PJM Interconnection, which manages the electrical grid for Ohio and 12 other states, has found that FirstEnergy Solutions’ plan to permanently deactivate its three nuclear power stations will not hurt the power supply for its customer base.

A PJM committee review of the plan that the FirstEnergy Corp. subsidiary spelled out last week for federal regulators concludes “sufficient transmission margin remains” to ensure there is enough supply to operate the system with two single outages under peak operating conditions.

FES plans to close its  Davis-Besse Nuclear Power Station by May 31, 2020; its Beaver Valley (Pa.) Power Station Unit No. 1 by May 31, 2021; its Perry Nuclear Power Plant by May 31, 2021 and its Beaver Valley Power Station Unit No. 2 by October 31, 2021.

The review is a key step for FirstEnergy as it seeks to shed its power-generation program and narrow the Akron-based company’s focus to regulated energy transmission. FES filed for Chapter 11 bankruptcy protection March 31.