evaluate reactor model

Well, it looks like you are using LZH Condensators, (the blue +looking things) which don't necessarily work quite like normal components in that you have to recharge them with lapiz, otherwise they just take heat into them.
In your particular design, you would have to recharge a LZH condenser about every 80 seconds, otherwise they would wear out, and then your reactor would begin overheating.

Secondly, you see many neutron refectors in a line. (the white plates) they don't do anything unless they are placed next to uranium cells, so 8 of the ones in your reactor design are useless, while the others are actually doing something. (they make more power + a tad more heat)

Same with the cooling cells actually (the things with the vertical blue squiglies.)
Cooling cells are similar to LZH-condensators in that they must be next to a hot componet (uranium cell) to do much good, and they just hold heat, instead of get rid of it. However, cooling cells can get rid of their heat over time, unlike LZH-condensators.

For more information:

http://wiki.industrial-craft.net/index.php?title=Nuclear_Reactor

Not bad... explosion.
Better to use this or this, never exploding, but producing a good power. Or go to the "Good Reactors" topic and choose one.