Stone to Silicon

Energy · 1957

Pressurized water reactor

Shippingport adapts the submarine reactor design for civilian power.

Hyman Rickover's naval program powered USS Nautilus in 1955, and the same PWR concept ran Shippingport in Pennsylvania from December 1957. PWRs became the dominant reactor type, about two thirds of the world's roughly 440 reactors.

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What it built on 3

What it led to 3

Related measurements

The dashed line marks when it first worked.

Nuclear electricity generation Latest: 2.81k TWh (2025) Source: Our World in Data

Share of electricity from low-carbon sources Latest: 42.6 % (2025) Source: Our World in Data

World electricity generation Latest: 31.8k TWh (2025) Source: Our World in Data