Exhibit 12.2

Exelon Generation Company, LLC

Ratio of Earnings to Fixed Charges

	2009			2010			2011			2012			2013			3 Months Ended March 31, 2014
Pre-tax income from continuing operations		3,555			3,150			2,827			1,058			1,675			(384	)
Plus: (Income) or loss from equity investees		3			—			1			91			(10	)		19
Less: Capitalized interest		(49	)		(38	)		(49	)		(67	)		(54	)		(15	)
Pre-tax income from continuing operations after adjustment for income or loss from equity investees and capitalized interest		3,509			3,112			2,779			1,082			1,611			(380	)
Fixed Charges:
Interest expensed and capitalized, amortization of debt discount and premium on all indebtedness		162			191			219			402			445			105
Interest component of rental expense (a)		212			222			220			291			248			70
Total fixed charges		374			413			439			693			693			175
Pre-tax income from continuing operations after adjustment for income or loss from equity investees and capitalized interest plus fixed charges		3,883			3,525			3,218			1,775			2,304			(205	)
Ratio of earnings to combined fixed charges		10.4			8.5			7.3			2.6			3.3			(1.2	)(b)

(a) Represents one-third of rental expense relating to operating leases, which is a reasonable approximation of the interest factor.

(b) Due to the loss for the 3 months ended March 31, 2014, the ratio coverage was less than 1:1. Generation would have needed to generate additional earnings of $380 million to achieve a ratio coverage of 1:1