Those were what the Navy calls subsafe incidents, not nuclear incidents. There was no problem with the reactor. The problem was what one of my Navy instructors called "water in the people tank"--a flaw in the welds that seal the interior of the ship or structure against water pressure from the outside. The Navy took major steps to improve the QA on those welds as a result of these incidents; when I was in the Navy we did three different types of nondestructive tests and a single flaw, no matter how minor, meant you had to redo the entire weld.