ML17263A258
| ML17263A258 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 04/14/1993 |
| From: | Marlow T ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17263A255 | List: |
| References | |
| AP-FW.1, NUDOCS 9305140019 | |
| Download: ML17263A258 (28) | |
Text
EOP:
AP-FW,. 1 TITLE PARTIAL OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 1 of 11 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE
/
P T SUPERIN ENDENT qS-EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
9305140019 930505 PDR
- DOCK 00000244 F
C
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AP-FW. 1 TITLE-PARTIAL OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 2 of 11 A.
PURPOSE This procedure provides the steps necessary to respond to a MFW system malfunction resulting in a decrease in or complete loss of main feedwater.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
SYMPTOMS The symptoms of PARTIAL OR COMPLETE LOSS OF OF MAIN FEEDWATER are; a.
Annunciator G-3(5),
S/G A(B) LEVEL DEVIATION f7%,
lit, or b.
Annunciator G-19(21),
S/G A (B)
FLOW MISMATCH, lit, or c.
Annunciator G-20, ADFCS SYSTEM SWITCH TO MANUAL, lit, or d.
Annunciator K-18, MAIN FEEDWATER PUMPS TRIPPED, lit, or e.
Low indicated MFW pump suction flow on 1 pump, or f.
MFW pump indicates tripped, or g.
MFW pump discharge valve indicates shut.
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AP-FW. 1 TITLE:
PARTIAL OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 4 of 11 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 2 Verify At Least One MFW Pump RUNNING Perform the following:
- a. Start all 3 AFW pumps and verify flow.
- b. IF turbine previously latched, THEN verify turbine trip and go to AP-TURB.l, TURBINE TRIP WITHOUT RX TRIP REQUIRED OR E-O, REACTOR TRIP or SAFETY INJECTION.
IF turbine NOT previously
- latched, THEN perform the following:
- 1) Reduce reactor power to less than 2%.
2)
Go to Step 11.
3 Verify MFW Pump Suction Pressure GREATER THAN 185 PSIG Perform the following,:
- a. Verify standby condensate pump running, if required.
- b. Verify condensate bypass valve open.
- c. Place Hotwell level controller in HANUAL at 50%.
- d. Place trim valve controller to manual and close trim valves.
e.
Check if condensate booster pumps have tripped and start as necessary.
iO EOP:
AP-FW. 1 TITLE:
PARTIAL OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 3 of 11 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF, AT ANY TIME DURING -THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS, E-0>
REACTOR, TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
1 Check MFW Requirements:
a.
Power
- GREATER THAN 50%
- b. Both MFW pumps
- RUNNING
- a. IF power less than 50%,
THEN go to Step 2.
- b. IF only one MFW pump has
- tripped, THEN perform the following:
- 1) Start all 3 AFW pumps and verify flow.
- 2) Decrease power rapidly to less than 50%.
3)
Go to Step 3.
IF both MFW pumps have tripped, THEN ensure reactor trip and go to E-O, REACTOR TRIP OR SAFETY INJECTION.
c.
Go to Step 3
Q
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AP-FW. 1 TITLE:
PARTIAL OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 5 of 11 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4 Verify Adequate MFW Plow:
o A MFW flow -
GREATER THAN OR EQUAL TO A STEAM FLOW o
B MFW flow - GREATER THAN OR EQUAL TO B STEAM FLOW Check MFW regulating valves controlling in AUTO.
IF NOT, THEN control MFW flow in MANUAL.
IF MFW flow can NOT be controlled, THEN, trip the turbine and go to AP-TURB.1, TURBINE TRIP WITHOUT RX TRIP REQUIRED, or E-O, REACTOR TRIP OR SAFETY INJECTION.
5 Check S/G Levels:
o Levels GREATER THAN 17%
o Levels
- TRENDING TO PROGRAM I
IF S/G levels can NOT be restored, THEN trip the reactor AND go to E-O, REACTOR TRIP OR SAFETY INJECTION.
I
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AP-FW. 1 TITLE:
PARTIAL OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 6 of 11 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6 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 for power reduction.
b.
PRZR pressure
- TRENDING TO 2235 PSIG
- b. Verify proper operation of PRZR 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 EXTINGUISHED
- e. Narrow range S/G levels-TRENDING TO PROGRAM LEVEL
- d. Borate as necessary and withdraw control rods to clear insertion limit alarms (refer to affected rod bank alarm response procedures if necessary).
e.
Ensure MFW regulating valves controlling in AUTO, OR control feed water in MANUAL.
J
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AP-FW. 1 TITLE:
PARTIAL OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 7 of ll STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 7
Check Status Of MFW System:
a.
Check MFW pump suction pressure:
- a. Return to Step 3.
o Pressure
- GREATER THAN 200 PSIG o
Pressure
- STABLE
- b. Automatic feedwater control-AVAILABLE
- b. Continue with Step 8,
WHEN malfunction identified, THEN do Steps 7c.
