The explosive yield of the Tsar Bomba was purposefully reduced considerably, the fallout from a full yield test was too much even for the Soviets. Yes. This i

The explosive yield of the Tsar Bomba was purposefully reduced considerably, the fallout from a full yield test was too much even for the Soviets. Yes. This is because in the full yield version, you double the yield by adding a jacket of Uranium that is fissioned by neutrons from the fusion reaction. That makes it a very dirty extra 50MT, distributing those hot Uranium fission products far and wide.