Earthquakes topple buildings not basements. Most plants I have been to have significant portions of the building underground so I am not sure how this would apply as long as it is not on the fault lines of which it has none. Of course there are the trenches off shore.
Table 3-1 of the .pdf,....
public perception is that Puerto Rico is an earthquake waiting to happen,....
a BIG earthquake,....
if you expect public perception to not matter then revisit the FLEX response to beyond-design-basis external event,...
then consider that IF someone is going to build nuke power capability then maybe that massive earthquake survivability should not be considered as BDBEE but should be the design basis,....
because if I wanted to stop a nuke in PR that's part of how I would lobby against it,....