The United States Supreme Court has declined to hear a dispute over where to store highly radioactive waste from the nation's nuclear power plants. Spent nuclear fuel is building up at power plants across the nation, including Nothern State's Power's Prairie Island nuclear plant. Minnesota Public Radio's Mary Losure reports. Utilities including NSP had hoped the case would force the Federal Department of Energy to meet a 1998 deadline to accept the spent nuclear fuel. The Supreme Court's decision lets stand a lower court ruling that said the DOE does not have to take the waste until the agency has a place to put it. The DOE's permanent storage site at Yucca Mountain, Nevada won't be ready un