, lit, or Continued on next page

REV: 11 AP-RCP. 1 RCP SEAL MALFUNCTION PAGE 3 of 10

2. SYMPTOMS (cont)

d. Annunciator B-ll(12), RCP A(B) STAND PIPE LO LEVEL -4 FT, lit, or

e. Annunciator B-25(26), RCP A(B) No. 1 SEAL LO DIFF PRESS 220 PSID, lit, or

f. Annunciator B-l(2), RCP A(B) No. 1 SEAL OUT HI TEMP 200'F, lit, or,

g. Annunciator A-7(15), RCP A(B) CCW RETURN HIGH TEMP OR FLOW, lit.

LOW

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REV 11 AP-RCP. 1 RCP SEAL MALFUNCTION PAGE 4 of 10 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION o IF, AT ANY TIME DURING THIS PROCEDURE, A'EACTOR TRIP OR SI OCCURS, E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.

o IF ANY RCP IS TRIPPED, THEN SHUTDOWN MARGIN REQUIREMENTS SHOULD BE VERIFIED (REFER TO 0-3.1, BORON CONCENTRATION FOR XENON FREE ALL RODS IN MOST REACTIVE ROD STUCK OUT SHUTDOWN MARGIN).

o IF A RCP IS SECURED BECAUSE OF A SEAL MALFUNCTION, IT SHOULD NOT BE RESTARTED UNTIL THE CAUSE OF THE MALFUNCTION HAS BEEN DETERMINED AND CORRECTED.

NOTE; o If a Reactor trip is iTIitiated while performing Step 1, transition to E-0 should occur while completing subsequent actions of the step.

o Total ¹1 Seal Flow is defined as the sum of indicated ¹1 Seal Leakoff Flow and RCDT leak rate (PPCS Point ID L1003, 3.2 gal/8 in the normal operating range).

1 Check Total $ 1 Seal Leakaff IF a ¹1 Seal Failure is verified by Flows LESS THAN 8.0 GPM a decrease in Labyr Seal Diff Pressure OR increasing Seal Inlet/Outlet temps, THEN perform the following:

a. IF reactor trip breakers closed, THEN trip the reactor.

b. Trip the affected RCP(s).

c. Allow 4 minutes for pump coast down, THEN close affected RCP(s) seal disch valve.

~ RCP A, AOV-270A

~ RCP B, AOV-270B

d. IF reactor trip was NOT required, THEN go to Step 4.

EOP:

REV 11 AP-RCP.1 RCP SEAL MALFUNCTION PAGE 5 of 10 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 2 Check RCP Seal Return Valve Alignment:

a. RCP seal return isolation valve, a. Perform the following:

MOV-313 - OPEN

1) Ensure CI reset.

2) Ensure both trains of XY relays for RCP seal return isolation valve, MOV-313, reset.

3) Open RCP seal return isolation valve, MOV-313.

IF MOV-313 can NOT be opened, THEN dispatch AO to AUX BLDG with RWST area key to check valve and breaker locally (breaker MCC C position 13J).

b. Verify RCP seal disch valves b. Manually open valves. IF valves OPEN can NOT be opened, THEN verify IA aligned to CNMT and go to

~ RCP A, AOV-270A Step 3.

~ RCP B, AOV-270B

I 0

f

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REV 11 AP-RCP. 1 RCP SEAL MALFUNCTXON PAGE 6 of 10 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: o If E-0 a reactor trip is initiated while performing Step 3, transition V

to should occur while completing subsequent actions of the step.

o The 0.8 GPM limit for ¹1 seal flow applies when the RCS is at normal operating pressure. Refer to Figure RCP SEAL LEAKOFF and consult plant staff for guidance if the RCS is at reduced pressure.

3 Check Total gl Seal Flow IF ¹1 Seal Inlet and Outlet BETWEEN 0.8 GPM AND 6.0 GPM temperatures are increasing, THEN perform the following:

a. IF reactor trip breakers closed, THEN trip the reactor.

b. Trip the affected RCP(s).

c. Allow 4 minutes for pump coast down, THEN close affected RCP(s) seal disch valve.

