*.

3.

REASSESSHEXT

With the foregoing as background, let us non atteapt to answer the
questions which the Congress has asked: Here the doses used by DoE-1982
correct (Robison 1982b)? Does it fo~lo~ that Rongelap is habitable? If
not,
what should be done?
It should.”benoted that the technical position has changed since
meager sampling
1982. Here data have been published so that the original
has become more robust. In addition, we shall consider the findings of
the Brookhaven National Laboratory, usin9 an imPortant method which
DOE-1982 did not consider, and also our own findings.*
The data base employed by DOE-1982 comprised the results of the
Northern Marshall Islands Survey of 1978 (September-Noveaber)which had
been plaaned as an aerial reco~naissance to map extsrnal gamma-ray
exposure rates (normalized to 1 meter above ground level) (Tipton &
Meibaum,1981) . no helicopters were employed, operating from a major
..
support vessel, the U.S.N.S. Wheeling.
..
Subsequently the Livermore Laboratory program was added to obtain
soil, water, vegetation and fish samples at each atoll “as time and
facilities might permit” (Robison et al, 1982, part 1). The time tsPent
at Rongelap Atoll permitted 7 days for 9 islands, of which the malor one
was Rongelap. Operating from a large ship that had to cruise at a
considerable distance offshore, and whose primary function was aerial
reconnaissance, restricted the terrestrial work significantly.
The radionuclides dealt with were five: cesium-137, which is
distributed throughout the body; strontium-90, a bone seeker:
.
plutonium-239.- 240 and americium-241, whit
which are tightly bound by bone, liver an
.
‘ves;~s:~:””
The Livermore group took.soil samples f om some 20 scattered
locations on Rongelap Island wlmse averagesr (picocuries/9ram)for O-1o cm
depth were: cesium-137, 12; strontium-90, 7.1; plutonium-239,-240, 2.6;
//
anericium-241, 0.9 (Table 3 #2).
This soil contamination provided th~)basis for human exposure in two
ways. “Radiations emanated from the grou;d or standing vegetation leading
to external dose. Radiations that emanated from food and water after
entering the human body were responsible for internal dose.

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B. Franke states that the enablikg legislation calls for study of
only the original findings and report. A second committee should
consider subsequent findings, and a .third group should execute its
recommendations.
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*

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