accountof the low yleld of the device,
from Georze.
A ground sample was obtained
3.3.20 Shot
The Shot h device wes detonated on a barge in the northern
part of Bikini Lagoon at 0610 local time, 26 April 1954,
phase collectors were not activated for this event,
The twoe
Samples from the
intermittent fallout collector on How were obtained from Project 2.50.
This rroject did not partictpate in Shot 5, No satisfactory
samples were obtain* from Shot 6,
TABLE 3,2
Station
.
Shot 3
Failed to Close
Men
Victor
Oeece
Two-Phase Collector Operation
Shot 1
Row,
Yoke
Bravo
Fox
A surmary of collector operation
:
Satisfactory
Satiefactory.
.
Tare.
Damaged by flying debris
Pailed to Close
Satisfaetory
Did not operate: electrical
>
.
Snot 6
Feiled to close
Satisfactory
Satisfactory
Triggered before shot
failure
Did not operate; electrical
failure
Meck
Project 6.5
Barge
.
Jaret
Vary
Did not operate
:
:
.
Motor burned out before
shot on account of shot 1
Gamage
Satisfactory
Satisfactory
3.4 ANALYTICAL METHODS
3.4.1
Particle Size Separation
In order to meet the first objective cf this project, it was
necessary to size grade the sample in such a manner as to provide a’
sufficient quantity in each size range to perform the required analyses,
For this reason it was decided to use standerd sieves down to the
smallest particle size possible and the Roller analyzer below that
point. The limitations of these techniques are discussed in
Section 5.2.
The mixture of solid fallout and approximately 50 ml of the
chlorobenzene from the two-phase collector was slurried on a uh p sieve
and permitted to settle through the sieve. This procedure was repeated
three times. The sieve was then tilted and the chlorobenzene solution
that had settled through the sieve was re-added with a dropping pipette
so that the solution settled through an exposed section of the sieve,
When all the particles were washed to one side of the sieve, the sieve
was tilted in the other direction and the process repeated, Care was
exercised to keep one section of the sieve clear of lerge particles
22
SECRET ~ RESTRICTED DATA