~ RCP A) AOV-270A

~ RCP B) AOV-270B IF ¹1 Seal Inlet and Outlet temperatures are stable, THEN perform the following while continuing with this procedure.

o IF total ¹1 Seal Flow greater than 6.0 gpm, THEN maintain seal injection flow rate of 9.0 GPM or greater to the affected RCP.

o IF total ¹1 Seal flow exceeds 8.0 GPM OR Seal Inlet/Outlet temperatures begin to increase, THEN return to Step 1.

o Prepare for orderly pump shutdown by placing the plant in Hot Shutdown using 0-2.1, NORMAL SHUTDOWN TO HOT SHUTDOWN.

o Secure the affected RCP with 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

EOP:

REV 11 AP-RCP. 1 RCP SEAL MALFUNCTION PAGE 7 of 10 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: Attachment RCP DIAGNOSTICS may be used to aid in diagnosis.

4 Check RCP Cooling: Perform the following:

o Annunciator A-7, RCP A CCW a. Verify RCP CCW supply and return RETURN HIGH TEMP OR LOW FLOW- valves open.

EXTINGUISHED

~ RCP A, MOV-749A and MOV-759A o Annunciator A-15, RCP B CCW ~ RCP B, MOV-749B and MOV>>759B RETURN HIGH TEMP OR LOW FLOW-EXTINGUISHED b. En'sure open CCW outlet valves from RCP thermal barriers.

~ RCP A, AOV-754A

~ RCP B, AOV-754B 5 Check RCP g2 Seal Indications: IF affected RCP ¹1 seal leakoff flow decreasing, THEN failure of ¹2 o Annunciator B-3, RCP A STANDPIPE seal may be indicated. Continue HI LEVEL +1 FT - EXTINGUISHED' plant operation while closely monitoring RCP seal indications.

Annunciator B-4, RCP B STANDPIPE HI LEVEL +1 FT - EXTINGUISHED

EOP. TITLE:

REV: 11 AP-RCP.1 RCP SEAL MALFUNCTION PAGE 8 of 10 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION REDUCING CHARGING FLOW'WILL RESULT IN INCREASING REGEN HX OUTLET TEMPERATURE.

6 Check RCP Labyrinth Seal D/Ps Perform the following:

- GREATER THAN 15 INCHES OF MATER a. Ensure open CCW outlet valves from RCP thermal barriers.

~ RCP A, AOV-754A

~ RCP B, AOV-754B

b. Verify seal injection flow greater than 5 GPM for affected RCP.

c. Adjust HCV-142 as necessary.

d. Dispatch AO to check seal injection filter D/P.

e. Check CCW surge tank level stable. IF level increasing, THEN go to AP-CCW.l, LEAKAGE INTO THE COMPONENT COOLING LOOP.

7 Check RCP g3 Seal Indications: Check CNMT radiation monitors normal.

o Annunciator B-ll, RCP A STAND PIPE LO LEVEL -4FT - EXTINGUISHED ~ R-11

~ R-12 o Annunciator B-12, RCP B STAND PIPE LO LEVEL -4FT - EXTINGUISHED IF RCP standpipe level low and CNMT radiation'increasing, THEN ¹ 3 seal leakage increase is probable.

Continue plant operation while closely monitoring RCP seal indications.

1'l F.OP: LITLE:

REV 11 AP-RCP.1 RCP SEAL MALFUNCTION PAGE 9 of 10 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: In the absence of other seal failure indications, an elevated ¹1 seal outlet temperature may indicate pump bearing damage.

• 8 Monitor Plant Conditions:

a. RCP ¹1 seal flow a. IF affected RCP running, THEN return to Step 1. IF NOT, THEN o Total ¹1 seal leakoff flow- perform the follow'ing:

LESS THAN 6.0 GPM

1) Monitor affected RCP (Refer o Total ¹1 seal flow - GREATER to Attachment RCP THAN 0.8 GPM DIAGNOSTICS).

2) Consult Plant Staff determine if cooldownto required.

b. RCP ¹1 Seal Flow - WITHIN THE b. Perform the following:

NORMAL OPERATING RANGE OF FIGURE RCP SEAL LEAKOFF o Ensure seal injection flow exceeds ¹1 seal leakoff flow.

o Refer to S-2.1, Reactor Coolant Pump Operation.

o Consult plant staff for further instructions.

c. RCP ¹1 seal outlet temperatures c. IF pump bearing damage is LESS THAN 215'ND STABLE suspected, THEN notify plant staff and expedite shutdown of the affected RCP. IF NOT, THEN return tc Step 1.

d. RCS leakage - NORMAL (Refer to d. Perform the following:

leakage surveillance sheet)

1) Calculate RCS leakrate.

