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.

In March 2000, Calvert Cliffs Nuclear Power Plant opened a new chapter in nuclear power history by becoming the first plant in the United States to earn 20-year extensions of its operating licenses from the U.S. Nuclear Regulatory Commission. Calvert Cliffs Nuclear Power Plant replaced the steam generators in Units 1 and 2 respectively and with Unit 2 set world records in duration and weld quality for this type of replacement. These replacements, as well as other major upgrades, will help the plant continue to safely generate clean electricity for many years to come.

Key Facts
Location: Lusby, MD
Fuel Type: Nuclear
Reactor: Pressurized light water reactors

Capacity: 1,735 MWe
  Unit 1: 873 MWe
  Unit 2: 862 MWe

Online:
  Unit 1: 1975
  Unit 2: 1977

Operating License:
  Unit 1: 2034
  Unit 2: 2036

Ownership: Constellation Energy

Turbine Manufacturer:
  Unit 1: General Electric
  Unit 2: Westinghouse

Architect-Engineer/Constructor:  Bechtel Power Corporation

Environment
Calvert Cliffs Nuclear Power Plant maintains a comprehensive land, forest management, and wildlife protection program, selectively harvesting and replanting trees and ground cover to maintain wildlife habitats. Wild turkey and bobwhite quail flourish. We’ve enrolled 20 acres in the state's Conservation Reserve Enhancement Program, a program to plants trees and deep-rooted grasses to limit runoff and support wildlife.

Since the plant has been in operation, the environment at and around the plant has been rigorously monitored and the monitoring results reported to the Maryland Department of the Environment and the EPA to ensure that we continue to preserve the quality of the air and water.

Security
At Constellation Energy, the safety and security of our community, employees and neighbors is the top priority. Since Sept. 11, 2001, the company has built upon a strong foundation to further enhance site security.  Studies by the U.S. Government Accountability Office, the Department of Homeland Security (DHS) and the Progressive Policy Institute all confirm that nuclear power plants are the most secure facilities in the entire U.S. industrial infrastructure. 

Emergency Preparedness Information
At Constellation Energy, we devote extensive resources to plant security and emergency response to ensure the health and safety of the citizens’ who live and work in the communities around our plants. In the unlikely event of a plant emergency, we want you to have access to the information you need. We have compiled important information into three separate categories – Emergency Planning, Communicating with the Public and Protective Action Zones.

Emergency Planning
Please click here to see the following information:

• Roles & Responsibilities in an Emergency
• Regulatory Oversight
• Federal Regulations
• Contact Information:
  • U.S. Nuclear Regulatory Commission
  • Federal Emergency Management Agency
  • State and County Emergency Management Agencies
• Emergency Classifications
• Potassium Iodide (KI)
  • What is KI
  • When to take KI
  • Where is it available and what is the dosage

Communicating with the Public
Please click here to see the following information:

• Calvert Cliff’s Siren & Alert System
• Protective Action Guidelines
  • Shelter-in-Place
  • Evacuation
  • Suggestions for:
    • Children at School or Day Care
    • People with Special Needs
    • Pets
    • Livestock or Crops
  • Instructions to take Potassium Iodide
  • Emergency Reception Centers

Protective Action Zones
Please click here to the following information:

• Zones – 1 thru 8
• Reception Centers and Mass Care Centers
  • Calvert County
  • St. Mary’s County
  • Dorchester County

If you live near Calvert Cliffs, please review the emergency planning information provided by the:
Calvert County Emergency Management Office

For downloadable PDFs, please click on the link provided below:
2009 Calvert County Emergency Preparedness Calendar

U.S. Nuclear Regulatory Commission – Current Performance Summary
Calvert Cliffs Unit 1
Calvert Cliffs Unit 2