 Summing all together, it appears that almost all Exelon power plants, except Clinton, would break-even at $35/MW·h.In December 2016, Illinois voted to subsidize Exelon with 1c/kWh or $235 million per year (depending on electricity rates) to keep QC and Clinton open for at least 10 years, as natural gas had decreased rates.The Nuclear Regulatory Commission's estimate of the risk each year of an earthquake intense enough to cause core damage to the reactor at Quad Cities was 1 in 37,037, according to an NRC study published in August 2010.