Re: There goes the neighborhood...
And where would any of this radiation go in case of an earthquake? The steel of the hull itself is mildly irradiated from the neutron blast of the bomb, most other radionucleides will have washed away by now. The ship itself in unlikely to be filled with large amounts of explosives (and even then it's under several hundred feet of ocean to contain any particulate). So even IF there was an earthquake, the worst that can happen is that it shifts a bit, some radioactive particulate is stirred up and quickly diluted by seawater and maybe some fish ingest just a bit more radioactive dust than usual. most of that will pass straight through them. It'll be just fine. This ship is not something to worry about.