- c. Restore feedwater control system to AUTO if necessary 8
Check Status Of Condensate System:
- a. Verify condensate bypass valve CLOSED a.
WHEN conditions permit, THEN close valve.
- b. Verify hotwell level - AT SETPOINT
- b. Manually restore hotwell level to setpoint.
- c. Place hotwell level controller in AUTO
- d. Stop condensate pump if desired
- e. Verify trim valves in AUTO
- e. Adjust trim valve controller to desired pressure and place controller in AUTO.
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AP-FW. 1 TITLE:
PARTIAL"OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 8 of 11 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 9 Establish Normal Plant Conditions:
- a. Verify EH control in OPER PAN and IMP IN
- a. IF conditions requiring runback 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 DUMP ARMED - EXTINGUISHED
- c. IF Tavg within 6'F of Tref, THEN perform the following:
- 1) Ensure steam dump valves closed.
- d. Verify PRZR presssure control in AUTO
- 2) Reset steam dump.
- d. Place PRZR pressure control 'in 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 Switch in AUTO
- f. Place Rod Control Selector Switch in AUTO if desired.
'1\\\\0
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AP-FW. 1 TITLE:
PARTIAL OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 9 of 11 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 10 Restore AFW System To Auto Standby:
- a. Verify S/G level
- TRENDING TO PROGRAM
- b. Close TDAFW pump steam supply valves
- a. IF level low, THEN return to Step 4.
WHEN S/G levels return to program, THEN do Steps 10b through f.
- c. Stop MDAFW pumps and place switches in AUTO
- d. Verify AFW pump discharge valves OPEN
- d. Manually open valves.
~ MOV-4007
~ MOV-4008
~ MOV-3996
- e. Verify TDAFW pump flow control valves OPEN
- e. Manually open valves.
~ AOV-4297
~ AOV-4298 f.
Go to Step 12
.4)
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AP-FW. 1 TITLE:
PARTIAL OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 10 of 11 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED ll Establish Stable Plant Conditions:
- a. Verify reactor power LESS THAN 2%
/
b, PRZR pressure
- TRENDING TO 2235 PSIG c.
PRZR level - TRENDING TO PROGRAM
- a. Insert control rods as necessary to reduce reactor power to less than 2%.
- b. Verify proper operation of PRZR heaters and spray OR take manual control of PRZR pressure controller 431K.
IF pressure can NOT be controlled, THEN refer to AP-PRZR.l, ABNORMAL PRESSURIZER PRESSURE.
- 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
'XTINGUISHED
- d. IF the reactor is to remain
- critical, THEN borate as necessary and withdraw control rods to clear insertion limit alarms (refer to affected rod bank alarm response procedures if necessary).
- e. Tavg - STABLE AT APPROXIMATELY 547'F
- f. Narrow range S/G levels-TRENDING TO PROGRAM LEVEL
- e. Verify proper operation of steam dump OR manually control steam dump as necessary.
- f. Verify MDAFW pumps operating as necessary to restore S/G level to program.
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AP-FW. 1 TITLE:
PARTIAL OR COMPLETE LOSS OF MAIN FEEDWATER REV:
9 PAGE 11 of 11 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.
12 Notify Higher Supervision 13 Return To Procedure Or Guidance In Effect
-END-
EOP:
P-,TURB.2 TITLE:
TURBINE LOAD REJECTION REV:
13 PAGE 1 of 9
ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE PLANT SUPERINTENDENT
+-~~w~
EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
EOP:
P-,TURB.2 TURBINE "LOAD REJECTION REV:
13 PAGE 2 of 9 A.
PURPOSE This procedure provides the guidance necessary to control the plant during a transient resulting from an unanticipated turbine/secondary plant load decrease.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
SYMPTOMS The symptoms of TURBINE LOAD REJECTION are; a.
Annunciator F-30, OPaT TURBINE RUNBACK, lit, or b.
Annunciator F-31, OTaT TURBINE RUNBACK, lit, or c.
Unexplained decrease in main generator output.
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P-,TURB.2 TITLE TURBINE LOAD REJECTION REV 13 PAGE 3 of 9
STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
- * * * * * * * *,4 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- CAUTION o
IF, AT ANY TIME DURING THIS PROCEDURE, A REACTOR TRIP OR SI
- OCCURS, E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
o ANY hT RUNBACK SIGNAL WILL BLOCK AUTO AND MANUAL OUT MOTION OF ROD CONTROL SYSTEM.
l Check Rod Control:
Perform the following:
o ROD CONTROL BANK SELECTOR switch in AUTO a.
Ensure ROD CONTROL BANK SELECTOR switch in MANUAL.
o Control rods stepping in as required
- b. Insert control rods as necessary to restore Tavg to Tref.
~ I I
~
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P-.TURB. 2 TURBINE LOAD REJECTION REV:
13 PAGE 4 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 2
Check Steam Dump Status:
- a. Annunciator F-15, RCS TAVG DEV, EXTINGUISHED a.
