FWH

Question 1

Which of the following could occur as a result of not utilizing all the feed water heater continuous vents?

Answer 1

loss of performance due to air blanketing

Question 2

Which of the following will cause the “A” heater drains pump to trip?

Answer 2

Hi-Hi level in the A string 5th point feed water heater

Question 3

The “B” 4th point heater drain pump trips. Main condensate pump flow ____ and reactor power ____.

Answer 3

increase , increases

Question 4

Plant at 95%. The BOP discovers that the low pressure feed water heater bypass valve is partially open. How and why will closing the valve affect plant cycle efficiency?

Answer 4

increase due to the drop in temperature difference between the primary and secondary systems

Question 5

With the plant at 100%, power a hi level condition develops in “A” 3rd point feed water heater. Which valve closes in an attempt to restore FW heater 3A level?

Answer 5

FWH2A normal level control valve

Question 6

Which of the following conditions would require isolating a feed water heater string?

Answer 6

inability to control any feed water heater level in that string

Question 7

The required sequence for starting a 4th point heater drain pump is:

Answer 7

OPEN suction valve, OPEN suction and discharge constant vents, START pump, bypass and then OPEN discharge valve

Question 8

Plant is at 90% power. What is the highest concern while restoring the heater with the plant at this power level?

Answer 8

water hammer in the heater and its drain piping

Question 9

The plant is at power and a feed water heater low level condition exists. What is the major concern if this operating condition is not corrected?

Answer 9

flashing at the sub cooling zone inlet, which may result in erosion failure of the heater tubing

Question 10

Approximately what percentage of total feed flow is each heater drain pump contributing?

Answer 10

9%

Question 11

The purpose of the sub cooling (drain cooler) zone in a feed water heater is:

Answer 11

sub cools heater drains to prevent flashing across the normal level control valve

Question 12

Plant is at 80% power. The “A” 4th point heater drain pump trips and needs maintenance. What is the required isolation sequence and why?

Answer 12

CLOSE the pump discharge valve first and then CLOSE the pump suction valve to avoid over pressurizing the pump suction piping expansion joint

Question 13

Level in the 3A feed water heater rises to the HI level set point and the system responds. What action(s) will occur?

Answer 13

heater 2A normal level control valve trips CLOSED, heater 3A emergency level control valve modulates OPEN to control level in the 3A heater

Question 14

What is the heating steam supply for the 2nd point feed water heaters?

Answer 14

HP turbine exhaust extraction steam

Question 15

Which of the following will trip the “B” 4th point heater drain pump?

Answer 15

Hi-Hi level in the “B” 5th point heater

Question 16

Why has level in feed water heater 1B increased?

Answer 16

tube leak in FW heater 1B

Question 17

What describes the conditions necessary to automatically open the low pressure feed water heater bypass valve?

Answer 17

hi-hi level in any 5th or 6th point FW heater

Question 18

For the feed water heater event in progress, which of the following components could potentially be damaged?

Answer 18

HP turbine

Question 19

Which of the following feed water heater components is designed to prevent steam from the FW heaters causing turbine overspeed following a trip?

Answer 19

non-return check valves

Question 20

Which of the following supplies the heater steam to the 3rd point feed water heater?

Answer 20

LP turbine 8th stage extraction steam

Question 21

1st point feed water heater level starts rising unexpectedly. Normal and emergency level control valves fully open

What sequence of actions is the crew required to take to isolate this feed water heater?

Answer 21

reduce power to 88%
open 1st point heater bypass valve
close all steam and drain inputs
close the heater feed water inlet and outlet valves

Question 22

Crew is responding to problem with the 4B FW heater. Why does the procedure instruct the crew to notify plant engineering that the LP FW heater bypass line has been placed into service?

Answer 22

the bypass line is a line included in the MP3 erosion/corrosion program low usage lines program

Question 23

“A” string of the LP FWH isolate due to a hi-hi level in its 5th point heater. LP FWH bypass valve failed to open automatically.

Which of the following could occur if the low pressure heater bypass valve is not promptly opened?

Answer 23

an automatic trip of the running main feed pumps

Question 24

4C FW heater level rises. How will the heater level control system respond to this condition?

Answer 24

4C heater extraction steam isolates, the 4C heater extraction steam upstream drains OPEN, the 4C heater S/G blowdown steam isolates

Question 25

Level in the 3A FW heater rises to the Hi level set point. What actions occur?

Answer 25

heater 2A normal level control valve trips CLOSED, heater 3A emergency level control valve goes OPEN

Question 26

What is the heating source for the 5th point FW heater?

Answer 26

exhaust steam from the LP turbine

Question 27

Plant is at 95%. BOP inadvertently partially opens the low pressure FW heater bypass valve. How will this affect plant cycle efficiency?

Answer 27

decrease since more energy from the Rx is required due to feed water entering the SG at lower temperatures

Question 28

"A" and "C" CCS pumps are running. "B" stator liquid cooling pump is running. A bus 34A bus diff alarm is received. What action are the operators required to take?

Answer 28

go to E-0 or SI, main feed water pumps will trip on low suction pressure

Question 29

Rx trips due to turbine trip. Which of these annunciators is NOT expected at this point in ES-0.1?

Answer 29

The MOIS SEP LEVEL HI

Question 30

Crew is required to bypass and isolate one FW heater string due to FW heater tube leak. How does this affect the plant?

Answer 30

decrease thermodynamic efficiency