Table: power_plant_reactors
Columns: reactor_unit
type
average_output
rated_power
began_construction
finish_construction
commercial_operation
close_of_reactor

Question: When did the reactor that has a rated power of 945 MW and ended construction on May 10, 1978 close?
SQL: SELECT "close_of_reactor" FROM power_plant_reactors WHERE "rated_power" = '945 mw' AND "finish_construction" = 'may 10, 1978'

Question: What is the rated power for the reactor that ended construction on May 10, 1978?
SQL: SELECT "rated_power" FROM power_plant_reactors WHERE "finish_construction" = 'may 10, 1978'