PLYMOUTH, Mass. -- The Nuclear Regulatory Commission says a power plant in Massachusetts has lost power and shut down during a massive snowstorm.The NRC says the Pilgrim Nuclear Power Plant in Plymouth experienced an automatic shutdown at around 9:15 p.m. Friday after losing off-site power. Spokesman Neil Sheehan says the plant has declared an unusual event, which is the lowest level of emergency classification.Read More... More on Winter Storm 'Nemo'