Russian Prime Minister Vladimir Putin (R) speaks with employees of the Kalinin atomic power plant near Udomlya in the Tver region, on December 12, 2011.
Russian Prime Minister Vladimir Putin (R) speaks with employees of the Kalinin atomic power plant near Udomlya in the Tver region, on December 12, 2011. - 
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Russian shipbuilders recently announced plans to start putting large nuclear water vessels into operation in the next three years. The floating power plants would each carry a crew of 69 people and could potentially deliver power to cities of 200,000.

Putting nuclear reactors on a big boat may sound scary, but it's already pretty common, says Princeton research physicist Frank von Hippel. He joins Marketplace Tech host Ben Johnson to discuss.

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