materials and subjected to fallout from this type of burst.
Results should be forthcoming on the neutron flux and energy spectrum
as a function of distance and also as a function of angle from the axis
wdsoviees Full evaluation of field data should advance the state
of knowl®dge as to the type of protection, if any, required for bomb neutrons.
The experimental determination of the radioactivity from a thermonuclear
detonacion in various typical soil samples was sttempted so that a basis could
be obtained for predicting soil radioactivity for a nuclear explosion at_any
location. No data were obtained because of the bombing error on the
(Cherokee),
_——
‘Some data were obtained during ship-shielding studies on the relative
vadiation dose rates contributed by contamination of the air envelope, water
envelope, and the ship's weather surfaces.
Phantoms for depth dose measurements, in conjunction with stand rd
dosimeters worn externally, were exposed on two of the fallout ships. Data,
{indicate inconsistencies in the dosimeter
readings and the “piologicallySignificant depth dose.
Investigations on the relative effectiveness and cost of various proposed
ship and personnel rec'amation methods were made. These studies were
primarily conducted in conjunction with the fallout-collection ships.
A proof-test decontamination procedure was conducted on the falloutcollection ships. The proccdure consisted of firchosing, hand scrubbing
with detergent, and a second firehosing.
Verification was attempted of Washdown Effectiveness as a Shipboard
Radiological Countermeasure. The major fallout was encountered during
Bassoon Prime and the effectiveness of the washdown system on the contaminant from this shot is being studied.
2.1.3 Program 3, Structural Response
The primary objective of Program 3 and of the single, sizable Project
3.1 comprising the program was to obtain information regarding the effect
of the positive-phase length of blast from nuclear weapons on the response
of drag-type and semidrag-type structures. The secondary objective of
Project 3.1 was to study further the general problem of drag loading and
response of structures to blast forces.
This project on Operation Redwing was actually the second part of a
two-part study. The first part was conducted during Operation Teapot and
involved the response of four typical single-story, steel-frame, industrial
buildings to a 22-kt burst, with a relatively short duration positive-phass
air blast. The second part involved_the response of identical industrial-
building structures to an air burst
ween
¢
,
mm,
- 31 -
~~ with a relatively