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24V DC Fail EMERGENCY INSTRUCTIONS Identification of the Emergency 1. Boiler trips on loss of 24V DC Supply protection. Turbine trips on boiler trip protection followed by generator. 2. All controls operating on DDC becomes inoperative Response in Handling the Emergency Action Responsibility Remarks 1 Confirm tripping of turbine. In local governing rack the trip oil pressure should be ‘0’ otherwise trip turbine from emergency trip lever in governing rack. Trip TD BFPs from local governing rack UCE & TG Engineer 2 Confirm tripping of generator i.e. opening of GCB. If GCB has not opened, open 952 and 852 breakers from switchyard UCE  3 Confirm starting of AOP (local) on turbine trip, otherwise start EOP from local for both main and TDBFP turbines. UCE & TG Operator  4 Confirm running of ACSOP(local) if no seal oil pump is running immediately start DCSOP from local UCE & TG Operator  5 Confirm AC scanner fan is in service(local),else start DC ...

Emergency Handling by Opn Gr-II:Unit in CMC Unit Status before  Unit Load : 350 MW  Coal Flow : 260 TPH Mills I/S : BDEFG  Oil Guns I/S : Nil INCIDENT: 12:59:00 HP bypass valve BP-2 started opening & got opened up to 98% & at 12:59:31 BP-1 also started opening & opened up to 98%. ACTION TAKEN: Machine came in CMC- pressure control mode (earlier in CMC-load control mode) due to pressure deviation and load came down to 174MW. Machine taken in TF mode pressure control after reducing throttle pressure HP bypass OSU pump buttons in vertical panel acknowledged, OSU pump-2 took start, but still the valves stayed in open condition. AB elevation oil gun taken in service and feeder F unloaded to min followed by oil support at CD elevation for flame stability. MDBFP kept in service and TDBFP- A hand tripped to maintain drum level. Further as Drum Level was still increasing TDBFP-B also hand tripped due to which runback acted and tripped mill G. M...

CHECK LIST FOR AIR INGRESS IN CONDENSER Sl No Description Location Checked status 1.         Valve gland sealing water pressure (UCB). UCB 2.         Gland steam pressure & temp UCB 3.         Vacuum breaker Valve 17 mtr 4.         HPT / IPT / LPT glands 17 mtr 5.         TDBFP-A  gland 17 mtr 6.         TDBFP-B  gland 17 mtr 7.         LPT Diaphragm 17 mtr 8.         TDBFP-A  Diaphragm 17 mtr ...

CHECKLIST FOR ROLLING THROUGH ATRS (HOT start up) PRESENT CONDITION: M/C on barring MS temp :   > 480 Deg /Pressure : 90 ksc HRH temp : >460 Deg /pressure : 9 ksc Lube oil temperature : 55 deg CF temperature : > 50 deg PW/CG/CF temperature control valves in auto Speed controller active CHECK LIST Turbine in Reset condition ( Trip oil pressure  : > 8 ksc ) Starting device :  0% / Speeder gear : 99% HP & IP CVs showing : 0% Turbine throttle pressure set point 0 ksc MAL 11 & MAL 12 in open condition/ all MAL drains manual valve open /SLC drains ON Load contol On / Limit pressure mode selected MS 109 / MS 110 & HRH 105/106 valves open feedback Load refrence (PR) set point to be 70 MW/ PRmax 120 MW Trim device to be made off Check TSC margins &TSC influence on Plunger coil not off check X1 &X2 criteria for opening of STOP valves Temperature curves X3,X4& X5 for control valve opening and upto 36...