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 last one built?
The average age of U.S. commercial reactors is about 34 years. The oldest operating reactors are Oyster Creek in New Jersey, and Nine Mile Point 1 in New York. Both entered commercial service on December 1, 1969. The last newly built reactor to enter service was Watts Bar 1 in Tennessee, in 1996. In 2007, the Tennessee Valley Authority (TVA) voted to complete construction of Watts Bar 2. As of February 2015, the TVA estimates that commercial operation of Watts Bar 2 could begin between September 2015 and June 2016.
U.S. commercial nuclear reactors are licensed to operate for 40 years by the U.S. Nuclear Regulatory Commission (NRC). Prior to termination of the original license, companies may apply to the NRC for 20-year license extensions.
Last updated: February 20, 2015
Other FAQs about Nuclear
- How many and what kind of power plants are there in the United States?
- How much electricity does a nuclear power plant generate?
- How many nuclear power plants are in the United States, and where are they located?
- How old are U.S. nuclear power plants and when was the last one built?
- Does EIA have projections for energy production, consumption, and prices for individual states?