In New Jersey, the Exelon Corporation’s Oyster Creek nuclear power plant was placed on alert after rising waters threatened the cooling of uranium fuel rods. The alert-level designation is the second-lowest of four action levels for safety. Another New Jersey plant, the Salem 1, was shut down after its water pumps failed. The plant’s operator, PSEG Nuclear, says it is stable. The storm is continuing to barrel through Pennsylvania today, bringing a mix of rain, wind and snow that is expected to last for several days.