TDBFP TURBINE ROLLING PROCEDURE:1. ENSURE THAT TDBFP IS CHARGED FROM FEED WATER SIDE & IS PUT ON BARRING.

2. CHARGE TURBINE GLAND STEAM & THEN CONNECT TURBINE EXHAUST TO VACUUM SIDE. (CHARGING WILL BE DONE THROUGH 1 INCH EXHAUST V/V BYPASS LINE TO AVOID ANY DROP IN VACCUM.)

3. ENSURE THAT TDBFP TURBINE ACV, MCV & ESV ARE IN CLOSE CONDITION.

4. ENSURE THAT TURBINE SPEED SET POINT LESS THAN BARRING SPEED.

5. ENSURE OPENING OF LIVE STEAM VENT VALVE BEFORE ESV & OPENING OF TURBINE CASING DRAINS.

6. OPEN EXTRACTION MANUAL VALVE, AUX STEAM VALVE.

7. RESET THE TDBFP TURBINE & ENSURE BUILDING UP OF TRIP OIL PRESSURE.

8. OPEN TDBFP TURBINE ESV.9. RAISE THE SPEED SET POINT TO 1500rpm FOR SOAKING & CLOSE LIVE STEAM VENT VALVE.10. ENSURE AUTO CLOSING OF TURNING GEAR VALVE & AUTO CUT OFF JOP.

11. MONITOR ALL TSI PARAMETERS DURING SPEED RAISING, ENSURE ALL PARAMETERS WITHIN PERMISSIBLE LIMITS.

12. AFTER TDBFP TURBINE CASING TEMPERATURE REACHES 150C, RAISE THE SPEED SET POINT FURTHER TO 3000rpm.

13. BFP DISCHARGE V/V OPENING PERMISSIVE WILL BE AVAILABLE ONY AFTER DIS PR REACHES 60 KSC.

13. AFTER REACHING 4000rpm, OPEN CRH VALVE.14. AFTER TURBINE CASING TEMPERATURE REACHES 240C, LOAD THE TDBFP.

15. ALL PROTECTION OF P/P AS WELL AS TURBINE MUST BE IN SERIVCE.

TDBFP TURBINE OVERSPEED TEST IN DECOUPLED CONDITION:

1. ENSURE THAT MAIN P/P AND BOOSTER P/P IS DECOUPLED FROM DRIVE TURBINE AND TURBINE IS ON BARRING SPEED (THROTTLE THE TURNING GEAR VALVE TO KEEP SPEED WITH IN LIMITS i. e. LESS THAN 540rpm)2. ENSURE AVAIABLITY OF STANDBY OIL P/P AND EOP AUTO STANDBY.2. CHARGE TURBINE GLAND STEAM & CONNECT THE EXHAUST TO VACUUM SIDE.

3. ENSURE CLOSING OF TURBINE ACV, MCV, ESV & ACV WARM UP VALVE.

4. OIL INJECTION TO BE CARRIED OUT AND HEALTHINESS OF OVERSPEED TRIP BOLTS TO BE ENSURED.5. OPEN AUXILIARY STEAM VALVE & ACV WARMUP VALVE.6. RAISE THE SPEED SET POINT TO 1500 rpm, ENSURE CLOSING OF TURNING GEAR VALVE & AUTO CUT OFF JOP.

7. MONITOR ALL TSI PARAMETERS, ENSURE ALL PARAMETERS ARE WITH IN LIMITS.

8. IF ANY SPEED HUNTING IS OBSERVED, TRIP THE TURBINE & GET THE ACV PILOT VALVE CLEANED.9. IF THERE IS NO HUNTING, FURTHER RAISE THE SPEED SET POINT AND OBSERVE FOR ANY SPEED HUNTING.10. REPEAT STEPS 9 &7, TILL TURBINE SPEED REACHES OVER SPEED TEST AROUND 6000rpm.

11. ENSURE THAT TUEBINE DESK AND MANUAL EMERGENCY TRIP MUST BE MANNED BY A PERSON.

12. IF TDBFP TURBINE DOES NOT TRIP EVEN AT 6100rpm, TRIP THE TDBFP TURBINE MANUALLY.13. ALL TURBINE PROTECTION MUST BE IN SERVICE.