2) Refer to ITS section 3.4e13.

T REV: 11 AP-RCP.1 RCP SEAL MALFUNCTION PAGE 10 of 10 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.

9 Notify Higher Supervision

-END-

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REV: 11 AP-RCP.1 RCP SEAL MALFUNCTION PAGE 1 of 1 AP-RCP.1 APPENDIX LIST TITLE PAGES r

1) FIGURE RCP SEAL LEAKOFF

2) ATTACHMENT RCP DIAGNOSTICS

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REV: 11 AP-RCP. 1 RCP SEAL MALFUNCTION PAGE 1 of 1 FIGURE RGP SEAL LEAKOFF O'I SEAL LEAK RATE (GPM) 6 LEAK RATE INCREMENTS 0.2 GPH NORMAL OPERATING RANGE DP INCREMENTS 50 PSI 250 500 750 1000 1250 1500 1750 2000 2250 2500 81 SEAL DP (RCS PRESS - VCT PRESS) PSI

EOP: 'f ITLE:

REV'

,P-TURB.5 RAPID LOAD REDUCTION PAGE 1 of 11 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW RES 0 SIBLE MANAGER EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:

0 EOP:

REV: 1

'P-TURB.5 RAPID LOAD REDUCTION PAGE 2 of 11 A. PURPOSE B. ENTRY CONDITIONS/SYMPTOMS

1. ENTRY CONDITIONS This procedure is entered from

a. The SS has determined that a rapid load reduction is required.

EOP: [ITl.E:

REV: 1 P-TURB.5 RAPID LOAD REDUCTION PAGE 3 of 11 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• • • • • • • • • • • • • x *

• x x

• x **x*x x **************

CAUTION o IF AT ANY TIME DURING THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS, THEN E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.

o IF MAIN FEEDWATER FLOW SHOULD DECREASE TO 25% OF FULL POWER VALUE

(.825 E+6 LBM/HR) PRIOR TO THE AMSAC SYSTEM AUTOMATICALLYBLOCKING, THEN A TURBINE TRIP AND AUX FEED PUMPS START COULD RESULT.

• • • • • • • • x *******x x x x

• x x x x x*x x **x*x****x**

NOTE: o This procedure is intended for use when the required load reduction rate is ) 1%/min.

o A maximum continuous load reduction rate of ) 5%/min would not normally be used unless otherwise directed by the Shift Supervisor.

• 1 Initiate Load Reduction

a. Verify ROD CONTROL BANK SELECTOR a. IF Auto Rod Control is SWITCH is in AUTOMATIC inoperable OR Manual Control is desired, THEN perform the following:

1) Place ROD CONTROL BANK SELECTOR SWITCH to MANUAL.

2) Insert Rods as necessary to match Tavg and Tref.

b. Reduce turbine load using Auto b. IF Auto Control is inoperable OR Turbine EH Control if desired Manual Control, is desired, THEN reduce turbine load in manual as

1) Select desired rate on desired.

thumbwheel

2) Reduce the setter to the desired load

3) Depress the GO button

c. Verify Steam Dump operating in c. Place Steam Dump in manual and auto, as required operate as necessary.

EOP: TITLE:

REV 1 P-TURB.5 RAPID LOAD REDUCTION PAGE 4 of 11 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• • • • • • • • • • • xx*x**x***x**x x x CAUTION x x x x x x*x x*x*xx EXTREME AND RAPID ROD MOTION TO MITIGATE TAVG SWINGS MAY RESULT IN LARGE POWER EXCURSIONS AND SHOULD BE AVOIDED.

• • • • • • • • • • • • • • xx****x*xx*x x x x x x x x*x x x*x*x 2 Monitor RCS Tavg Verify AUTO control rod motion as required. IF NOT, THEN place rod o Tavg - GREATER THAN 545'F control bank selector switch to MANUAL and adjust control rods as o Tavg - LESS THAN 578'F necessary.

IF Tavg is outside limits AND CANNOT be controlled, THEN trip the reactor and go to E-O, REACTOR TRIP OR SAFETY INJECTION.

NOTE: A thumb rule for initial boron addition is -2 gal/0 load reduction.

