interesting clip of the advent of nuclear powered submarines. A simplified explanation with informative graphics makes it easily digistible with the factoid that 1 pound of u235 equals so many million pounds of coal or 250,000 barrels of oil is also quite telling. No wonder there was a drive for this type of propulsion.
The accompanying text reads as follows:

Explains how an atomic powered submarine operates. Includes scenes at the Knolls Atomic Power Laboratory in Schenectady and the submarine reactor test site at West Milton, New York.

John Sutherland Productions.
Creative Commons License. Public Domain.