ML071640023

Enclosure 4 - Calvert Cliffs Nuclear Power Plant Earns a Place in History

ML071640023
Person / Time
Site:	Calvert Cliffs
Issue date:	05/31/2007
From:	Constellation Energy Group
To:	Office of Nuclear Reactor Regulation
Kimberly Sargent, OCA, 301-415-1776
Shared Package
ML071640019	List: ML071580925 ML071640020 ML071640021 ML071640022 ML071640023
References
CORR-07-0093
Download: ML071640023 (1)

Text

Media Corporate Communications

1-888-232-1919 constellation.comIn the early 1970s, Calvert Cliffs became the rst nuclear powerplant team in the U.S. to work through an Environmental Impact Statement under the 1969 National Environmental Policy Act (NEPA). The environmental studies conducted concluded thatCalvert Cliffs would produce electricity safely and efciently in concert with the delicate environment of the Chesapeake Bay. In 1975 and 1977, with an Environmental Impact Statementapproved by the federal government, Calvert Cliffs began operations. The U.S. Nuclear Regulatory Commission licensed reactor Unit 1 through 2014 and Unit 2 through 2016. In 2000, Constellation Energys Calvert Cliffs made history again by becoming the rst nuclear power plant in the nation to earn extended licenses from the U.S. Nuclear Regulatory Commission. The extended licenses represented a commitment to produce safe, reliable and efcient electricity at Calvert Cliffsthrough 2034 and 2036. In 2003, Constellation Energy reached a world record by safelycompleting the Calvert Cliffs Unit 2 outage in 66 days. The outageincluded refueling, replacing the Unit s two steam generators lowerassemblies, refurbishing the steam generator upper assemblies,and replacing the Units two main step-up transformers. During 2004, Constellation Energy achieved another U.S. ener gyindustry record for duration in replacing three low-pressure turbines on Calvert Cliffs' Unit 1. The outage team completed this replacement ve days ahead of schedule, working 105,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> injust 20 days with an excellent industrial safety record. Calvert Cliffs Nuclear Power Plant Earns a Place in HistoryLocated about an hour south of Washington, D.C., Constellation Energys Calvert Cliffs Nuclear Power Plant is an importantpart of Constellation Energys generation eet. The Constellation Energy team operates two nuclear reactors at Calvert Cliffs,generating about 1,700 megawatts of electricity each day enough power for a third of Marylands homes and businesses. In many ways, Calvert Cliffs has earned a place in nuclear energy history.

May 2007In 2005, Calvert Cliffs surpassed its own outage record completingUnit 2 refueling in 21 days one of the shortest outages ever

achieved for a Combustion Engineering-designed nuclear r eactor.During Calvert Cliffs 2006 and 2007 refueling outages, the plant

r eplaced and inspected systems and equipment as a pr oactive measur e to help ensur econtinued equipment reliability through theremainder of its operating license. Equipment enhancementsincluded reactor vessel head (RVH) replacements, a new turbinecontrol system, containment sump modication, upgrades to maincondenser and circulating water systems, as well as, r eactor coolant system inspection and maintenance.Constellation Energys Calvert Cliffs Nuclear Power Plantproduces enough electricity to power a fth of Mar ylands homes and businesses.