—the technicians had to stay in the sealed blockhouse for much longer until the detonation effects dissipated. —
Wasn’t this the test shot where they had to evacuate and suddenly realized they didn’t have any protective clothing at all? They had to high-tail it out of there with sheets wrapped around their bodies?
Saw that on a program about the race for the ‘superbomb’. The Sovs lit one off in the arctic circle that was 50 megatons. Sakharov said while they could have went higher, any higher tonnage was a waste, because the fireball would be taller than the Earth’s atmosphere.