Associated Press: As the nation’s oldest nuclear power plant shows its age, some call it Oyster Creak. The latest problems — a series of radioactive water leaks — were found just days after the Oyster Creek Nuclear Generating Station got a new 20-year license that environmentalists bitterly fought for four years. Those problems followed corrosion that left the reactor’s crucial safety liner rusted and thinned. The U.S. Nuclear Regulatory Agency and the plant’s owners, Chicago-based …