The APT project's problems were beyond anything to do with the turbine.
I wonder how practical a mass-produced turbine hybrid car engine would be?
A small 50-100Hp turbine with an integrated brushless type generator, so you don't have to make a 20,000rpm gearbox. It could run at a constant speed/load just charging the battery
Safety containment shouldn't be any harder than a turbo. Modern control is trivial (lab turbo molecular pumps run at 100K rpm safely) . They can burn pretty much any fuel and should be hot enough to have very little particle exhaust.