AOP-208 (2) Main Turbine Malfunction

Symptoms and Entry Condtions

Seal Oil Pressure Low

EHC Low

Hot Hood alarm

Vibration alarm

Low LO or Hot

Bearing Hot alarm

Oil rupture with/without flame

Turbine Trip Actions
(Ensure turbine is tripped or Trip turbine)

LO Fire

Main Oil Pump discharge <106psig

#10 Bearing <10psig

EHC <1100psig

Gland Steam <1.6psig

Hood OR Bearings(journal) >225°F

Vibes: One High-2 (Trip setpoint) and Another Alarm

Thrust Bearing >204°F

Thrust Bearing Wear Exceeds ±30mils (either direction)

Turbine Vibration Limits

(For reference)

Critical Resonance:

820-1350rpm

Lube Oil Rupture

(Step 1)

Generator Seal Oil

(Step 2)

Bearing Oil Supply Pressure

Main Oil Pump Discharge Trip threshold

Bearing No. 10 Supply Trip threshold

(Step 3)

Bearing Oil Supply Temperature

(Step 10)

EHS Operation

Standby Pump Start

Turbine Trip

(Step 4)

Gland Steam Pressure

(Step 7)

LP Turbine Exhaust Hood

(Step 8)

Turbine Vibrations

(Step 9)

Bearing Temperature

(Step 11)

Thrust Bearing Temperature

Thrust Bearing Wear

(Step 13)

Conditions to Break Vacuum

(Step 14)

Attachment 2 Oil Systems Emergency Shutdown

Turbine Damage

Local Pumps Lockout

(Att. 1 Steps 1-3)

Attachment 2 Oil Systems Emergency Shutdown

Reactor

Vacuum

Hydrogen

(Steps 4-9)

Attachment 2 Oil Systems Emergency Shutdown

Remaining Steps

(Steps 10-14)

Not Pictured:

13. Secure Vapor Extractors