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from the northern Rongelap lagoon. Most of the activity
in marine specimens was contributed by Zr{dup 95}-Nb{sup
95} and Ru{sup 106}-Rh{sup 106}. No fractionation of
Sr{sup
89}-
Sr{sup
90}
occurred in tissue of fish
analyzed. Residual soil contamination was confined to
top several inches of soil, with movement indicated down
to the lens water. The major radionuclide found in the
tissues
801.
of land animals
and plants was Cs{sup 137}.
The
island soil and lagoon water were contaminated
principally by rare earth elements, Ru{sup 106}-Rh{sup
106} and Zr{sup 95}-Nb{sup 95}. Amount of activity in
specimens analyzed was generally proportional to
external gamma reading in each of the areas.
CASTLE/residual radiation ;FALLOUT/uptake ;
KEYWORD (S)
MARSHALL ISLANDS/radioactive contamination
;PLANTS;
ANIMALS ; WATER; SOILS; CASTLE; ENVIRONMENTAL STUDIES;
ZIRCONIUM 95; RUTHENIUM 106;RHODIUM 106;CESIUM 137;
ECOSYSTEMS ; FALLOUT; UPTAKE
Item
85
150.
110.
REPORT NUMBER
70.
710.
PERSONAL AUTHOR (M)
WT--1661
PRIMARY TITLE (M)
Proof test of AN/TVS-1
equipment.
CORPORATE SOURCE
Project 6.14
Scarborough,
G.D.;
[of]
(XE-3)
flash-ranging
Operation Hardtack
Van Sant,
J.S.
Army Signal Research and Development Lab.,
Monmouth,
NJ
(USA)
Fort
371. PUB. DATE (YYMMDD)
610124
34. CLASSIF. LEVEL TEXT
Unclassified
950.. ABSTRACT
(Supersedes ITR-1661) The overall objective of
this project was to evaluate the Peerless flash-ranging
set, AN/TVS-1 (XE-3), prior to its acceptance by the
United States Army Signal Research and Development
Laboratory
(ASRDL).
The
specific objectives were to
determine the operational capability of two types of
automatic shutter-activating units and to compile data
on shutter speeds and filter values at different ranges
from point of burst of various low-yield nuclear
devices. The project participated in eight detonations
at the Nevada Test Site
(NTS).
Consistent,
reliable
operation of the equipment tested was obtained at 18
miles from burst. This distance was the maximum
line-of-sight range that was available for_a suitable
observation point. Although both types of dbitomatic
shutter-activating units performed equally well under
conditions of high visibility such as existed during the
test participations, the modified version was varied
transmission factors such as existed during the test
participations, the modified version was considered most
applicable. Camera settings were kept constant, but
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