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This intense burst of high-energy neutrons is intended as the principal mechanism of killing, although a large amount of heat and blast is also produced. A common idea is that a neutron bomb "leaves the infrastructure intact"; however, current designs have yields in the kiloton range, the detonation of which could cause heavy destruction through blast and heat effects. A yield of one kiloton is not much for a nuclear weapon but it is nearly two orders of magnitude (100x) bigger than the most powerful conventional bombs. The blast from a neutron bomb may be enough to level almost any civilian structures inside the lethal radiation range
It created a blast equivalent to about 13 kilotons of TNT. (The U-235 weapon was considered very inefficient, with only 1.38% of its material fissioning.) The radius of total destruction was about 1.6 km (1 mile), with resulting fires across 11.4 km² (4.4 square miles). Infrastructure damage was estimated at 90 percent of Hiroshima's buildings being either damaged or completely destroyed.
The fireball touched the ground, reached nearly as high as the altitude of the release plane, and was seen and felt 1,000 km away. The heat from the explosion could have caused third degree burns 100 km away from ground zero. The subsequent mushroom cloud was about 60 km high (nearly seven times higher than Mount Everest) and 30–40 km wide. The explosion could be seen and felt in Finland, even breaking windows there.  Atmospheric focusing caused blast damage up to 1,000 km away. The seismic shock created by the detonation was measurable even on its third passage around the Earth. Its Richter magnitude was about 5 to 5.25.
The Tsar Bomba was a three-stage hydrogen bomb with a yield of about 50 megatons. This is equivalent to ten times the amount of all the explosives used in World War II combined.
Originally posted by jpm1602
With all due respect. How many rocks and sticks will it take to vanquish our foes in WW4?
Originally posted by smokingmonkey
It only took one small one to put Hiroshima out of commission for quite some time, and only one for Nagasaki. One nuke is plenty to cause mass chaos over an entire region even if you are miles from ground zero.
Some shelter designs have been proved capable
of withstanding overpressures of more than 300
psi. (An overpressure of 200 psi would be sustained
at a distance of about 0.5 miles from
ground zero of a 1 -megaton airburst . I 3 ) In Operation
Plumbbob (carried out in Nevada in 1957),
cylindrical structures of 10-gauge corrugated steel
and of concrete sewer pipe were buried at depths
of 1.5 to 3.0 m (5 to 10 ft). Pressures as high as
149 psi and radiation in excess of 100,000 rad were
experienced above ground (as would occur at
about 1 km or 0.6 mile from ground zero of a
1 -megaton airb~rst’~), but there was negligible
deformation of all of the shelters and negligible
radiation levels were recorded inside .45(p84)
Many varieties of expedient shelters were tested
people were not aware of the awesome destructive
potential of a single bomb, and the air raid
alarms were not maintained upon the approach
of the airplane that was carrying it. In Nagasaki,
investigations showed that scarcely any of the
approximately 400 persons who were in tunnel
shelters at the time of the attack received burns
or serious injuries. This fact gives credibility to
the estimate that 30% of the deaths and injuries
could have been averted had the tunnel shelters
been filled to their rated ~apacity.~~(p~) Carefully
built shelters, though unoccupied, stood up well
in both Hiroshima and Nagasaki. 28(P237)
At Hiroshima, persons who were in buildings of
better construction had a fair chance of survival.
Between 0.5 and 1.25 km from ground zero,
where casualties in the open ranged from 90% to
loo%, the casualties in buildings varied with the
degree of structural damage (among other factors).
In buildings sustaining light damage, 51 % of the
occupants escaped injury. 13(p547)
Myth: In the worst-hit parts of Hiroshima and Nagasaki where all buildings were demolished, everyone was killed by blast, radiation, or fire.
° Facts: In Nagasaki, some people survived uninjured who were far inside tunnel shelters built for conventional air raids and located as close as one-third mile from ground zero (the point directly below the explosion). This was true even though these long, large shelters lacked blast doors and were deep inside the zone within which all buildings were destroyed. (People far inside long, large, open shelters are better protected than are those inside small, open shelters.)
Many earth-covered family shelters were essentially undamaged in areas where blast and fire destroyed all buildings. Figure 1.5 shows a typical earth covered, backyard family shelter with a crude wooden frame. This shelter was essentially undamaged, although less than 100 yards from ground zero at Nagasaki.4 The calculated maximum overpressure (pressure above the normal air pressure) was about 65 pounds per square inch (65 psi). Persons inside so small a shelter without a blast doorwould have been killed by blast pressure at this distance from the explosion. However, in a recent blast test,5 an earth-covered, expedient Small-Pole Shelter equipped with blast doors was undamaged at 53 psi. The pressure rise inside was slight not even enough to have damaged occupants' eardrums. If poles are available, field tests have indicated that many families can build such shelters in a few days.
The great life-saving potential of blast-protective shelters has been proven in war and confirmed by blast tests and calculations. For example, the area in which the air bursting of a 1-megaton weapon would wreck a 50-psi shelter with blast doors in about 2.7 square miles. Within this roughly circular area, practically all them occupants of wrecked shelters would be killed by blast, carbon monoxide from fires, or radiation. The same blast effects would kill most people who were using basements affording 5 psi protection, over an area of about 58 square miles.6
Based upon what the U.S. has stated No one is more prepared than Russia, please show me your sources and I'll show you mine.
Originally posted by masqua
reply to post by Breifne
Russia, I don't believe, can compare to China's ability to survive an exchange. If it was an exchange between Russia and America, there is no doubt the Chinese would rule the world for centuries afterwards simply because they have the sufficient numbers in population.