user: ### NOW ANSWER:
Question: When did the reactor that has a rated power of 945 MW and ended construction on May 10, 1978 close?
Columns: ['Reactor Unit', 'Type', 'Average Output', 'Rated Power', 'Began construction', 'Finish construction', 'Commercial operation', 'Close of reactor']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Bugey 1', 'Gas-cooled reactor', '540 MW', '555 MW', 'December 1, 1965', 'April 15, 1972', 'July 1, 1972', 'May 27, 1994']
SQL:

assistant: SELECT "Close of reactor" FROM "Table" WHERE "Rated Power" = '945 MW' AND "Finish construction" = 'May 10, 1978';