... and way more expensive than the newer technologies available for a fraction of the costs. Air independent technology has superseded nuclear powered subs. the article I read is behind a pay wall, but this old article is about the new tech.
https://nationalinterest.org/blog/th...obsolete-18908
Nuclear-powered submarines have traditionally held a decisive edge in endurance, stealth and speed over cheaper diesel submarines. However, new Air Independent Propulsion (AIP) technology has significantly narrowed the performance gap on a new generation of submarines that cost a fraction of the price of a nuclear-powered boat.
It has progressed further in the last 7 years since this article.
Other articles on stealth tech:
https://www.wsj.com/articles/the-nav...repair-92d79ac
https://www.express.co.uk/news/scien...k-australia-us