It occurs to me that a since high temperature electrolysis<http://en.wikipedia.org/wiki/High-temperature_electrolysis>converts steam heat to chemical energy in the form of separate flows of hydrogen and oxygen, and high temperature fuel cells<http://en.wikipedia.org/wiki/Solid_oxide_fuel_cell>convert chemical energy to electricity and steam, that one can hook them together in a closed cycle electrical generator that simply requires a heat input of some type.
If the cathode of the electrolysis is capable of producing fusion energy from hydrogen at high temperature (ie: the Curie temperature of Nickel) and pressure, then the electrolytic pressure should be more than adequate to provide the heat input to the system and the actual steam pressure needn't be high.
