As if turbine aircraft are not outrageously expensive as it stands, hard to see the cost case for going nuclear. We've had nuclear vehicles since the 50's in submarines, it only makes sense if the vehicle can't access other fuels easily. Just because a patent app is put in does not mean they are very serious about it- Airbus just patented an airplane with a windowless cockpit and there are tons of other far-out patents in the system.