ML17263A194
| ML17263A194 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 03/24/1993 |
| From: | Marlow T ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17263A191 | List: |
| References | |
| AP-TURB.4, NUDOCS 9304080158 | |
| Download: ML17263A194 (20) | |
Text
EOP:
AP-TURB. 4 TITLE:
7 PAGE 1 of 8 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE P
T SUPERINTENDENT
-2( -9s EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
9304080158 930330 PDR 'DOCK 05000244 P
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AP-TURB. 4 LOSS OF CONDENSER VACUUM REV:
7 PAGE 2 of 8 A.
PURPOSE This procedure provides the necessary actions to control the plant with decreasing condenser vacuum.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from AP-CW.1, LOSS OF A CIRC WATER PUMP, when a circulating water system malfunction is indicated.
2.
SYMPTOMS The symptoms of LOSS OF CONDENSER VACUUM are; a.
Low or decreasing condenser vacuum, or b.
Annunciator J-16, MOTOR OFF CW-EH EMERG OIL SEAL OIL BU, lit, or c.
Annunciator H-7, CONDENSER HI PRESSURE, 25.5" HG, lit, or d.
PPCS high condenser backpressure alarm, or e.
Unexplained decreasing generator output.
EOP:
AP-TURB. 4 TITLE:
7 PAGE 3 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
IF, AT ANY TIME DURING THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS, E-Op REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
o EXCESSIVE BACK PRESSURE MAY RESULT IN THE LAST ROW OF TURBINE BLADES OPERATING AS A COMPRESSOR PRODUCING BLADE LOADING OPPOSITE TO THE DIRECTION OF ROTATION AND CAUSING SEVERE BLADE VIBRATION.
NOTE:
o PPCS backpressure readings (PBACK) should be verified by AO calculation from local readings for each condenser.
o Operation in the AVOID region should be limited to 20 minutes unless the cause of loss of vacuum has been corrected and backpressure is returning to normal.
1 Check Condenser Indications:
a.
Condenser vacuum GREATER THAN 20 INCHES HG
- b. Turbine back pressure EACH CONDENSER WITHIN LIMITS OF FIGURE BACK PRESSURE
- c. Condenser vacuum STABLE OR INCREASING
- a. Perform the following:
- 1) Verify turbine trip.
2)
Go to AP-TURB.l, TURBINE TRIP WITHOUT RX TRIP REQUIRED, or
'-O, REACTOR TRIP or SAFETY INJECTION, as required.
- b. IF in the AVOID region, THEN ad]ust turbine load (at 1%/min) as necessary to return to the safe operating region.
IF in the DO NOT OPERATE region, THEN trip the reactor and go to E-O, REACTOR TRIP OR SAFETY INJECTION.
- c. Decrease generator load as necessary to stabilize condenser vacuum.
IF vacuum can NOT be stabilized, THEN perform the following:
- 1) Decrease generator load to minimum.
- 2) Trip turbine.
3)
Go to AP-TURB.1, TURBINE TRIP WITHOUT RX TRIP REQUIRED.
AP-TURB - 4 LOSS OF CONDENSER VACUUM REV:
7 PAGE 4 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT. OBTAINED 2
Dispatch AO To Perform Local Actions (Refer to Attachment COND VACUUM) 3 Check Condenser Circulating Water System - OPERATING AS REQUIRED IF a loss of circulating water has
- occurred, THEN go to AP-CW.1, LOSS OF A CIRC WATER PUMP:
o CW pump discharge valves BOTH OPEN o
CW pumps BOTH RUNNING
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AP-TURB.4 TI TLE:
7 PAGE 5'of 8
STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
D/P LIMITS ON THE GENERATOR HYDROGEN COOLER AND CONDENSATE COOLER SHOULD NOT BE EXCEEDED (D/P LIMITS INDICTED AT D/P METERS AT MCB REAR).
o CLOSELY MONITOR FEED PUMP SUCTION PRESSURE WHEN ADJUSTING CONDENSATE COOLING VALVES.
