ae ee ence] ORFICGHALUSE ONLY
page 12
801.
set 5 wi
KEYWORD(S)
detection was made and this was from the equipment in
the plane on the occasion of King shot. Th¢
remaining
cases are accounted for as follows: Three cases were
timing-notification uncertainties which make it
impossible to state that the equipment was operating at
detonation time; one case where it is known
that the
equipment was operating at the right time, but there is
no record of the light signal. It is concluded that
light from a nuclear detonation can be detected to a
distance of about 600 km under favorable conditions. Any
further work should emphasize a basic study of the
phenomena involved in the transmission of light beyond
the horizon.
IvVY/;ATOMIC EXPLOSIONS/VISIBLE RADIATION
DETECTION; ATTENUATION; ABSORPTION
;
Item 21
150.
110.
REPORT NUMBER
PRIMARY TITLE (M)
UCRL--53840
Radiological conditions at Bikini Atoll:
Radionuclide concentrations in vegetation, soil,
cistern water, and ground water
animals,
70. PERSONAL AUTHOR( M)
Robison, W.L.; Conrado, C.L.; Stuart, M.L.
710. CORPORATE SOURCE
Lawrence Livermore National Lab., CA (USA)
750. PUBL . ANNOUNCEMENT
ERA~14:017157; EDB-89:038765;NTS-89:012887
371. PUB. DATE (YYMMDD )
880531
34. CLASSIF. LEVEL T EXT
unclassified
950. ABSTRACT
This report is intended as a resource document for
the eventual cleanup of Bikini Atoll and contains a
summary of the data for the concentrations of {sup
137}Cs, {sup 90}Sr, {sup 239+240}Pu, and {sup 241}Am in
vegetation through 1987 and in soil through 1985 for 14
islands at Bikini Atoll. The data for the main residence
island, Bikini, and the most important island, Eneu, are
extensive; these islands have been the subject of a
continuing research and monitoring program since 1974.
Data for radionuclide concentrations in ground water,
cistern water, fish and other marine species, and pigs
from Bikini and Eneu Islands are presented. Also
included are general summaries of our resuspension and
rainfall data from Bikini and Eneu Islands. The data for
the other 12 islands are much more limited because
samples were collected as part of a screening survey and
the islands have not been part of a continWing research
and monitoring program. Cesium-137 is the radionuclide
that produces most of the estimated dose for returning
residents, mostly through uptake by terrestrial foods
and secondly by direct external gamma exposure. Remedial
measures for reducing the {sup 137}Cs uptake in
vegetation are discussed. 40 refs., 32 figs., 131 tabs.
9003386
OFFICIAL USE ONLY