concentrations on several islands.
Subsequent to cleanup, an updated data
bank was developed including external gamma exposure rates and radionuclide
concentrations in the soil on all islands.
An updated assessment has been
completed for Enewetak Atoll which includes radiological dose estimates for
all proposed living patterns at the atoll. 4
In addition to resettlement options at Bikini and Enewetak Atolls, the
U.S. Government had an interest in evaluating the radiological condition of 10
additional atolls and 2 islands (together with Bikini Atoll this is referred
to as the northern Marshall Island Multi-Atol] Survey) downwind of the proving
grounds prior to termination of the Trust Territory Agreement in 1981.
About
half of these atolls such as Rongelap and Utirik are inhabited; some have had
a minimum of environmental monitoring and others none at all.
A radiological survey of the external gamma exposure rates and the
terrestrial and marine environments was conducted at these atolls in late 1978
as part of the Northern Marshall Island Survey (NMIS) to assess the
concentrations in different components of the environment.
The data from this
survey are being used to evaluate, in the form of radiological dose
assessments, the probable consequenses of living on any of these atolls.