Jonathan Wiggs/Globe Staff
The Pilgrim nuclear plant in Plymouth. The reactor is in the tall building at right.
By Nestor Ramos and David Abel Globe Staff October 13, 2015
Shutting off the power at a nuclear plant takes only a few minutes. But decommissioning one — safely removing and storing dangerous radioactive material and closing down the plant for good — can take decades.
In announcing Tuesday that it planned to close the Pilgrim Nuclear Power Station, owner Entergy Corp. revealed few details about how it plans to decommission its aging plant in Plymouth, rated among the least safe in the country. But recent history at nuclear plants in New England and beyond suggests that the process could be long, contentious and cost hundreds of millions of dollars.