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Calvert Cliffs

Calvert Cliffs

Located in Lusby, Md., Calvert Cliffs Unit 1 began generating electricity in 1975 and Unit 2 joined the system in 1977. Since then, Calvert Cliffs has continually set records for power production and worker safety.

The nuclear power plant is built on a 1,500 acre site on the western shore of the Chesapeake Bay, about 50 miles southeast of Washington, D.C. Its two units are capable of generating over 1,700 net megawatts (MW) annually, enough to power over 1 million average American homes each year.

Committed to Safety

Calvert Cliffs, like all U.S. nuclear energy facilities, is based on a “defense-in-depth” design, which means there are redundant layers of safety.  There are multiple layers of safety systems to provide water to the reactor core.  These safety systems, and their backup safety systems, are powered by multiple and redundant power sources.  Nuclear energy plants are built with multiple physical barriers, including thick, steel-reinforced concrete walls around the reactor to contain radioactive materials. 

Our employees are personally committed to safety.  They are highly-skilled workers and continually receive training to make our safe work practices even safer.  We have a culture of continuous learning and implement lessons learned from operating experience to continue to operate safe nuclear energy facilities.  Each employee has 100 percent accountability.  We welcome strict, daily oversight by the Nuclear Regulatory Commission (NRC).  We work with the NRC to ensure that all regulations are complied with - and exceeded.

Learn more about the safety of Exelon's nuclear energy plants.

Generating More Low-Carbon Electricity

As part of Exelon 2020, Exelon Nuclear launched a series of planned power uprates across the company's nuclear fleet that will generate additional generation capacity within 8 years without turning a spade of earth. Uprate projects improve the efficiency and increase electricity output of a nuclear generating unit through upgrades to plant equipment. The projects take advantage of new production and measurement technologies, new materials and learning from a half-century of nuclear power operations.

Emergency Planning

Calvert Cliffs employs a sophisticated emergency response plan to protect public health and safety approved by the Nuclear Regulatory Commission (NRC) and the state of Maryland. The emergency plan includes coordination with local counties, municipalities and school districts.

Supporting the Local Economy

The majority of Calvert Cliffs approximately 900 employees live in communities surrounding the plant. During refueling outages, the station employs several hundred contractors who boost the local economy during their stay.

Community Involvement

Calvert Cliffs aims to be a good neighbor and is very active in the local community.

  • Sponsorship.  The power plant sponsors a variety of community events and organizations.
  • Charitable Giving & Volunteering.  Calvert Cliffs employees give generously to the community through a variety of charitable activities, including the local United Way chapters and area schools. The plant also sponsors blood drives throughout the year, helping local hospitals. The station’s also contributes annually to the Christmas in April volunteer organization, the Believe-in-Tomorrow Children's Foundation, and the Tree of Angels Program to provide gifts to needy families in December.

Site Vice President: George Gellrich

Plant Manager: Mark Flaherty

1650 Calvert Cliffs Parkway
Lusby, Maryland

  • Number of units: 2
  • Total site net generation: 1,937 MW
  • 2014 net generation: 14.3 million MWh
  • Customers served: More than 1 million homes
  • 2014 capacity factor: 93.1%
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Calvert Cliffs Power Station