LIGHT UP CHECK POINTS

BEFORE LIGHT UP ACTIVITIES

BOILER SIDE

• MAN ,MATERIAL REMOVED AND BOILER IS READY FOR LIGHT UP.
  
• DRUM LVLPROTECTION TO BE BYPASSED.
• SEAL TROUGH CHARGED AND BOTTOM ASH HOPPER FILLED.
• ESP FIELDS OFF.
• MAINTAIN WINDBOX TO FURNACE DP PR ABOVE 35MMWC AND PUT SADC IN AUTO.
• HFO TEMP INCREASED TO >100 DEGREE BY INCREASING HFO HEATER SET POINT .
• SCAVENGING OF AB ,CD,EF OIL GUNS TO BE DONE IN ADVANCE BEFORE RESETTING MFT.
• BOILER DRUM, SHVENTS AND SH DRAINS AREOPEN. ALSO BOILER OTHER DRAINS MUST BE IN CLOSE CONDITION.
• APH BLOWERS LINED UP AND OPERATION CHECKED.
• ECO R/C VALVE IS OPEN.
• BOTH BCW ARE RUNNING AND THIRD ONE IS IN AUTO S/B.
• CBD MANUAL AND MOTORISED VALVES ARE OPENED.
• ENSURE LP DOSING P/P AND BOTH CPU I/S.
• PAPH –A AND B FG O/L CONTROL DAMPER CLOSED.
• ALL MILLS LOP FLOW TO BE ENSURED AND HEATERS TO BE I/S AS PER REQUIREMENT

TURBINE SIDE

• HW/DEAERATOR LVL NORMAL(HW: -150MM, D/A: 450MM)
• SH/RH/HP BYP SPRAY MANUAL V/V SHOULD BE CLOSED.
• MAL DRAINS MANUAL AND ELECTRICAL(11,12,26,22,31,32,27,47,51,52,54,81,55,65)OPENED
• MS STRAINER DRAIN (MSV-101&102) AND HRH STRAINER DRAIN (HRHV105 &106)OPENED

AFTER LIGHT UP

BOILER SIDE

• FEED WATER FLOW TO BOILER IS CONTROLLED BY LOW RANGE FRS IN AUTO AND TDBFP DISCHARGE PR>10 KSC FROM DRUM PR.MONITOR EXHAUST HOOD TEMP BELOW 100 DEGREEC AND CHARGE HOOD SPRAY IF REQUIRED.
• DRUM AND SH VENTS CLOSED AT DRUM PR 2 KSC.
• START UP VENT CLOSED(AFTER HPBP AND LPBP CHARGING) AND SH DRAINS CLOSED AFTER 15 KSC DRUM PR.

TURBINE SIDE

• MAIN TURBINE SEAL STM TEMP INCREASE >240 DEGREE, ATMOSPHERIC DRAIN AT 17M OPENED AND TDBFPS GLAND STM CHARGED AND OPEN EXHAUST V/V.
• VACCUM BREAKER CLOSED AND VACUUM P/P TO BE TAKEN I/S.SEAL STEAM CHARGED AT > -0.20KSC.
• BSV OPENED AND HPBP AND LPBP WARM LINE CHARGED>5KSC DRUM PR.
• LPBP/HPBP CHARGED AT DRUM PR OF >8 KSC.

BEFORE ROLLING

BOILER SIDE

• OPEN ANY MILL CAG AND CAD AND PA FAN TAKEN I/S AND OPEN PAPH FG O/L DAMPER.ENSURE ONE SEAL AIR FAN IS RUNNING.
• ONE MILL (A OR C) IS TO BE TAKEN I/S AS PER(TSE) HP TURBINE CASING TEMP.

TURBINE SIDE

• ENSURE TURBINE IS IN EHTC MODE FROM LOCAL.
• HP/IP TOP/BTM DT TO BE MONITORED.
• DECREASE LUBE OIL TEMP SET POINT FROM 50 TO 45 degC .
• PR SET POINT IN INVENSYS SCREEN TO BE KEPT 50 KSC.

BEFORE SYNCHRONISATION

• Pr max LOADAND LOAD REF VALUE SHOULD BE REDUCED TO 50 MW.
• HPBP SRAY NORMALISATION AFTER HPBP DOWNSTREAM TEMP >330 DEGREE.
• GT ISOLATORS TO BE LINED UP FROM SWYD.
• BEFORE SYNCHRONISATION ONE MILL IS I/S AND ONE MILL HOT AIR CHARGED FOR WARM UP.

AFTER SYNCHRONISATION

• SH AND RH SPRAY MANUAL V/V OF TDBFP AND MDBFP OPENED
• PW/GAS CNTRL TO BE PUT IN AUTO.
• LPH/DEAERATOR/HPH TO BE CHARGED.
• MAL DRAINS CLOSING.
• ST/UT CHANGEOVER AFTER 100 MW.
• FRS HIGH RANGE TAKEN I/S AT >200 MW BY KEEPING DRUM LEVEL LOW(-150MM).
• OIL GUN WITHDRAWAL AND ESP FIELD CHARGING AFTER FIVE MILLS I/S AND LOAD >300MW.
• BOILER SILICA TO BE MONITORED BEFORE FURTHER LOAD INCREASE.