ML17263A304
| ML17263A304 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 05/07/1993 |
| From: | Marlow T ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17263A305 | List: |
| References | |
| AP-TURB.1, NUDOCS 9306040151 | |
| Download: ML17263A304 (19) | |
Text
EOP:
P-TURB.1 TITLE:
TURBINE TRIP WITHOUT RX TRIP REQUIRED REV:
7 PAGE 1 of 12 ROCHESTER GAS AND ELECTRIC ORPORATION GINNA STAT ON CONTROLLED COPY BER TECHNICAL REVIEW PORC VIEW DATE P
T SUPERINTENDENT EFF TIVE DATE CAT G RY 1.0 REVIEWED BY:
9306040i5i 930524 PDR ADQCK 05000244 P
PDR L
\\ ~
EOP:
P-TURB.'1 TITLE:
TURBINE TRIP WITHOUT RX TRIP REQUIRED REV 7
PAGE 2 of 12 A.
PURPOSE - This procedure provides the necessary instructions to control the plant following a turbine trip without a reactor trip required.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from:
a.
AP-CW.1, LOSS OF A CIRC WATER PUMP, or, b.
AP-ELEC.l, LOSS OF 12A AND/OR 12B TRANSFORMER, or, c ~
AP FW 1 g PARTIAL OR COMPLETE LOSS OF MAIN FEE DWATERg or, d.
AP-TURB.2, AUTOMATIC TURBINE RUNBACK, or, e.
AP-TURB.3, TURBINE VIBRATIONS, or, f.
AP-TURB.4, LOSS OF CONDENSER VACUUM, when power is less than P-9 and the turbine trips without a Rx trip.
2.
SYMPTOMS The symptoms of TURBINE TRIP WITHOUT RX TRIP REQUIRED are:
a ~
b.
c ~
d.
e.
gi Annunciator K-l, THRUST BEARING FAILURE, lit, or Annunciator K-9, TURBINE BEARING OIL LO PRESS TRIP 6 psi, lit, or Annunciator K-17, TURBINE LOW VACUUM TRIP 20" HG, lit, or Annunciator K-18, MAIN FEEDWATER PUMPS TRIPPED, lit, or Annunciator K-26, GENERATOR LOCKOUT RELAY, lit, or Annunciator K-25, TURBINE OVERSPEED ALERT 1980
- RPM, lit, or Annunciator F-21, COND HI PRESS 20" HG OR LOSS OF BOTH CIRC WTR PMPS, lit, or h.
Annunciator K-3, AMSAC ACTUATED, lit.
~
l T
EOP:
P-TURB;1 TITLE:
TURBINE TRIP WITHOUT RX TRIP REQUIRED REV 7
PAGE 3 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF, AT ANY TIME DURING THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS, E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
1 Verify Turbine Stop Valves CLOSED Manually trip turbine.
IF turbine stop valves can NOT be
- closed, THEN close both MSIVs.
IF reactor power greater than 8%
with both MSIVs closed, THEN manually trip the reactor and go to E-O, REACTOR TRIP OR SAFETY INJECTION.
EOP:
P-'TURB; 1 T!TLE:
TURBINE TRIP WITHOUT RX TRIP REQUIRED REV:
7 PAGE 4 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION PRZR PRESSURE LOW PRESSURE TRIP IS RATE SENSITIVE, THEREFORE, MONITOR PRESSURE WHEN REDUCING RCS TEMPERATURE.
NOTE:
Automatic rod control is desired, if available.
2 Check Reactor, Power:
a.
NIS intermediate ranges
- ABOVE THE POINT OF ADDING HEAT (APPROXIMATELY 2.5xlO 6 AMPS) a.
Go to Step 3.
- b. Verify control rods driving in to reduce reactor power in AUTO
- b. Perform the following:
l) Ensure ROD CONTROL BANK SELECTOR switch to MANUAL
- 2) Insert rods as necessary to reduce reactor power.
