In March 2019 further federal loan guarantees of $3.7 billion were given to the various build partners, taking total federal loan guarantees up to $12 billion. The Georgia Power CEO said the loan guarantees played a key role in reducing financing costs for the build. Also in March 2019, Georgia Power confirmed that the Unit 3 containment cap had been lowered into place and the reactor would be ready to load nuclear fuel in 2020. This was preceded by the containment vessel third ring, as well as reactor coolant pump and polar crane installation in unit 3 during 2018 and 2019. The containment vessel top head was set during a site visit by Secretary of Energy Rick Perry and executives of the plant's owners. Recent progress on unit 4 includes the installation of the final steam generator and pressurizer. Unit 4 is being constructed utilizing lessons learned from Unit 3 and from the failed Virgil C. Summer Nuclear Generating Station (V.C. Summer) project and as a result the order in which some components are being installed has been modified. On November 22, 2019 the third ring of the containment vessel was set for unit 4, and on December 8, 2019 the unit 3 shield building roof was set above the unit 3 containment vessel. On December 16, 2019 the control room of unit 3 became operational and is now available for testing systems. On February 11, 2020, Southern Nuclear announced that the final concrete placement inside the Unit 3 containment vessel was completed which will allow installation of the reactor's fueling machine. As of February 2020, assembly continues on the final top most vertical feature of the overall Unit 3 reactor building, the passive containment cooling system storage tank, which will be set on top of the Shield Building Roof.