Energy Tab

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

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.

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.

Vacuum Pulling Process 1 Ensure permit cancellation on Vacuum pump/Flash Tank related MOV/Condensate system & Clearance for vacuum pulling.

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.

Shutdown Instructions 1 Ensure UT change over before tripping of boiler/ turbine. 2 Ensure 400 KV breaker are opened after unit tripping.

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 .

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.

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

Bunker fire PREVENTION OF BUNKER FIRE  Ensure Feeder outlet gate closes on auto when Feeder stopped/tripped. Otherwise give a close command for closing.