Post Shutdown Instructions for UCE

POST SHUTDOWN IMMEDIATE UCB OPN 

1. Check & ensure GCB IS open.
2. Check & ensure Starting of AOP of main turbine after 2850 RPM.
3. Ensure HPT evacuation valve opens after turbine tripped provided condenser vacuum is better than -
0.4ksc and closes at 2000 rpm.
4. Put FRS low level controller in service and maintain drum level. In case of difficulty in maintaining drum
level or at low CC pump DPs, CC pumps may be tripped .
5. Maintain Furnace Pressure & Put Master in auto.
6. Check & ensure All ESVs, & IVs and HPCVs & IPCVs get closed.
7. Maintain Seal Steam Pressure for maintaining Vacuum. Close Leak-off bypass if open. Keep watch on seal
steam temperature.
8. Raise turbine oil temperature set point to 60 oC during turbine coasting down & maintain temp. If
needed, isolate MOT cooler.
9. Check & ensure CRH NRV and All Extraction V/Vs get closed.
10. Maintain Hot well & D/A levels.
11. Check & ensure Starting of JOP (510RPM) and Barring gear opening (210RPM). DC-JOP starts if JOP 1
discharge pr is < 110 ksc. Ch/over to AC JOP and ensure SLC is ON.
12. Charge MS PRDS from other unit & maintain seal steam I/L temp in 280 oC to 320 oC.
13. Check & ensure Closing of PAPH-A,B FG outlet control dampers.
14. Check & ensure HOTV,LOTV and All HONVs, LONVs get closed. Mill & feeders trip.
15. Instruct for closing HPBP/SH/RH Spray manual isolating valves, RECORD COMPLIANCE. ENSURE CRH
DRAIN POT DRAIN: CRHV-101 & DRAIN BEFORE CRH-NRV: MAL-65 manual valves are kept OPEN.
16. Reduce D/A Pressure by closing control v/v from PRDS gradually with Maintaining PRDS pressure.
17. Switch-off ESP fields.
18. Reduce OAC make-up flow at appropriate level.
19. Isolate fuel oil station from firing floor.