The Nucor system was forged by Kenneth Iverson (1925--2002), who transformed a failing nuclear instruments company into a hugely successful chain of steel minimills.

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Concerns also emerged last year about the accuracy of nuclear reactor monitoring instruments during testing.

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The vehicle is powered by what is essentially a nuclear battery that converts heat into electricity providing power to Curiosity's instruments as well as generating warmth during the frigid Martian nights.

WSJ: Curiosity, the New Mars Rover | Visualizer