NPR's Michele Kelemen reports while American officials are warning of potential Y2K computer problems in Russia and other former Soviet republics, Russian officials don't seem too worried. The Russians have spent only modest sums to reprogram computers to correctly read the date 2000. US officials fear the Russian energy sector could be hard hit. But the Russians seem confident they'll be able to cope with any computer malfunctions that occur at nuclear power plants. They dismiss talk of a Chernobyl-type disaster on New Year's day.