- c. Borate as necessary to maintain control rods above rod insertion limits
EOP:
P-TURB;1 TURBINE TRIP WITHOUT RX TRIP REQUIRED REV:
7 PAGE 5 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 3
Monitor S/G Levels:
- a. Levels GREATER THAN 30%
OR INCREASING
- a. IF MFW regulating and bypass valves NOT controlling in AUTO, THEN place controllers in MANUAL and restore narrow range level to program.
IF S/G level can NOT be
- restored, THEN trip the reactor and go to E-O, REACTOR TRIP OR SAFETY INJECTION.
- b. Levels
- TRENDING TO PROGRAM
- b. IF S/G level above program and increasing uncontrolled, THEN place controller(s) in MANUAL and decrease flow as necessary.
IF flow can NOT be controlled, THEN perform the following:
l) Trip the reactor.
- 2) Stop the running MFW pump.
- 3) Close MFW pump discharge valves.
4)
Go to E-O, REACTOR TRIP OR SAFETY INJECTION.
EOP:
P.~TURB; 1 TURBINE TRIP WITHOUT RX TRIP REQUIRED REV:
7 PAGE 6 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4 Verify Proper Operation Of Steam Dump:
- a. Verify annunciator G-15, STEAM DUMP ARMED - LIT a.
Place steam dump mode selector switch to MANUAL.
- b. Condenser steam dump operating in AUTO
- b. IF steam dump NOT available, THEN perform the following:
- 1) Adjust S/G ARV setpoints to 1005 psig and verify proper operation.
- 2) IF power is greater than 8%,
THEN ensure reactor trip and go to E-O, REACTOR TRIP OR SAFETY INJECTION.
- c. Tavg - TRENDING TO PROGRAM
- c. IF Tavg can NOT be controlled, THEN manually trip the reactor and go to E-O, REACTOR TRIP OR SAFETY INJECTION.
5 Check PRZR Pressure TRENDING TO 2235 PSIG IF PRZR pressure can NOT be controlled, THEN refer to AP-PRZR.1, ABNORMAL PRESSURIZER PRESSURE.
EOP:
P-TURB;1 TITLE:
TURBINE TRIP WITHOUT RX TRIP REQUIRED REV:
7 PAGE 7 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6
Check PRZR Level:
- a. Level -
GREATER THAN 13%
a.
Perform the following:
- 1) Place loop B cold leg isolation valve to REGEN Hx (AOV-427) switch to CLOSE.
- 2) Place letdown orifice valve switches to CLOSE (AOV-200A, AOV-200B, and AOV-202).
- 3) Verify excess letdown isolation valve (AOV-310) closed.
- 4) Ensure PRZR heaters off.
- 5) Control charging to restore PRZR level greater than 13%.
6)
WHEN PRZR level greater than 13%,
THEN restore letdown.
- b. Level - TRENDING TO PROGRAM
'b. Increase charging flow as necessary to restore PRZR level to program.
EOP:
P-TURB;1 T1jLE:
TURBINE TRIP WITHOUT RX TRIP REQUIRED REV 7
PAGE 8 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 7
Check MFW System:
- a. Verify MFW regulating and bypass valves OPERATING IN AUTO b.
MFW pumps BOTH RUNNING
- c. Close one MFW pump discharge valve a.
Place MFW regulating and bypass valve controllers in MANUAL and restore S/G level.
- b. Perform the following:
- 1) Verify one MFW pump running.
IF NOT, THEN verify both MDAFW pumps running.
2)
Go to Step 8.
- d. Stop selected MFW pump 8 Establish Stable Plant Conditions:
- a. Place rod control bank selector in MANUAL b.
NIS intermediate ranges BELOW THE POINT OF ADDING HEAT (APPROXIMATELY 2.5x10 AMPS)
- b. Return to Step 2.
c.
PRZR pressure BETWEEN 2220 PSIG AND 2260 PSIG d.
PRZR level - TRENDING TO PROGRAM e.
S/G levels
- TRENDING TO PROGRAM f.
RCS Tavg -
GREATER THAN 540'F
- c. Control PRZR heaters and spray as necessary.
- d. Control charging as necessary.
- e. Control S/G feed flow as necessary.
- f. Control dumping steam as necessary.
