The plant is in Mode 6 with refueling operations in progress when Preferred AC Bus Y10 becomes de-energized due to a failure of its Inverter ED06. Which of the following evolutions must be suspended immediately?
A) Crane operations on 590’ elevation in Containment.
B) Refueling Handling Machine wet checks in the Reactor Cavity.
C) Spool piece installation for draining the South Tilt Pit.
D) Handling tool washdown over the Reactor Cavity.
C) Spool piece installation for draining the South Tilt Pit
(this multiple choice question has been scrambled)