The facility was put in long-term safe storage (SAFSTOR) until decommissioning work was resumed by EnergySolutions in 2010.

The Nuclear Regulatory Commission approved the temporary transfer of Exelon's (ComEd's parent company) license to EnergySolutions of Salt Lake City.

[1][4] Contaminated materials of the dismantled facility were shipped to ZionSolutions' disposal site in Utah and to WCS in Texas for intensive separation.

"[6] On February 14, 2013, a small fire broke out at the shuttered Zion nuclear plant, but authorities said it was put out with one extinguisher and there were no radiation leaks or risks to the public.

[7] A January 7, 2017 Chicago Sun-Times article reported that the closing of the nuclear plant strongly and negatively affected the City of Zion economically.

[9] Eight days later, the NRC issued the confirming amendments that identify Constellation Energy Generation as the licensee.