Complex sentence: Due of lack of funds and aging equipment it was finally shut down permanently on November 27,1972, and was officially decommissioned December 31,1975 under the definition of the Atomic Energy Commission.
Split into simpler sentences: Due of lack of funds and aging equipment it was finally decided to shut down permanently on November 27,1972. It was officially decommissioned December 31,1975 under the definition of the Atomic Energy Commission.