Here's a simple one [1] I had some fun with. (There's a Flash version too [2]).
That one's just a game, so I have no idea how accurate it is. But if you search you might find something that's used in some university's nuclear engineering program or something like that.
Very realistic ones used for actual training exist - this one [3] uses VR! - but those probably won't be online.
...yeah so long story short, I have had the "How do you LEARN that?" thought before, which led me to some very niche companies that sell some (very awesome) educational kit.
Maybe I could rig up an industrial-style control panel to an RPI and actually run a simulation on that. Why go virtual when you can build some cool boxes? I guess accuracy.
That one's just a game, so I have no idea how accurate it is. But if you search you might find something that's used in some university's nuclear engineering program or something like that.
Very realistic ones used for actual training exist - this one [3] uses VR! - but those probably won't be online.
[1] http://www.ae4rv.com/store/nuke_pc.htm
[2] http://esa21.kennesaw.edu/activities/nukeenergy/nuke.htm
[3] https://www.hitachi-hgne.co.jp/en/business/examination/simul...