Energy Tab

1 Ensure the availability of both condenser de-watering pumps. 2 Decrease the load to 300 – 350 MW 3 Ensure that both CW interconnection valve are opened 4 Start Stand by Vacuum pump

TEST PROCEDURE: - 1) Air Filling valve is to be opened for flushing of line & removal of moisture in atmosphere. 2) Chemistry is to take sample for dew point measurement. After chemistry clearance , Filling process has to be continued. 3) Close the waste gas (vent) valves.

1 Water washing of air heaters should be carried out in hot condition after boiler shutdown.Flue gas inlet temperature should be between 200 deg C to 150 deg C 2 Both FD/ID/PA fans should be in stopped condition 3 All APH flue gas outlet damper should be closed

1 Reduce the load to 400 MW & then remove from CMC 2 Before Unloading FD Fan (to be stopped ),The following Permissive & Protection to be kept bypassed : “FD Fan ON & Discharge Gate close” permissive to be given “FD Fan ON & Discharge gate auto open” to be bypassed.

1 Reduce the load to 300 MW & then remove from CMC 2 Keep 4 consecutive Mills in service. If required , take oil guns in service

Reduce Load to 300MW Start Unloading corresponding FD fan & increase loading of other FD Fan through blade pitch.

Reduce Load to 300MW Slowly close flue gas outlet damper for PAPH which has to be stopped

Reduce Load to 300MW Slowly close flue gas outlet damper (2 in no. )for APH which has to be stopped Adjust other PAPH/SAPH flue gas outlet damper Close flue gas inlet damper Close SCAPH inlet , outlet & bypass damper. During Closing , Observe Air Flow. Close SAPH air outlet damper (2 in no.) Stop the SAPH motor once flue gas inlet temperature reduced below 150deg C Close Air motor main isolating valve & bypass isolating valve

BEFORE LIGHT UP ACTIVITIES BOILER SIDE MAN ,MATERIAL REMOVED AND BOILER IS READY FOR LIGHT UP.

Recommended Parameter Values 1. Boiler Water – pH = 9.1-9.4 2. Boiler Water – Specific Conductivity < 20.0 μs/cm 3. Boiler Water – Silica < 100 ppb 4. Boiler Water - Phosphate = 1-2 ppm 5. Boiler Water - Chloride < 0.5 ppm