EFFECTIVE ARRIVAL TIME (HOURS)
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DISTANCE FROM GROUND ZERO (MILES)
Figure 1. Approximate gamma dose rates (roentgens per hour) at 3 feet above
the ground, one day after the detonation. From Glasstone (40).
2.
Residual Radiation
To assess potential effects of low-level residual radiation persisting
on Rongelap, Utirik, and Bikini, periodic monitoring of the inhabitants of
these atolls as well as samples of native flora,
were performed.
E.
fauna,
soil, and marine life
These studies are discussed in Section X and Appendix II.
Data Evaluation
Reevaluations of dose estimates are planned or under way using more sophisticated technology and computer methods currently available, and it is possible dose estimates may be increased. In the meantime the dose calculations
previously developed will continue to be used.
While quantitative variations in dose estimates have an obvious impact
on dose/effect correlations, other considerations are equally important in
these studies, especially regarding radiation induction of thyroid neoplasms
(caveats regarding thyroid dose estimates are discussed in Section IX and Appendix II).
Risk probabilities for development of neoplasms secondary to radiation
have classically been derived for malignant tumors of specific organ systems.