Trivia, Westinghouse was so backed up with orders in the 70’s they contracted CE to make vessels for them too. The RV’s at Comanche Peak were made in Chattanooga.
I think that you will find that Westinghouse never made reactor vessels. Steam generators and perhaps pressurizers were built at the Westinghouse facility in Pensacola (have no idea what happened to it).
The US reactor vessel vendors were Combustion Engineering and Babcock&Wilcox at its Mount Vernon, IN, works. There was talk a few years ago about the Mount Vernon works being started back up. I don’t who owns it now - McDermott or the newly revived B&W, or even someone else.