Exelon 2015 Annual Report Download - page 131

Table of Contents
Assets and Liabilities and Note 13—Derivative Financial Instruments of the Combined Notes to the Consolidated Financial Statements for
information on gains and losses associated with mark-to-market derivatives.
. Mark-to-market gains on economic hedging activities were
$257 million in 2015 compared to losses of $591 million in 2014.
. Mark-to-market losses on economic hedging activities were
$591 million in 2014 compared to gains of $504 million in 2013.
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 The $246 million increase in other revenue net of purchased
power and fuel was primarily due to the amortization of energy contracts recorded at fair value associated with prior acquisitions, the inclusion of
Integrys’ gas results in 2015, and an increase in distributed generation and energy efficiency activity. See Note 11—Intangible Assets of the
Combined Notes to Consolidated Financial Statements for information regarding energy contract intangibles.
 The $246 million increase in other revenue net of purchased
power and fuel was primarily due to the amortization of energy contracts recorded at fair value associated with prior acquisitions, partially offset by
a loss on gas inventory from lower of cost or market adjustments in 2014. See Note 11—Intangible Assets of the Combined Notes to Consolidated
Financial Statements for information regarding energy contract intangibles.
Nuclear Fleet Capacity Factor
The following table presents nuclear fleet operating data for 2015, as compared to 2014 and 2013, for the Generation-operated plants. The
nuclear fleet capacity factor presented in the table is defined as the ratio of the actual output of a plant over a period of time to its output if the
plant had operated at full average annual mean capacity for that time period. Generation considers capacity factor useful measure to analyze the
nuclear fleet performance between periods. Generation has included the analysis below as a complement to the financial information provided in
accordance with GAAP. However, these measures are not a presentation defined under GAAP and may not be comparable to other companies’
presentations or be more useful than the GAAP information provided elsewhere in this report.
2015 2014 2013
Nuclear fleet capacity factor 93.7% 94.3% 94.1%
(a) Excludes Salem, which is operated by PSEG Nuclear, LLC. Reflects ownership percentage of stations operated by Exelon. As of April 1, 2014, CENG is included at ownership.
. The nuclear fleet capacity factor, which excludes Salem,
decreased in 2015 compared to 2014 primarily due to a higher number of refueling outage days and non-outage energy losses, partially offset by a
lower number of unplanned outage days. For 2015 and 2014, planned refueling outage days totaled 290 and 275, respectively, and non-refueling
outage days totaled 82 and 92, respectively
. The nuclear fleet capacity factor, which excludes Salem,
increased in 2014 compared to 2013. While total days offline
124
(a)
Source: BALTIMORE GAS & ELECTRIC CO, 10-K, February 10, 2016 Powered by Morningstar® Document Research℠
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