Normally, the State and Reactor nuclear generation spreadsheets accessible through this web page are updated within a few days of the publication of the Electric Power Monthly. We therefore alert our customers to the following notice on an anticipated delay.

Due to the implementation of the new EIA-923 survey form, the EIA’s normal April release of its Electric Power Monthly will be delayed. Because that release would have contained December data from the Forms EIA-423 and FERC-423, a special supplement will be issued with tables summarizing those data. Approximately at the end of May, the Electric Power Monthly is expected to be released with January 2008 data for all categories, including delivered fossil fuel prices. Subsequent editions are expected to be published approximately every three weeks until our normal schedule has been reached.

The United States is the world's largest supplier of commercial nuclear power. In 2005, there are 104 U.S. commercial nuclear generating units that are fully licensed to operate. (Note: One reactor, however, Brown's Ferry unit 1 has been shut down since 1985. Therefore, some sources cite only 103 units.) Together, they provide about 20 percent of the Nation's electricity. Individuals not familiar with the nuclear industry may wish to consult the introductory feature for general information.

December 2007: Capacity Factor Contributes to Record Nuclear Generation: According to preliminary data, the U.S. commercial nuclear industry supplied more electricity in 2007 than in any prior year. This was made possible, in part, by a capacity factor (the amount of power actually generated compared with maximum possible generation) of 91.8 percent, eclipsing the 2002 record of 90.3 percent. Generation in 2007 was 2.4 percent higher than in 2006, and 2.3 percent higher than in the record year of 2004. Of the 31 States with commercial nuclear capacity, 17 experienced increases in output. The largest increase at the State level was in Tennessee, where output was 4 million megawatt hours greater than in 2006, an increase of 16.3 percent. Monthly and cumulative data is reported by State and by Reactor.

Annual 2006 Data Revised: Final EIA Data shows slight increase in nuclear capacity. Monthly and cumulative data is reported by State and Reactor.

Annual 2005: EIA final data confirms that nuclear generation declined in 2005. The 2005 annual output was 781,986 thousand megawatthours, 0.8 percent lower than the record 788,528 thousand megawatthours provided in 2004. Capacity, however, was revised slightly upward to 99,988 MW(e) from the preliminary total of 99,973 MW(e). The State Summary Table displays the total nuclear output by month for each of the 31 States with nuclear reactors. The output for individual reactors is shown in the Reactor-level Table.

Annual 2004: Record Eclipsed: U.S. nuclear plants provided a record 788,528 thousand megawatthours, surpassing the U.S. and International record of 763,733 thousand megawatthours of last year (2003). The monthly and cumulative data is reported by State and by Reactor.

Annual 2003: Annual U.S. Nuclear Output at Record Level: U.S. nuclear plants provided a record 763,733 thousand megawatthours, a U.S. and International record. The monthly and cumulative data is reported by State and by Reactor.

Daily Data is available from the U.S. Nuclear Regulatory Commission on the operational status and downtime of each nuclear generating unit.

Annual Data is Available at the following location:

• U.S. nuclear generation, annually, since 1957 is available in table 9.2 of the Annual Energy Review.

Other Websites with Useful Information

Current information on a variety of topics (such as nuclear markets, security, employment) is available on the Nuclear Energy Institute’s web site at http://www.nei.org.

Timely articles on all aspects of the U.S. Nuclear industry can be found at One Nuclear Place and on the Topix web site.

The responsibilities of the Federal Energy Regulatory Commission are varied, ranging from regulation of oil pipelines to licensing of hydroelectric projects. Possibly of most interest to nuclear data users is the data that the Commission collects in support of its responsibilities related to the electric utility industry.