Vogtle Unit 4 reactor undergoes final major test

Hot functional testing has begun for the Vogtle Unit 4 nuclear power facility in Georgia, the last series of major tests to be conducted before the initial fuel load.

Hot functional testing is conducted to verify the successful operation of reactor components and systems together. Essentially, it confirms that the reactor is ready for fuel load.

As part of the testing, the site team will begin running Unit 4 plant systems without nuclear fuel in the reactor and advance through the testing process toward reaching normal operating pressure and temperature. Nuclear operators will use the heat generated by the unit’s four reactor coolant pumps to raise the temperature and pressure of plant systems to normal operating levels.

After the normal operating temperature and pressure levels are achieved and sustained, the unit’s main turbine will be raised to normal operating speed using steam from the plant. During the tests, nuclear operators will be able to exercise and validate procedures as required ahead of fuel load.

Vogtle Unit 4 is projected to enter service in the late fourth quarter of 2023 or the first quarter of 2024.

The new Vogtle units are key components of Georgia Power’s commitment to delivering clean, safe, reliable, and affordable energy to its 2.7 million customers. The two new units, which will produce zero air pollution, are expected to power more than 500,000 homes and businesses.

Southern Nuclear will operate the new units on behalf of the co-owners: Georgia Power, Oglethorpe Power, MEAG Power, and Dalton Utilities.