MT1
MT2
ASG
ZM
RC
100
When do the rupture diaphragms rupture and where does the steam go?
Rupture at 3-5 psig and release the steam to the atmosphere
100
Standby LH Pump Auto Starts (3)
a. LH pressure < 1300 PSIG b. 103% Turbine Overspeed c. Load Drop Anticipator circuit
100
What do slave relays do?
They actuate individual components (pump, valve, dampers...)
100
What type of valves are the Vacuum Breakers, and what do they do?
a. Motor operated valves connected to the Main Condenser shells b. Allows flow from the Turbine Building atmosphere into the Main Condensers to "break vacuum"
100
Purposes of the ZP Priming Valves
Allows air NOT water to escape waterboxes and endbells
200
When is the Exhaust Hood Spray trip active? What is the Exhaust Hood Spray Temperature trip? (Coincidence if you know it)
<60% Turbine Load 225F (1/3 Detectors)
200
What does the LH reservoir air dryer do? Where does it get its air?
  a. Provide a slight overpressure of very dry air to minimize moisture intrusion b. Gets its air from VI
200
What are the different failure mode of the relays?
Failure of relay to latch Failure of relay to reposition Contact resistance too high Component fails to a position
200
How is seal water initiated to the Vacuum Pumps?
Manually by throttling open the Main Vacuum Pump Seal Water Solenoid Valve Bypass for 10-15 seconds to allow seal water to seal the pump before Main Vacuum Pump start
200
Where does the ZP system take a suction?
Inlet and outlet water boxes of "A" condenser, the "B" outlet water box, and the hydrogen cooler endbells
300
What is the after seat drain, location in flowpath? What is it used for?
a. A leakoff downstream of the Stop Valve seat b. It is used to supply sealing steam for TL (Turbine Steam Seal System) and actually supplies turbine sealing steam when the turbine is operating
300
What does the Steam Seal Feed Valve (TL-3) do? Setpoints?
It will control Main or Auxiliary Steam flow to the Gland Seal System. TL-3 regulates with a setpoint of 3 to 6 psig to control gland seal header pressure, as pressure decreases TL-3 opens to supply more steam
300
What is "Go" Testing
Energizes slave relay and actuates protective device
300
How are the ZM Pumps connected?
a. To a common header shared between both Units. Pump "A" is on the Unit-1 side of the header and pump "B" is on the Unit-2 side of the header b. If pump "A" is being used to pull vacuum on Unit 2, it will not be possible to pull a vacuum on Unit 1 with pump "B" at the same time
300
At what different RC temps do the fans on the cooling towers shutdown
a. At RC cold water temperature of < 59°F, all the fans on 'A' tower shutdown b. At RC cold water temperature of < 57°F, all the fans on 'B' tower shutdown c. At RC cold water temperature of < 55°F, all the fans on 'C' tower shutdown
400
Purpose of the Journal and Thrust Bearings? How many of each are there?
Journal Bearings: 12 of them, they support the rotor Thrust Bearings: 1 of them, they maintain Axial Position
400
TGOP Auto Start EBOP Auto Start MSP Auto Start
TGOP: Bearing Oil Header Pressure <= 15 PSIG, OR MSOP Discharge Pressure <= 190 PSIG EBOP: Bearing Oil Header Pressure <= 10 PSIG, AND MSOP Discharge Pressure <= 180 PSIG MSP: MSOP Suction Pressure <10 PSIG
400
What is "Block" testing?
Energizes slave relay and checks continuity of control circuit instead of operating the final actuation device
400
Where do the Steam Jets take a suction and discharge too?
a. The 1st stage steam jets take suction on the Main and/or CFPT condensers and discharge to the inter condenser. b. The 2nd stage steam jets take suction on the inter condenser and discharge to the after condenser
400
What are the different Cooling Tower fan interlocks (4)
a. Fans cannot be started if the DC brake is not functioning or de-energized b. Will automatically trip the fan if a preset vibration is exceeded (must be reset in the block house) c. Each fan has a DC braking device and a mechanical anti-windmilling device to prevent windmilling anytime the motor is not running d. Low temperature auto tower shutdown
500
Main Steam Stop Valves can't be opened unless what condition met? Purpose of Main Steam Stop Valve #2 Bypass?
D/P <13% of rated steam pressure Allows for warming of the turbine and pressurizing the turbine shell to minimize the D/P across the Main Steam Stop Valves
500
Where does the steam come from for TL and TF Steam Seal Systems? (Startup and different power levels)
a. Startup: Supplied from Aux Steam b. 15% Power: MAY be transferred to Main Steam c. 50% power: 'E' Bleed and Packing Leakoff
500
Basic Flowpath for ESF Signal?
a. Monitored parameter exceeds setpoint b. Protection bistable actuates c. Bistable Output energizes to the Input Bay of the SSPS Cabinets d. Input Bay sends signal to Logic Bay e. Logic Bay sends signal to Master Relay in Output Bay f. Master Relay energizes associated Slave Relay to perform desired function
500
Flowpath of CM through the CSAE
CM enters the tubes in the after condenser and the lower tubes of the inter condenser and then exits through the upper tubes of the inter condenser
500
RC Pump Start Interlocks (4)
a. Only one pump can start if only one cooling tower inlet isolation valve is open b. Only two pumps can start if only two cooling tower inlet isolation valves are open c. Only two pumps can start if half of the main condenser is isolated (one train isolated) d. No pumps can start if the main condenser is isolated or all three cooling tower inlet isolation valves are closed
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