No, water is a very good radiation shield and also cools down the reactor. So basically the subs are quite safe under hundreds of feet of water until the materi

No, water is a very good radiation shield and also cools down the reactor. So basically the subs are quite safe under hundreds of feet of water until the material leaks out and contaminates the sea floor. https://www.businessinsider.com/sunken-soviet-nuclear-sub-leaking-radiation-into-sea-researchers-find-2019-7 https://www.businessinsider.com/sunken-soviet-nuclear-sub-le...