ONE of the few bright spots in the recently-concluded stormy European Community (EC) summit in Corfu in Greece was the unanimous decision on the need to shut down, permanently and as quickly as possible, reactors at the Chernobyl nuclear plant in the Ukraine. EC leaders decided to put their might behind a $600 million effort to close the plant, the site of one of the world's worst nuclear accidents in 1986. The leaders decided to work out a comprehensive funding scheme at a forthcoming G-7 summit in Naples.