4 Check Condensate Temperature
- LESS THAN 100'F (PPCS point ID T2053)
Perform the following:
a.
Place S/G blowdown and sample valve master isolation switch to CLOSE.
- b. IF condensate cooler in service, THEN perform the following:
l) Place generator hydrogen temperature controller in MANUAL at 50%.
- 2) Dispatch AO to throttle close condensate cooler bypass valve as necessary.
- 3) Ad]ust hydrogen temperature controller and condensate cooler manual bypass valve as necessary to establish maximum condensate cooling.
5 Check, Condenser For Air Inleakage - NO INLEAKAGE DETECTED IF condenser inleakage is detected, THEN perform the following:
- a. Isolate if possible.
b, IF inleakage can NOT be
- isolated, THEN go to Step 6.
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EOP AP-TURB-4 TITLE:
7 PAGE 6 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6
Monitor Condenser Indications:
o Condenser back pressure
- LESS THAN FIGURE BACK PRESSURE Return to Step 1.
o Vacuum - STABLE OR INCREASING 7
Establish Stable Plant Conditions:
a.
Tavg - TRENDING TO TREF b.
PRZR pressure
- TRENDING TO 2235 PSIG
- a. Ad)ust control rods and turbine load as necessary to restore 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.
S/G level - TRENDING TO PROGRAM
- d. IF S/G levels NOT controlling in AUTO, THEN place affected main feed regulating valve(s) in manual and restore S/G level(s) to program.
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AP-TURB. 4 TITLE:
7 PAGE 7 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 8 Establish Normal Plant Operation:
- a. Verify EH control in AUTO IMP IN a.
Place EH in AUTO IMP IN if desired.
- b. Verify annunciator G-15, STEAM DUMP ARMED - EXTINGUISHED b, IF'avg within 6'F of Tref, THEN perform the following:
- 1) Ensure steam dump valves closed.
- c. Verify charging pump speed control in AUTO
- d. Verify Rod Control Selector Switch in AUTO
- 2) Reset steam dump.
- c. Place charging pump speed control in AUTO if desired.
- d. Place Rod Control Selector Switch in AUTO if desired.
- e. Dispatch AO to remove priming e)ector from service if desired
- f. Verify S/G blowdown and sample valve master isolation switch in REMOTE
- f. Perform the following:
- 1) Dispatch AO to locally isolate blowdown.
2)
WHEN blowdown locally
- isolated, THEN place blowdown and sample valve master switch to REMOTE.
- 3) Direct AO to restore blowdown flow (Refer to T-14F, S/G BLOWDOWN SYSTEM STARTUP).
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AP-TURB. 4 LOSS OF CONDENSER VACUUM REV 7
PAGE 8 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 9 Notify Higher Supervision 10 Return To Procedure Or Guidance In Effect
-END-
F.OP I AP>>TURB. 4 TITLE:
LOSS PF CONDENSER VACUUM REV:
7 PAGE 1 of 1 AP-TURB. 4 APPENDIX LIST TITLE
'PAGES 1)
FIGURE BACK PRESSURE 2)
ATTACHMENT COND VACUUM
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AP-TURB 4 T1TLE:
LOSS OF CONDENSER VA~
REV:
7 PAGE.1 of 1 BACK PRESSURE (inches Hg) 7 INCREMENTS 0.2 inches Hg FIGURE BACK'RESSURE DO NOT OPERATE IN THIS REGION COMPUTER ADDRESS BAROMETRIC PRESS.-P3200HG CONDENSER VACUUM - P3201 BACK PRESSURE PBACK OR USE AUX. OPERATOR CALC.
AVOID OPERATION IN THIS REGION SATISFACTORY OPERATING REGION INCREMENTS 20 MW 100 200 300 400 GROSS ELECTRIC (MW) 500 600
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