The Tennessee Valley Authority (TVA) reached another milestone on June 3 when operators at Watts Bar Unit 2—the nation’s newest nuclear power plant and the first added to the fleet in 20 years—synchronized its generator to the power grid, generating electricity from the plant for the first time (Figure 1).

1. Reactor Operator Bill Hahn synchronizes Watts Bar Unit 2 to the TVA power grid on Friday, June 3, 2016. Courtesy: TVA

Watts Bar Unit 2 has had a long and storied history. Ground was broken for the plant in 1973. However, construction was suspended in 1985 due to slower electricity demand growth, rising construction costs due to inflation and new regulatory requirements stemming from the accident at Three Mile Island in 1979, and regulatory concerns throughout the TVA nuclear fleet. At the time, Unit 2 was estimated to be about 80% complete with a total investment of about $ 1.7 billion.

In the years that followed, various pieces of equipment, such as pumps, motors, and valves, were salvaged for use in Watts Bar Unit 1 or in Watts Bar’s sister plant, Sequoyah.…

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