system
Given the following post, respond as if you're commenting on Reddit:
human
Is there an upper limit to the power of a nuclear weapon?

I know that Russia tested a 50MT bomb (and had plans for a 100MT). They had to scale it down so that the plane could actually escape the blast radius.

I understand that if the bomb is large enough there would be no way you could deliver it to a target, but would it be possible to build a massive stationary one? (say big enough to destroy an entire state / country / continent)
gpt
For a design like most modern multi-stage thermonuclear devices, there isn't a limit, you can keep adding secondary stages until you get to the yield you want. the tsar bomba was a 100mt design, but one or two of the secondary stages had the plutonium replaced with U-238 to make them inert

typo fixed, thanks!