Last I checked there were military firetrucks on site with water cannons that could be operated from within the cabin. Civilian firetrucks were first used but having the operators fully exposed to the radiation was deemed unsafe.
I think the problem is that these systems are outright expensive on a per unit basis and there are economies of scale within some parts of the design(core?). I'm not intimately familiar with what parts cost more than others but you can see with a lot of powerstations(listing of powerstations around the globe, pretty neat stuff here -> http://en.wikipedia.org/wiki/List_of...power_stations) they originally started with smaller reactors and each reactor added was larger. Here are the reactor outputs at Fukushima.
1 × 460 MW (Unit 1 damaged)
4 × 784 MW (Units 2, 3, and 4 damaged; Unit 5 experiencing cooling problems)
1 × 1,100 MW (Unit 6 experiencing cooling problems)
Reactors planned 2 × 1,380 MW
Notice the planned reactors. 1.3GW each. That is gigantic in my book and I'm pretty certain there is a financial reason behind it unless they are after the epeen record
It would be nice to see modern Gen IV reactors put into place. In an ideal world I imagine it would be best to have more little reactors that can be scaled up and down with demand(molten salt reactors can easily do this). Sadly we don't live in an ideal world.



![Send a message via AIM to [XC] gomeler](images/misc/im_aim.gif)


). Sadly we don't live in an ideal world.

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