Three Mile Island Shuts Down After Pump Failure

But then what about the reliability of that backup hardware, especially if it isn't subject to the same kinds of loads as the primary?

At a certain point, "Shut everything down (safely)" is cheaper than having more redundant valvles, pumps, pipes, and more tubes in a series.

It is like RAID 1: you are more likely to have some kind of hard drive failure, but that hard drive failure is more likely to be recoverable.

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/CoukfUQMLZQ/three-mile-island-shuts-down-after-pump-failure

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