IF cooldown continues, THEN close both MSIVs.
A
~
~
EOP:
P-WRB:1 T1TLE:
TURBINE TRIP WITHOUT RX TRIP REQUIRED REV 7
PAGE 9 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF ANY S/G LEVEL ABOVE PROGRAM, THEN AFW FLOW MAY BE THROTTLED IMMEDIATELYTO PREVENT S/G ISOLATION.
NOTE:
Maintain Reactor power less than 2%.
This is within the capacity of MDAFW pumps.
4 9
Check S/G Feed Flow Status:
- a. Manually start both MDAFW pumps
- b. Verify AFW flow - ESTABLISHED
- c. Verify MFW flow control valves CLOSED
~ MFW regulating valves
~ MFW bypass valves
- d. Close MFW pump discharge valves
~ MOV-3977, A MFW pump
~ MOV~976, B MFW pump e.
Stop any running MFW pump and place in PULL STOP
- f. Check S/G level
- TRENDING TO 39%
- b. Perform the following:
IF MFW NOT available, THEN manually start TDAFW pump and establish flow as necessary.
2)
Go to Step 10.
- c. Place A and B MFW regulating and bypass valve controllers in manual at 0% demand.
- f. Adjust MDAFW pump flow as necessary to restore S/G level.
EOP:
P~ TURB."1 TITLE:
TURBINE TRIP WITHOUT RX TRIP REQUIRED REV:
7 PAGE 10 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION WHEN FEEDING BOTH S/G(S)
USING ONE MDAFW PUMP, THEN THE SUM OF THE FLOWS TO BOTH S/G(S)
MUST BE LESS THAN 230 GPM.
10 Establish Normal AFW Pump Shutdown Alignment:
- b. Verify the following:
o Both S/G levels STABLE OR INCREASING
- b. Continue with Step ll.
WHEN conditions met, THEN do Steps 10c through f.
o Total AFW flow -
LESS THAN 200 GPM
- c. Close MDAFW pump discharge valves
~ MOV-4007
~ MOV-4008
- d. Stop all but one MDAFW pump e.
Open AFW discharge crossover valves
~ MOV-4000A
~ MOV-4000B
- f. Open AFW bypass valves as necessary to control S/G levels
~ AOV-4480
~ AOV-4481
EOP:
TITLE:
TURBINE TRIP WITHOUT RX TRIP REQUIRED REV:
7 PAGE 11 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 11 Establish Normal Shutdown Alignment:
a.
Check condenser
- AVAILABLE
- a. Dispatch AO to perform Attachment SD-2.
- b. Perform the following as necessary:
o Open generator disconnects
~ 1G13A71
~ 9X13A73 o
Place voltage regulator to OFF o
Open turbine drain valves o
Rotate reheater steam supply controller cern to close valves o
Place reheater dump valve switches to HAND o
Stop all but one condensate pump
- c. Verify Bus llA and Bus llB energized BOTH BUSSES GREATER THAN 4 KV
- c. IF either bus NOT energized, THEN refer to 0-6.9.2, ESTABLISHING AND/OR TRANSFERRING OFFSITE POWER TO BUS 12A/
BUS 12B.
- d. Dispatch AO to perform Attachment SD-1
('
EOP:
II PERTURB;1 TURBINE TRIP WITHOUT RX TRIP REQUIRED REV 7
PAGE 12 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.
12 Notify Higher Supervision 13 Establish Desired Plant Conditions:
- a. Reactor shutdown
- DESIRED
- a. IF turbine is to be restored to
- service, THEN maintain reactor critical and refer to 0-1.2, PLANT FROM HOT SHUTDOWN TO STEADY LOAD.
- b. Refer to 0-2.1, NORMAL SHUTDOWN TO HOT SHUTDOWN
-END-
0
~J 0
EOP:
TURBINE TRIP WITHOUT RX TRIP REQUIRED REV:
7 PAGE 1 of 1
AP-TURB.1 APPENDIX LIST TITLE PAGES 1) 2)
ATTACHMENT SD-1 ATTACHMENT SD-2