Thursday August 6 1998 11:55 AM EDT Chernobyl Reactor Restarted KIEV, Ukraine (AP) - The only working reactor at the Chernobyl nuclear power plant has been restarted after four days of repairs, officials said Thursday. Reactor No. 3 shut down automatically Sunday because of an electric transformer malfunction and was restarted Wednesday afternoon, the state nuclear energy company Energoatom said. The Chernobyl plant originally had four working nuclear reactors. Reactor No. 4 was destroyed in a 1986 explosion, the world's worst nuclear accident. Another reactor was shut down after being badly damaged by a 1991 fire, and a third is not operational. Ukraine relies on nuclear plants to produce about a half of its electricity and says it does not have enough money to convert to other forms of energy. ---