Massive quake hits Japan; Tsunami in Pacific, nations on alert

[mredskins]

Originally Posted by firstdown

I realize they retain heat but they must also keep producing heat for some period because of how much time has passed and they are still that hot. The only other thing I could think of is that they have to lower the temp slowly to prevent cracking issues.

Something tells me it is not that easy and you may need a good understanding of nuclear physics to truly appreciate how it "cools" itself.