Quote from Lucrum:
http://en.wikipedia.org/wiki/Electrolysis_of_water
If I'm not mistaken we did it chemistry class, as far as I know there were not any reactors around.
yeah, poor choice of words,
they call the process of high energy extraction (boiling and sparking with electricity, the reaction phase, which does have to be contained or controlled in an environment where it can be repeativitly conducted...