3 Add Boric Acid As Necessary To:

o Maintain or return a Flux to the target band o Maintain control rods above insertion limits o Match Tavg and Tref o Compensate for xenon

EOP:

P-TURB.5 TlTLE:

RAPID LOAD REDUCTION REV: l PAGE 5 of ll STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: It is permissible to operate RCPs for limited periods without seal injection, provided CCW is being supplied to the thermal barriers.

4 Check IA Available To CNMT Control PRZR level and pressure and follows:

o IA pressure - > 60 psig I o Adjust load reduction rate o Instr Air to CN>lT Isol Valve, AOV-5392 - OPEN o Ensure control rods are moving to control Tavg o Secure charging pumps if necessary o Operate proportional and backup heaters as required 5 Monitor Plant Parameters IF any parameter is approaching a CONTROLLING AT OR TRENDING TO trip setpoint AND CANNOT be PROGRAM VALUES controlled, THEN trip the reactor and go to E-O, REACTOR TRIP OR

~ PRZR Pressure SAFETY INJECTION.

~ PRZR Level

~ S/G Level NOTE: The load reduction should not be delayed to perform the remaining steps.

6 Check Pumps If Condensate Booster Should Be Secured

a. Power < 65% OR Trim Valve a. Go to Step 13.

V-9508G indicates > 80% open

b. Place the auto condensate booster pump to the trip position

c. Stop one condensate booster pump

d. WHEN the condensate system stabilizes, THEN stop the remaining condensate booster pump

EOP: I'ITLE:

REV: 1

'P-TURB.5 RAPID LOAD REDUCTION PAGE 6 of 11 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 7 Check Be If One Secured MFW Pump Should

a. Power < 50% a. Go to Step 13.

b. Verify at least one MFWP Seal b. Notify AO to start one MFWP Seal Booster pump in service Booster pump

c. Two MFW Pumps running c. Go to Step 8.

d. Close discharge valve for the pump to be secured

~ MFW Pump A - MOV-3977

~ MFW Pump B - MOV-3976

e. Stop the desired MFW Pump

f. Close the secured MFW pump recirc valve by placing the control switch in pull stop

g. Close the service water block valve to the secured MFW pump oil cooler

~ MFW Pump A - V-4701

~ MFW Pump B - V-4702 8 Verify Trim Valves Place controller in manual and Controlling Condensate System adjust pressure as necessary Pressure in Auto (300-375 PSIG)

EOP: T,I TLE:

REV: 1 P-TURB.5 RAPID LOAD REDUCTION PAGE 7 of 11 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 9 Check ANSAC System Status

a. Power < 35% (-150 psig first a. Go to Step 13.

stage pressure)

b. Verify AMSAC Auto Block Status b. Place AMSAC Manual Block switch Light is ON to the BLOCK position 10 Check Heater Drain Tank Pump Status

a. Generator load < 175 MWe a. Go to Step 13.

b. Stop one Heater Drain Tank Pump

c. WHEN Heater Drain Tank level control is stable, THEN stop the second Heater Drain Tank Pump 11 Check FW Flow Bypass Vlv Status

a. Power < 30% a. Go to Step 13.

b. FW Flow Bypass Vlvs in AUTO b. Perform the following:

~ HCV-480 1) Slowly open the FW Flow

~ HCV-481 Bypass Vlvs while verifying the associated FW Reg Vlv compensates by closing slightly

2) Place FW Flow Bypass Vlvs in AUTO

EOP:

REV 1 P-TURB.5 RAPID LOAD REDUCTION PAGE 8 of 11 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 12 Align Systems For Low Power Operation

a. Power < 30% a. Go to Step 13.

b. Place AOU-3959, CNDST Bypass Ulv to CLOSE

c. Place LC-107, Hotwell Level Control, to MANUAL

d. Generator load < 100 MWe d. Go to Step 13.

e. Open turbine drain valves 13 Evaluate Plant Status

a. Power stable at desired level a. IF power ) 20% and further reduction is required, THEN continue load reduction and return to Step 6.

IF power < 20% and further reduction is required, THEN refer to procedure 0-2.1, NORMAL SHUTDOWN TO HOT SHUTDOWN.

