Internal Dose Assessment

The methodology of References 13 and 14, together with the FIIDOS code (Reference 15), provides a means of calculating the internal dose to a given organ or tissue, based on existing intensity measurements, film badge readings, or dose reconstructions. For internal exposures, airborne radioactive particles are assumed to be fully respirable with an Activity Median Aerodynamic Diameter of 1 micrometer (Reference 16). Based on radiochemistry data for Shots DOG, EASY, and ITEM, and the aforementioned intensity measurements, the veteran’s (50-year) committed dose equivalent to spinal nerve tissue from the inhalation of descending nuclear debris in the fallout on Enewetak Island is less than 0.01 rem. For the inhalation of resuspended fallout, a resuspension factor of 10−5m−1 is applied to the assumed 60 percent of the time spent outdoors, resulting in less than 0.01 rem to spinal nervous tissue.

Internal Dose Summary: The veteran’s total committed dose equivalent to spinal nervous tissue is less than 0.1 rem.

References

1. “Operation GREENHOUSE, 1951” DNA 6034F, Defense Nuclear Agency, 15 June 1983.

2. “United States Nuclear Tests, July 1945 through September 1992,” U.S. Department of Energy, DOE/NV-209 (Rev. 14), December 1994.

3. Veteran’s Nuclear Test Personnel Review (NTPR) file: service record, monitoring reports, and medical records.

4. “Operation GREENHOUSE, Communications Technical Report, 1951,” WT-45, Joint Task Force 3, 1951.

5. Microfiche records of film badge readings.

6. “Neutron Exposure for DoD Nuclear Test Personnel,” DNA-TR-84-405, Defense Nuclear Agency, 15 August 1985.

7. “DoD Nuclear Test Personnel Not Exposed to Neutron Radiation,” SAIC Memorandum to DNA-DFRA/NTPR, 7 September 1995.

8. The Effects of Nuclear Weapons, third edition, compiled and edited by Samuel Glasstone and Philip J. Dolan, United States Department of Defense and Department of Energy, 1977.

9. “Analysis of Radiation Exposure for Naval Personnel at Operation GREENHOUSE,” DNA-TR-82-15, Defense Nuclear Agency, 30 July 1982.



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