SUBY
Radiological Survey of Downwind tolls Contaminated by 82.15
that ono survey mctor could not bo properly tore adjustod. Tho four remining
N/PDR@39, still operated cfficiontly and sccacd to bo in good working order.
.€mc (1) cach Beckman M5, and onc (1) cach LN/POR]274 wis brought alo:
for any low intensity checks necessary. Two (2) cach calibrated iN/POR-TLB, we:
on hand to scrvo as sparcs in the cvent of opcrational failure with the /N/PUR-:
None of these instrumnts woro roquircd.
6.
Tho average and ovcimim gaoma doso rates measured on tho various islanc
of cach atoll are plottcd in Figures 1 threugh 5.
All moasurcacnts were mde at
waist hoight unlcss cthorwieo intiicatcd, Tho moxtmim readings do not include
Moasurements made with the instrumcnt next to a contaminated surfacc,
Dotailed surveys were mido of all the inhabitcd loenlitics., Tynpicsl
readings are given in Tables 1 and 2 for tho nativo villago of Rongclap [siand,
and the TG 7.4 camp on Miwctak Island, In gencral, tho villages and thc caps
appeared te havo slightly lower avcrago doe ratcs than the remainder of tho
island,
This can perhaps bc ascribed to differcat geometry of tho contaninatios
and to slightly greater penctration into the loosc gravel in the native villag::
Tho desc rates inside the native huts apposred to bo almost tho samo as ths dos:
rato cuteide. The doso rato in the middle of tho military barracks, tcnts, and
shacks was 1/3 to 1/2 that outside. This reduction is probably largely a gcosc:
effect. The doso rato fcll off rapidly on tho bases below the high tide mrk,
There was no cvidence of rain washing off thc combaainatod mtcrial. The foila
on tho windward aides of tho islands appcarod ¥ ba slightly abowo avcrage con=
tamination.
°
Liz)
‘
READINGS
IY
uP
Ce
A
Location
fost
Rongolap Island (average)
Contor of village
Near comtral cistern
oT
Near southcrn cistorn
Noar northorn cistcrn
_
375
20
30Q °
220
350
TABLE2
“1%,
s
lecaticn
Eniwotak Island (avorege }
Moss hall
Tont,
cdgo of min camp
Latrino
Slecping quartcrs
Dispensary
IN
Ci
XK
Outside Desc
.
=
LR
Inside Doss
(ar/nr)
Batic_(ar/he)
260
2»
-Ws
260
160
2X
19
260
x
—
90
-
- 7