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BROOKHAVEN NATIONAL | 4Ue 30 ORY
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associateot ve ee tbe
975
SAFETY & ENVIRONMENTAL PROTECTION DIViSICN
f
TeLEPHOKE: (516) 345- 2,25
de
.
La7é
Mr. T. F. McCraw
USERDA/SS°
Washington,
—
.
Dear Tommy.
The trellowing :
a vreliminars :
o* the external radiation survey res
cs vor Wotte, Allis
tivik, and Rongelap
Atolls,
‘Other deters:
Tomne® ere to mie soa
survex are included in mv °
Peper,
Ff
a
bo bets
do se.ectet
avbitrarive: Worse |
gamma backgrouic " wrtrels!
At
ie
average of al! pre-siri ec 1on i aamte
+ O.4 URf/hr.
(plus cesmic
hrs
riv
The averaie
and Aiiuk Jsianc as
‘ese Locations, rhe
arma readings was 3.8
crrespends 1.
Tos re
er ocs .. +t
Island
ins
oe Tee oody 2amma
:
ites
i’
arr
CyeTage bepoooar
»
wR bri
.isted helow.
Annual Exposure (mR)
Utirik
Eorukku
Aon
36
37
36
At Rongelep sirvvess were
corner of the et >.
atell:
ta +
oS. ure
in all
t:
Eniaetok Islane mMicwayv clong
locatiors
(1°
Rongelap
9%
islands were tec ve eProgenecus tor
age" exposure rate 41'°. "his ure x
island, however, wa.
'Ficpent
to estimate an average
6 st ste
'
Ls about
twice
Unerua.
v2ackeie.
a TEcenciattneee
Aaterm
net
eeae
and slightiv tress * a
proor.
So
&
.aiad .n the nerthwest
ou Ftteast corner -
oud Reagelap Island
.ammna
fields over
the
vomace an “island averw
t the cata.
Rongetap
ba
‘lage feast end)
vt
promo mR vr, which
©
ar.nated
Marshalls,
eee erates a ame mane, oo om
+
,
reoorp Leng Tsiane.