Notes on Mtg, 25 Aug '5l
for the Jangle Operations, the main structure was based on Trinity, the
only operation which was applicable in that case. (Bee the reference
of Footnote 1 for a complete description of the assumptions used and
procedure followed.)
The curves resulting from this
calculation having teen fitted
to the peak Trinity intensity (the hot spot at about 25 miles), their
predictions then rm high at larger distances for other shots, as com
pared with measurements. Results also depend on the assumed cloud height
and wind velocity, since these are important parameters.
A calculation made by Teller based on Trinity data and using
i/r* as the fall-off with distance gave a figure of 25 r as the integrated
dose to be expected on Xwajalein.
Further discussion indicated that the
hazard to Kwajalein would indeed not be so great as
predicted by Felt's
calculations,
It was Teller's opinion that a shot on Eniwetok was not out of
the question, in view of the distance between that atoll and Kvajalein,
if one chose a time when the wind was in the opposite direction and made
advance preparations to evacuate Kwajalein. He pointed out that this
is a military installation, so that evacuation would not be exceedingly
difficult. As for the small atolls populated by natives, he believed
that, since monitors would have to be stationed in these points in any
event, they could also be evacuated if readings indicated the necessity.
As soon as it became clear that the fall-out problems were
not insurmountable for an asswmed shot at Eniwetok, the group agreed that
Eniwetok was the mst feasible site for the super.
Tt is not believed that a shot at Bniwetok would deny us the
use of that proving ground for some serious time afterward, in view or
the rate of decay of the radiation.
The blast damage may not be a major
problem, either. There is, of course, always the remote possibility of
the shot's sending a tidal wave over Parry; it was pointed out, however,
that this would happen only in the case of overcomplete success.
Bogallua was suggested as a logical site, since it is the
furthest island from Parry and already has wiring facilities and the
like. Probably all members of the operation would be evacuated from
Bnivetok Atoll before the shot, with the exception of the firing party,
necessary wonitors and security personnel. It is believed that there
- would be no appreciable danger to people in a suitable structure at~ 20
piles.