Sunday, May 31, 2020
Shut-Down Procedure: 500 MW (Planned Shutdown)
Shut-Down Procedure: 500 MW
- Reduce load from 500 MW to 400 MW
- Gradualy Reduce Pr SP from 170 ksc to 130 ksc, Load is still 400 MW
- Take unit of TFM
Saturday, May 30, 2020
Thursday, May 21, 2020
Hydrogen Purging
Pre-Purging checklist:
1. The generator may be on barring gear or at standstill. Preferably be on barring speed of around 50-80rpm (without condenser vacuum).
At least 60 CO2 filled cylinders should be available in the unit where purging is to be done.
Arrangement for filling hot water on CO2 cylinder / lines (to avoid freezing) is to be ready.
1. The generator may be on barring gear or at standstill. Preferably be on barring speed of around 50-80rpm (without condenser vacuum).
At least 60 CO2 filled cylinders should be available in the unit where purging is to be done.
Arrangement for filling hot water on CO2 cylinder / lines (to avoid freezing) is to be ready.
Loss of Instrument Air
Loss of Instrument Air
Anticipated Problems:
1. No oil burner can be taken in service. Oil guns, oil/steam valves will remain inoperative.
The igniter will not get advance.
Anticipated Problems:
1. No oil burner can be taken in service. Oil guns, oil/steam valves will remain inoperative.
The igniter will not get advance.
Vacuum Pulling Process
Vacuum Pulling Process
1 Ensure permit cancellation on Vacuum pump/Flash Tank related MOV/Condensate system & Clearance for vacuum pulling.
1 Ensure permit cancellation on Vacuum pump/Flash Tank related MOV/Condensate system & Clearance for vacuum pulling.
Mill Fire
Mill Fire
a) Fire in mill under shut down:
Isolate the mill totally from air side by closing cold/hot air dampers & gates and mill seal air valves.
a) Fire in mill under shut down:
Isolate the mill totally from air side by closing cold/hot air dampers & gates and mill seal air valves.
Shutdown Instructions
Shutdown Instructions
1 Ensure UT change over before tripping of boiler/ turbine.
2 Ensure 400 KV breaker are opened after unit tripping.
1 Ensure UT change over before tripping of boiler/ turbine.
2 Ensure 400 KV breaker are opened after unit tripping.
UPS Failure
UPS Failure
CONSEQUENCES OF 240 VOLT UPS SUPPLY FAILURE:-
All LVS supplies from main UPS will not be available but from mini UPS supply will be
available for around 2 hours .
CONSEQUENCES OF 240 VOLT UPS SUPPLY FAILURE:-
All LVS supplies from main UPS will not be available but from mini UPS supply will be
available for around 2 hours .
Boiler forced Cooling
Boiler Forced Cooling
1 In case of Tube leakage
1.1 After Tripping the boiler ,stop FD fan and keep ID fan running at
minimum load and ensure furnace pressure negative inside boiler.
1 In case of Tube leakage
1.1 After Tripping the boiler ,stop FD fan and keep ID fan running at
minimum load and ensure furnace pressure negative inside boiler.
CC(BCW) Pump Isolation & Purging
CC(BCW) Pump Isolation & Purging
1. ISOLATION OF CC PUMP REMARKS
1.1 Remove from Stand by mode if it is in auto
1.2 Stop CC pump if running
1. ISOLATION OF CC PUMP REMARKS
1.1 Remove from Stand by mode if it is in auto
1.2 Stop CC pump if running
Bunker fire : Prevention
Bunker fire
PREVENTION OF BUNKER FIRE
Ensure Feeder outlet gate closes on auto when Feeder stopped/tripped. Otherwise give
a close command for closing.
PREVENTION OF BUNKER FIRE
Ensure Feeder outlet gate closes on auto when Feeder stopped/tripped. Otherwise give
a close command for closing.
Monday, May 18, 2020
Subscribe to:
Posts (Atom)