Main Steam & MSR Review Topic (RQ-C-4661)

Question 1

A nuclear power plant is operating at 95% power when the extraction steam to a high pressure feedwater heater is isolated. After the transient, the operator returns reactor power to 95% and stabilizes the plant.

Compared to the conditions just prior to the transient, the current main generator output (MW) is:

a) higher because thermal efficiency lowered
b) higher because the main generator rejected load
c) lower because thermal efficiency lowered
d) lower because the main generator rejected load

Answer 1

c) lower because thermal efficiency lowered

Question 2

Overall secondary plant efficiency will decrease if:

a) additional moisture is removed from the steam entering the turbine
b) the temperature of the feedwater entering the steam generator is increased
c) the amount of condensate depression (subcooling) in the main condenser is decreased
d) the temperature of the steam at the turbine exhaust is increase

Answer 2

d) the temperature of the steam at the turbine exhaust is increase

Question 3

Pressure in one steam generator is currently 1077#. Which one of the following describes the maximum number of Main Steam Safety Valves which should be lifting on one steam generator

a) 2
b) 3
c) 4
d) 5

Answer 3

c) 4

Question 4

Which one of the following signals will NOT cause a SLI signal

a) Containment pressure Hi-Hi
b) High steam flow with Lo-Lo Tave
c) Low steam line pressure
d) Containment isolation phase B

Answer 4

d) Containment isolation phase B

Question 5

Following a SLI signal which ONE of the following is the action that should be taken to close the SGSV dump valves

a) Select BLOCK on steam line isolation Block/Reset switches
b) Select RESET on steam line isolation Block/Reset switched
c) Place SGSV dump valve control switches in LOCKOUT
d) Place SGSV dump valve control switches to to TRIP/RESET

Answer 5

c) Place SGSV dump valve control switches in LOCKOUT

Question 6

When removing a SGSV dump valve or selector valve from service, the breaker for the selector valve is required to be opened to prevent the:

a) selector valve from repositioning
b) hydraulic exerciser from operating
c) Operation of SG PORV
d) Dump valve from opening

Answer 6

a) selector valve from repositioning

Question 7

The U1 MSRs are fully in service at 100% power. In their normal alignment, the MSR drain tanks will drain to the #___ FW heaters and the Reheater Coil drain tanks will drain to the #___ FW heaters

a) 4, 6
b) 5, 6
c) 6, 4
d) 6, 5

Answer 7

b) 5, 6

Question 8

The U2 MSRs are fully in service at 100% power. In their normal alignment, the MSR drain tanks will drain to the #___ FW heaters and the Reheater Coil drain tanks will drain to the #___ FW heaters

a) 4, 6
b) 5, 6
c) 6, 4
d) 6, 5

Answer 8

a) 4, 6