EOP: jITLE:

REV: 1 P-TURB.5 RAPID LOAD REDUCTION PAGE 9 of 11 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 14 Establish Stable Plant Conditions:

a. Tavg - TRENDING TO TREF a. Perform the following:

1) Verify AUTO control rod motion as, required. IF NOT, THEN place rod control bank selector switch to MANUAL and adjust control rods as necessary.

2) Borate if required reduction.

for power

b. PRZR pressure - TRENDING TO b. Verify proper operation of PRZR 2235 PSIG heaters and spray OR take manual control of PRZR pressure controller 431K. IF PRZR pressure can NOT be controlled, THEN refer to AP-PRZR.1, ABNORMAL PRESSURIZER PRESSURE.

c. PRZR level - TRENDING TO PROGRAM c. Verify proper operation of charging pump speed controllers OR take manual control of speed controllers to control PRZR level.

d. Rod insertion limit alarms d. Borate as necessary and withdraw EXTINGUISHED control rods to clear insertion limit alarms (refer to affected rod bank alarm response procedures if necessary).

e. Narrow range S/G levels e. Ensure MFW regulating valves TRENDING TO PROGRAM LEVEL controlling in AUTO, OR control feedwater in MANUAL.

EOP: TITLE:

REV' P-TURB.5 RAPID LOAD REDUCTION PAGE 10 of 11 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 15 Establish Normal Plant Conditions:

a. Verify EH control in OPER PAN a. IF conditions requiring manual and IMP IN operation have cleared, THEN place EH in OPER PAN and IMP IN.

b. Verify steam dump controller, HC-484, in AUTO at 1005 psig

c. Verify annunciator G-15, STEAM c. IF Tavg within 6'F of Tref, THEN DUMP ARMED - EXTINGUISHED perform the following:

1) Ensure steam dump valves closed.

2) Reset steam dump.

d. Verify PRZR presssure control in d. Place PRZR pressure control in AUTO AUTO as desired.

~ 431K master controller

~ PRZR spray valve controllers

~ PRZR heater controllers

e. Verify PRZR level control in AUTO) e. Place one charging pump speed controller in AUTO if desired.

f. Verify Rod Control Selector f. Place Rod Control Selector Switch in AUTO Switch in AUTO if desired.

NOTE: Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.

16 Notify Higher Supervision

FOP: %1TLE:

REV 1 P-TURB.5 RAPID LOAD REDUCTION PAGE 11 of 11 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 17 Refer to 0-5.1, LOAD REDUCTIONS, for additional "guidance 18 Return To Procedure Or Guidance In Effect

-END-

'I

~

P

I EOIa: TITLE:

REV: 5 ATT-9.0 ATTACHMENT LETDOWN PAGE 1 of 1 Superintendent . Y~. nate 7 A 'i A) The following conditions must be met to place either normal or excess letdown in service:

o IA to CNMT ESTABLISHED Q CCW IN SERVICE o PRZR level GREATER THAN 13%

B) Establish Normal Letdown:

1. Establish charging line flow to REGEN Hx GREATER THAN 20 gpm.

2. Place the following switches to CLOSE:

o Letdown orifice valves (AOV-200A, AOV-200B, and AOV-202) o AOV-427, loop B cold leg to REGEN Hx

3. Place letdown controllers in MANUAL at 40% open:

o Temperature control valve, TCV-130 o Pressure control valve, PCV-135

4. Verify AOV-371, letdown isolation valve OPEN.

5. Open loop B cold leg to REGEN Hx, AOV-427.

6. Open one 40 gpm letdown orifice valve (AOV-200A or AOV-200B).

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

8. Place PCV-135 in AUTO at 250 psig.

9. Adjust charging pump speed and HCV-142 as necessary to stablizie PRZR level and maintain RCP labyrinth seal D/P.

C) IF normal letdown can NOT be established, THEN establish excess letdown:

1. Place AOV-312 to NORMAL.

2. Ensure CCW from excess letdown Hx, (AOV-745) OPEN.

3. Open excess letdown isolation valve AOV-310.

4. Slowly open HCV-123 to maintain excess letdown temperature less than 195'F and pressure less than 100 psig.

1

5. Adjust charging pump speed as necessary to stabilize PRZR level and maintain RCP labyrinth .seal D/P.

~Hi $ PP

>/~a~~

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Revision 22 to Ginna Station Emergency Plan Implementing Procedure 5-2.

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