Here: have at it with a Swedish nuclear power plant simulator. Raise and lower the control rods, turn pumps on and off, open and close valves, just make sure you don’t blowup anything.
Go look at the Chernobyl tour to see what happens when you mess up.
The original page includes this context:
The control-room operators of the Kärnobyl nuclear power plant are telecommuting and are running the plant through the Web. However, the mean time between failure for the components of Kärnobyl is not great. Try to keep the reactor stable when component failures occur!