> ... which has adversely affected public health or safety.

Why would they tack that on at the end of a very long sentence? Because they don't want to talk about the loss of USS Scorpion. They mention the sub once on the whole page and even misspell it as "Scorpian". Would not trust them as a source.

>Since the inception of the program, there has never been an accident involving a naval reactor nor a release of radioactivity

None of the theories put forward about the loss of the USS Scorpion have involved the reactor. Maybe they didn't discuss it because it wasn't relevant?