8/18/2019 Passivation Stage II

1/1

BOILER ADJUSTMENTS DIVISION / STAGE—II / TS—II.PASSIVATION PROCEDURE FOR UNIT-VI.

1. Bunkers filling not to be carried out from II shift first filling onwards on 02.10.2000.

2. All the bunkers to be emptied for liner plate replacement work.

3. If necessary, oil support may be taken while emptying the bunkers.

. !nit load has to be reduced to minimum 0 "#, using $%& '% bypass.

(. )e synchroni*e the unit after informing switchyard.

+. onduct turbine o-er speed test. top the firing in boiler.

/. tart force cooling of the boiler. eep one series fans one B % and one # pump. Inform generator board

to switch off all % fields.

4. %5) system to be isolated. All in6ection -al-es of $ & 5$ system to be kept closed.

7. hemical staff shall be informed for do*ing and analysis after tripping the turbine.

10. 'ight up the boiler at drum pressure 0 sc. tart do*ing hydra*ine in drum 8 feed pump suction at drum

pressure 30 sc. Ad6ust the firing with two oil burners to about to ( 9&hr :10 sc oil pressure at burner

header; and maintain 30 sc drum pressure by tuning $% & '% bypass.

11. %assi-ation commences once 200 %%" of