U.S. Energy Information Administration - EIA - Independent Statistics and Analysis
Frequently Asked Questions
How old are U.S. nuclear power plants, and when was the newest one built?
The average age of U.S. commercial reactors is about 36 years. The oldest operating reactors are Oyster Creek in New Jersey, and Nine Mile Point 1 in New York. Both reactors entered commercial service on December 1, 1969. The newest reactor to enter service is Tennessee’s Watts Bar Unit 2, which began operation in 2016. The next-youngest operating reactor is Watts Bar Unit 1, also in Tennessee, which entered service in 1996.
The U.S. Nuclear Regulatory Commission (NRC) licenses U.S. commercial nuclear reactors for 40 years. Prior to termination of the original license, companies may apply to the NRC for 20-year license extensions.
Last updated: March 3, 2017
Other FAQs about Nuclear
- Does EIA have projections for energy production, consumption, and prices for individual states?
- How many nuclear power plants are in the United States, and where are they located?
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- How much electricity does a nuclear power plant generate?
- How old are U.S. nuclear power plants, and when was the newest one built?