MT (Main Turbine)

Question 1

Which of the following statements is true concerning the Turbine Setback Signal sent to the EHC system on a Reactor Power Cutback Actuation?

A. The Turbine Setback Signal is generated by a circuit that looks at steam header pressure and Tave.
B. The load limit potentiometer must be run down until the “LOAD LIMIT” light illuminates to reset the Turbine setback.
C. The Turbine Setback Signal drives the load set motor back at 480%/min until the reactor power cutback actuation signal clears.
D. The Turbine Setback seal-in contact in the EHC system is automatically cleared 10 seconds after the Reactor Power Cutback System is reset.

Answer 1

Answer: B

Question 2

The unit is at rated power. All equipment is aligned normally/ in automatic. No evolutions are in progress. Then: Condenser back pressure degrades rapidly from: (A) 2.2, to (A) 8.0, (B) 2.3, (B) 8.0, (C) 2.5, (C) 8.3inches HGA. With no operator action, what would the unit status be at this point in the event?

A. Main Turbine Tripped, MFWPs Running, SBCS Condenser Interlock in.
B. Main Turbine Tripped, MFWPs Tripped, SBCS Normal/Auto.
C. Main Turbine On Line, MFWPs Running, SBCS Normal/Auto.
D. Main Turbine On Line, MFWPs Tripped, SBCS Condenser Interlock in.

Answer 2

Answer: A

Question 3

A down-power is in progress in accordance with 40AO-9ZZ07 due to an air inleakage problem on the Main Condenser. The Main Generator is presently operating at 400 Mwe. Backpressure is noted to increase to 5.2” HgA on the ‘C’ shell. Based on these conditions, the operating crew:

A. must reduce backpressure to less than 4” HgA within one hour.
B. can continue operating indefinitely.
C. must immediately trip the Reactor and perform SPTA’s.
D. must immediately trip the Main Turbine and take actions iaw 40AO-9ZZ08.

Answer 3

Answer: C