| 1 | MDBFP – Available & Standby |
| 2 | Oil gun: HFO Pr/Temp=16 ksc/>110 Deg , Atom Steam: 6.5ksc/>220 Deg (Open steam drains @AB elevation) |
| 3 | Turbine on LP mode, Boiler Master in Manual(Manual Mode) |
| 4 | Isolate PRDS from CRH for this unit, Increase the set point to other units @ 13.5 ksc/ Temperature >280 deg |
| 5 | Open GS supply line drain to atmosphere |
| 6 | Charge APH soot blowing line from PRDS |
| 7 | Load-500 MW with 6 Mills(Roughly @ 55 tph each) |
| 8 | Cut feeding in top mill & Stop mill, other 5 mills >=40 tph/ load ~325 MW,In b/w reduce ThrotPr- 170 to 150 ksc |
| 9 | Take AB & CD elevation gun/ Start APH Soot blowing |
| 10 | Start MDBFP in Manual(cold) & Load/ unload anyone TDBFP(<=3500 rpm), MDBFP-auto & FW master-Auto |
| 11 | Switch off ESP fields as guns been taken & proved |
| 12 | Cut feeding in Bottom Mill & stop it/ Now 4 mills/ Ms Pr ~130 ksc/ load <=300 MW (Reduce feed in top mill too) |
| 13 |
| 14 | Load~225 MW with 3 Mills+ 2 elev oil guns/ Unload TDBFP, keep load on MDBFP(Off CRH block v/v of TDBFP) |
| 15 | Trip the other TDBFP/ Reduce feed in bottom mill/Load~175 MW/ Unload one PA fan/ Reduce MsPr~90-100 ksc |
| 16 | Changeover UT to ST / Trip 2nd TDBFP |
| 17 | Trip bottom mill/ Load 140 MW/ 2 Mills +AB1324 CD13 or CD24 guns / only MDBFP in service |
| 18 | Bring load ~80 MW by cutting upper mill & opening HPBP further |
| 19 | Maintain drum at least +50mm to +100mm before hand tripping turbine(to avoid boiler trip on drum level Lo-Lo) |
| 20 | Hand Trip Turbine/ Turbine tripped (1 mill +6 guns i/s + MDBFP i/s) |
| 21 | Maintain TG lube oil temp>50 deg/MAL drain open/AOP starts @2850rpm/close all S/ RH spray v/vs |
| 22 | Stop mill, Stop guns/ boiler will Trip on Loss of all fuel/ All PA, HOTV/LOTV |
| 23 | Depressurise boiler to 45-50 ksc before closing boiler stop valve thru HP/LP bypass |
| 24 | Close Boiler stop valve/ De pressurise MS/HRH line thru HP/Lp BP/ after that close HPLP bypass/ Close manual of HPBP spray v/v |
| 25 | Purge boiler for 10 min(2 cycles) |
| 26 | Stop one set of ID and Fd fans after purging |
| 27 | cool boiler furnace Pr(= -10 to -20 mm)/ Monitor rate of ccoling by following BCW suction manifold temp<87 deg/hr |
| 28 | Drum level to be maintained as such till drum metal temp reaches 100 deg |
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