For those wondering what "for over half a century" means: 1968 the nuclear submarine USS Scorpion sank and hasn't been recovered. It's certainly debatable whet

For those wondering what "for over half a century" means: 1968 the nuclear submarine USS Scorpion sank and hasn't been recovered. It's certainly debatable whether the current use of heavy oil in shipping is preferable to nuclear power. However I find it highly doubtful the civil sector could replicate the impressive track record of the US navy regarding operating nuclear reactors on ships and submarines.