CREATE TABLE "reactor_units" (
  "reactor_unit" text,
  "type" text,
  "average_output" text,
  "rated_power" text,
  "began_construction" text,
  "finish_construction" text,
  "commercial_operation" text,
  "close_of_reactor" text
);

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 "reactor_units" 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 "reactor_units" WHERE "finish_construction"='may 10, 1978';