Perform the following:
- 1) Place STEAM DUMP MODE SELECTOR Switch to MANUAL.
- 2) Place steam dump controller, HC-484, to MANUAL.
b.
Steam dump armed and operating:
o Annunciator G-15, STEAM DUMP ARMED - LIT o
Steam dump operating to restore Tavg to within 6'F of Tref
- 3) Operate steam dump valves manually as necessary.
4)
Go to Step 3.
- b. IF steam dump required but NOT operating, THEN perform the following:
- 1) Place STEAM DUMP MODE SELECTOR Switch to MANUAL.
- 2) Place steam dump controller, HC-484, to MANUAL.
- 3) Operate steam dump valves manually as necessary.
3 Verify Tavg TRENDING TO TREF Place ROD CONTROL BANK SELECTOR switch to MANUAL and insert control rods as necessary to restore Tavg to Tref.
EOP:
P-,TURB.2 TURBINE LOAD REJECTION REV:
13 PAGE '5 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4 Check Turbine Runback Criteria:
a.
Any hT annunciator
- LIT
~ F-30, OPBT TURBINE RUNBACK
~ F-31, OTBT TURBINE RUNBACK a.
Go to Step 5.
b.
hT runback occurring as required
- b. Place EH in NANUAL and reduce turbine load as necessary.
NOTE: If the cause of the runback is diagnosed as a failed channel, and is continuing, the turbine may be placed in manual to terminate the runback when ( 75% reactor power.
5 Check Turbine Power STABLE Determine cause of continued power reduction and stabilize load if possible.
6 Check Main Generator Load GREATER THAN 15 MW IF load can NOT be stabilized above 15 MW, THEN trip turbine and go to AP-TURB.1, TURBINE TRIP WITHOUT RX TRIP REQUIRED, Step 1.
EOP:
P-,TURB.2 TITLE:
TURBINE LOAD REJECTION REV:
13 PAGE 6 of 9
STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED x x ****************
CAUTION IF STEAM DUMP CONTINUES FOR A SIGNIFICANT LENGTH OF TIME, CONDENSATE TEMPERATURE AND CONDENSER BACK PRESSURE SHOULD BE MONITORED.
7 Establish Stable Plant Conditions:
a.
Tavg
- TRENDING TO TREF b.
PRZR pressure
- TRENDING TO 2235 PSIG
- 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 PRZR pressure controller 431K.
IF 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.
Steam dump valves CLOSED d.
Ensure proper operation of steam dump control system.
EOP:
P;TURB.2 TURBINE LOAD REJECTION REV:
13 PAGE 7 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 8
Check REGEN Hx Letdown Indications:
o Annunciator A-4, REGEN HX LETDOWN OUT HI TEMP 395'F-EXTINGUISHED o
REGEN Hx letdown outlet temperature STABLE OR DECREASING Adjust charging flow and HCV-142 as necessary to control REGEN Hx letdown outlet temperature.
IF REGEN Hx letdown outlet temperature can NOT be controlled, THEN perform the following:
a.
Close all letdown orifice valves (AOV-200A, AOV-200B and AOV-202).
- b. Close loop B to REGEN Hx isolation valve (AOV-427).
9 Verify Cause Of Turbine Load Rejection IDENTIFIED Attempt to determine and correct'ause of turbine load rejection.
EOP:
P;TURB.2 TITLE:
TURBINE LOAD REJECTION REV 13 PAGE 8 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 10 Establish Normal Plant Conditions:
- a. Verify EH control in AUTO IMP IN
- a. IF cause of load rej ection is corrected, THEN place EH in AUTO IMP IN.
- b. Verify steam dump controller, HC-484, in AUTO at 1005 psig
- c. Verify annunciator G-15, STEAM DUMP ARMED - EXTINGUISHED
- c. IF Tavg within 6'F of Tref, THEN perform the following:
- 1) Ensure steam dump valves closed.
d.
Rod insertion limit alarms EXTINGUISHED e.
NIS PR DI - WITHIN +
5%
OF TARGET VALUE
- 2) Reset steam dump.
- d. IF any BT channel failed, THEN determine actual RIL from Tech Spec figure 3.10-1.
IF alarm
- valid, THEN borate as necessary and withdraw control rods to clear insertion limit alarms (refer to affected rod bank alarm response procedures if necessary).
- e. Borate/dilute to restore bI to within limits.
- f. Verify charging pump speed control in AUTO
- f. Place charging pump speed control in AUTO if desired.
- g. Verify Rod Control Selector Switch in AUTO
- g. Place Rod Control Selector Switch in AUTO if desired.
EOP:
P-TURB.2 TURBINE LOAD REJECTION REV 13 PAGE 9 of 9
STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.
ll Notify Higher Supervision 12 Return To Procedure Or Guidance In Effect
-END-