Permanent shutdown notices for the reactors will be filed with the Nuclear Regulatory Commission within 30 days, and their fuel purchases will be cancelled. Exelon will record a one-time charge of up to $200m against 2016 earnings, as well as accelerated depreciation and amortisation of about $2bn until the announced shutdown dates. Exelon employs nearly 700 workers at Clinton and 800 at Quad Cities. Employees will operate the reactors until the retirement dates, with staff transitions expected within six months after that, the statement said.