Nuclear power or nuclear weapons are the first things that come to mind when you hear the word "nuclear." Both of those are notorious for their horrifying strength. Chernobyl or Hiroshima don't need to be mentioned twice in order for someone to understand exactly what it means. When you consider that submarines were some of the most significant naval ships of the Second World War, it only makes sense that a nuclear sub would be a destructive tour de force.
In WWII, US submarines sank 1,314 hostile ships. Over 3,000 Allied ships were destroyed by U-boats. How many ships has the nuclear navy destroyed? Two. two ships. And just one while engaged in official battle. The first was a Pakistani submarine that sank an Indian ship in 1971. Then, in 1982, an Argentinian cruiser was sunk by a UK submarine during that country's invasion of the Falkland Islands. And as of right now, that is the extent of their maritime military power.