Both the drywell and the wetwell are surrounded by a secondary containment vessel (or shieldbuilding) also built from reinforced concrete about a meter thick.
Rolf Ziesing, Westinghouse's director of nuclear licensing, said the shieldbuilding design "was the focus of intense regulatory review" and improvements were made as a result of concerns expressed by critics.
Growing support in the United States for anti-missile defences was highlighted by the recent vote of a Senate committee to back a bill that would mandate the building of a national missile shield for the United States as soon as technically possible.
Were the tax shelters that high-earners were encouraged to set up to shield themselves from high income tax rates actually better for building a sustainable, prosperous economy than the combination of low tax rates and no shelters?