Danger of Usable Nuclear Weapon and Earth-Penetrating Nuclear Weapon

On the other hand, an earth-penetrating nuclear weapon can penetrate only an earthpenetrating
nuclear weapon can penetrate only at most 20 meters underground and the
fireball produced by nuclear explosion will cause a pyroclastic flow, a stream of heated
rocks and ash, which contains various radioactive fission products and strong
radioactive matter induced by neutrons as illustrated in Fig. 12. This may cause another
the '21st century hell on Earth' instead of the 20th century hell on Earth, Hiroshima and
Nagasaki.
The 1993 UNSCEAR report estimated total deaths from cancer caused by fallout
or downwind of nuclear tests and accidents in power stations and nuclear factories
between 1945 and 1989 as 1,116,000 on the basis of the ICRP model, which had been
constructed mainly by use of the results of the RERF studies and where the effects of
internal exposure are paid little attention. If the effects from internal exposure to
residual radiation causing cancer death are more than fifty times as severe as those in
the ICRP model, then total cancer deaths caused by fallout become more than 60 million,
which is about 1% of the total world population.
Thinking of my responsibility as a scientist and survivor of the Hiroshima atomic
bombing, if the US cover-up policy had not been enforced and scientists had clarified
the severe effects of internal exposure to the residual radiation of the atomic bombings
before frequent large scale nuclear tests, then the nuclear weapon tests would have been
forbidden avoiding great loss of human life comparable or more to that in wars.
Success for the collective lawsuit of survivors, who are dying, would contribute to
promotion of the movement towards a nuclear weapon-free world by pointing out that
nuclear weapons should never be used by demonstrating the severe and inhuman nature
of internal exposure as well as extraordinary acute injuries and mass murder by the heat
rays, shock waves, blast and initial radiation. Especially now it is very important to
publicize inhuman character of the nuclear deterrence policies which assume ultimate
use of nuclear weapon and are largest obstacles to begin the negotiation of nuclear
weapon prohibition treaty.