Reactor Outside
This is a TNT fueled power station
 
       
                 
Power Station Front
It is located next to a small town
 
       
                 
Reactor inside
The key is to convert a TNT explosion into stable redstone current
 
       
                 
Control Panel
All the functions of the Reactor are controlled from here
 
       
                 
Fuel Store
A cobblestone generator is used to push the TNT through a series of pistons then into the reactor
 
       
                 
Power Generator
The exploding TNT 
pushes the cart enough to start it rolling down the incline, when it 
hits the detector rail current is generated and the cart is returned to 
the top for the next explosion.
 
       
                 
Reactor Shield on
Water shielding protects the building structure from the explosions.
 
       
       
                 
Fuel injector
Fuel is delivered by the pistons to the top of the reactor, when it hits the redstone current it falls in
 
       
                 
Power Transformer
The power is generated in pulses, by feeding it through these repeaters i can get a steady output
 
       
                 
The Final Result
Of course I could have just used a redstone torch and got the same result - but that is not as fun.