Why is fresh uranium fuel safe to handle with standard PPE while “spent” fuel is so hazardous?

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My uninitiated mind would think that it would be the other way around.

I was watching a video about nuclear power. The guy being interviewed was wearing safety glasses and nitrile gloves while holding a uranium fuel pellet. Then the camera pans to a screen showing the robot handling spent fuel in the bottom of a 40-foot deep pool of heavy water. The pool is in a room behind a big red door with every “do not enter” warning imaginable. I would think the fuel would be less radioactive coming out than going in.

In: Chemistry

14 Answers

Anonymous 0 Comments

imagine it like that glow sticks you have to crack to start glowing.
Before you crack it, it’s has unreleased energy, but isn’t releasing (almost) any of that.
Once you crack it, it glows really bright. That’s when you use it.
After a while, it’s glow is too low to be useful, but still much more before you cracked it

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