New York Times: South Korea generates 40% of its electricity from nuclear power. Only three countriesâmdash;France, Japan, and the USâmdash;run more nuclear power stations. Now, as it exhausts its options for storing highly radioactive waste, South Korea plans to reprocess the waste into plutonium to fuel its next generation of fast-breeder reactors. But, as Choe Sang-Hun of the New York Times reports, carrying out that plan would contravene a 1974 treaty with the US, which is worried about the proliferation of material for nuclear weapons.