How to simulate a nuclear reactor on an analog computer (from Principles of Nuclear Reactor Engineering, Samuel Glasstone, 1955).

How to implement automatic emergency shutdown in nuclear reactors - vacuum tube digital logic time! Connecting the output of multiple cathode followers together to form a Wired-OR circuit. You know it's from the dawn of computing - even such a basic circuit is called by the book as a "computer".

(Principles of Nuclear Reactor Engineering, Samuel Glasstone, 1955)

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How to calculate the power output of a nuclear reactor - just multiply coolant flow and temperature rise.

But how do you multiply two numbers electrically in a meter, in 1955, while using as little active circuitry as possible, ideally without digital logic, transistors, or even tubes? The answer is a Wheatstone bridge!

(Principles of Nuclear Reactor Engineering, Samuel Glasstone, 1955)

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