Complex sentence: The BN-350 was a sodium-cooled fast reactor nuclear power plant located at Aktau (formerly known as Shevchenko from 1964-1992), Kazakhstan, situated on the shore of the Caspian Sea.
Split into simpler sentences: The BN-350 was a sodium-cooled fast reactor located at Aktau Nuclear Power Plant. The power plant was located in Aktau (formerly known as Shevchenko in 1964-1992), Kazakhstan, on the shore of the Caspian Sea.