SECRET
The President
.
(ee De
evr onyea
*
fs,
Three other laboratory diagnostic shots will be readied on e
eontingent basis. One, a conservative backup for the ICEM-IREM
verheai, vill be fired only if the more sfvanced version scheduled
eeariter in the series doses sot com up to expectations.
ne, .
&
scheduled earlier does not give the
fired only if ite
desired results. The final eantingent shot:
will be fired only if it can lent
fo,
significant improvement |
The design of several of the devices concerned is not yet firm and
at is not possible to specify at the mment the exact sncunts of
muelesr materials to be expenied.
In Januery I shall subsit to you
‘a Listing of the shote planned, their individual Obsectives, e
| nd the
_Smounts of mucless materialsB conserned.
As you know, £8 has been eustonnry in the past to eontust eafety
tests of eertain designs nearing stockpile to establish that, if
detonsted aceifientally, no meclear reaction would oocur. It is
important that two designs being fired in their final version at
HARDTACK be sefety tested in advance. We would plan to fire these
safety shots in Kevada during December 1957. No signifieant melear
reastion is expected from the firings and no barard offeite.
two shots, up to|
_ of plutonium and |
In the
Urandum-235
would be expented. I request your authority to expend this material
for the purpose deseribed.
|
The Atomic Energy Comelasion is making every effort to insure that
the minimm.
.
the offsite fallout is held to
To thie end the higher yield shots are being fired in
|
wherever possible, ‘he following table lists
the total yield ant fission yield resulting from the CASTLE and
REDWING tast series (195% and 1956, respectively) and the estimated
total ani fission yields to be expested from the 17 diagnostic, 5
effects and one demonstration shots of HARDTACK:
ace Fe
YIELDS IN NEGATONS
ete ee
a
ER LIBRARY
REPRODUCEDAT THE DMIGHT, D. RISEREUN
aan
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Me.
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Total
ce
Fission
%
COS
X at”