ED (Extraction Drains) Flashcards
Which of the following conditions is indicated by an abnormally high Drain Cooler Approach Temperature in a feedwater heater?
A. The normal level control valve is failed closed.
B. Water level within the heater is too low, allowing higher fluid velocities to cause tube fretting and vibration induced fatigue
C. The water level is too high, reducing the available heat transfer area
D. Single phase fluid flow in the heater drain piping
B. Water level within the heater is too low, allowing higher fluid velocities to cause tube fretting and vibration induced fatigue
Which of the following statements describe why the #4 Low Pressure Feedwater Heaters have 2 Bleeder Trip Valves each?
A. Backup for the motor operated extraction steam block valve
B. Non-Critical Air Relay Dump Valve (ARDV-2) is used to depressurization the heater #4 Bleeder Trip Valves.
C. HI HI level in the #4 Low Pressure Feedwater heater will cause a main turbine trip.
D. There is enough thermal energy within this heater alone to cause an overspeed condition of the main turbine
D. There is enough thermal energy within this heater alone to cause an overspeed condition of the main turbine
Which feedwater heater(s) do NOT have a normal level control valve?
A. 5A and 5B
B. 1A, 1B, 1C
C. 5A Only
D. Train ‘C’ Low Pressure Heaters
A. 5A and 5B
Unit 2 is mode 1 at 100% power.
Which of the following will NOT result in a ‘B’ Heater Drain Pump Trip?
A. Discharge flow 600 gpm for 20 seconds
B. ‘B’ Heater Drain Tank Level 3.5 ft
C. Startup Transformer MAN-X01 fault and turbine trip.
D. Heater Drain Tank level 10 ft
D. Heater Drain Tank level 10 ft
Which of the following will cause the Heater Drain Pump Miniflow Valve to OPEN?
A. Heater Drain Pump Started 10 seconds ago
B. Flow drops to 3100 gpm
C. Heater Drain Tank LO LO Level
D. Turbine Trip
A. Heater Drain Pump Started 10 seconds ago
Which of the following will occur automatically on a ‘B’ HDT HI HI level?
A. HP Heater 5B High Level Dump Valve OPENS
B. HP Heater 6B Normal Level Control Valve CLOSES
C. 5B Extraction Steam Drain Valve Closes
D. Heater Drain Pump Trip
B. HP Heater 6B Normal Level Control Valve CLOSES
What is controlling level in the Reheater Drain Tanks when MTN-HS-519 Steam Blanketing Mode Selector Switch is in STM BLKT?
A. Normal level control valve ONLY
B. High level dump valve ONLY
C. No level control all vents and drains are failed closed
D. Both level control valves modulate to control level
D. Both level control valves modulate to control level
Which of the following is an accurate Extraction Drain System Valve response to a turbine trip?
A. Extraction Steam Supply Motor Operated Valves CLOSE, Reheater Drain Tanks vent to the condenser.
B. BTVs depressurize, Reheater Drain Tank High Level Dump Valves OPEN
C. Extraction Steam Line Drain Valves OPEN, HP Heater High Level Dump Valves OPEN
D. Vents to the Extraction Line from 2nd Stage Reheater Drain Tank CLOSE, BTVs depressurize
B. BTVs depressurize, Reheater Drain Tank High Level Dump Valves OPEN
(Note: Valves Close- Reheater Drain Tank 1stg <10%, 2nd stg <20%, and MSR Drain Tank <10% fails open)
Unit 1 is operating at 100% power.
Alarm window 6B13A, EXTRACTION DRN SYS TRBL is alarming.
Alarm point EDLS709, Heater 7A Level Hi is in alarm.
An AO has verified that both the normal and high level dump valves for the High Pressure feedwater heater 7A indicate open.
Which of the following is correct for these circumstances?
A. If level continues to rise and the HI HI set point is reached, feedwater flow through the A train high pressure heater string will isolate, take actions per 40AL-9RK6B
B. Removing the 7A heater from service causes a reduction in feedwater temperature to both SGs and a power reduction is required per 40OP-9ZZ05 (Power Operations)
C. Prior to removing the 7A feedwater heater from service the crew must reduce power to either 50%, or until the High Level Control valve is less than 25% open per 40OP-9ED01, Feedwater Heater Extraction Steam and Drain System.
D. 40OP-9ZZ14 (Feedwater and Condensate) allows 100% operation with a high pressure feedwater string removed from service if FWN-HV-103, train A/B heater bypass valve is open since there would be a significant change in feedwater temperatures.
B. Removing the 7A heater from service causes a reduction in feedwater temperature to both SGs and a power reduction is required per 40OP-9ZZ05 (Power Operations)
