Subfile: ERA input) . (Energy Research Abstracts); NTS (NTIS); INS (US Atomindex Country of Origin: United States Country of Publication: United States Abstract: A study was undertaken to reexamine thyroid absorbed dose estimates for people accidentally exposed to fallout at Rongelap, Sifo, and Utirik Islands from the Pacific weapon test known as Operation Castle BRAVO. analysis, The study included: (1) reevaluation of radiochemical to relate results from pooled urine to intake, excretion functions; (2) analysis retention, of neutron-irradiation studies of and archival soil samples, to estimate areal activities of the iodine isotopes; (3) analysis of source term, weather data, and meteorological functions used in predicting atmospheric diffusion and fallout deposition, to estimate airborne concentrations of the iodine isotopes; and (4) reevaluation of radioactive fallout, which contaminated a Japanese fishing vessel in the vicinity of Rongelap Island on March 1, 1954, to determine fallout components. The conclusions of the acute exposure study were that the population mean thyroid absorbed doses were 21 gray (2100 rad) at Rongelap, 6.7 gray (670 rad) at Sifo, and 2.8 gray (280 rad) at Utirik. The overall thyroid cancer risk we estimated was in agreement with results published on the Japanese exposed at Nagasaki and Hiroshima. We now postulate that the major route for intake of fallout was by direct ingestion of food prepared and consumed outdoors. 66 refs., 13 figs., 25 tabs. Major Descriptors: *BRAVO EVENT -- FALLOUT; *HUMAN POPULATIONS -- DELAYED RADIATION EFFECTS; *HUMAN POPULATIONS -- RADIATION DOSES Descriptors: AIR; DRINKING WATER; FOOD; IODINE 129; IODINE 131; NEOPLASMS; RADIOACTIVITY; RADIOECOLOGICAL CONCENTRATION; SOILS; THYROID Broader Terms: BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BIOLOGICAL EFFECTS; BIOLOGICAL RADIATION EFFECTS; BODY; CASTLE PROJECT; DAYS LIVING RADIOISOTOPES; DISEASES; DOSES; ECOLOGICAL CONCENTRATION; ENDOCRINE GLANDS; EXPLOSIONS; FLUIDS; GASES; GLANDS; HYDROGEN COMPOUNDS ; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; IODINE ISOTOPES; ISOTOPES; NUCLEAR EXPLOSIONS; NUCLEI; ODD-EVEN NUCLEI; ORGANS ; OXYGEN COMPOUNDS; POPULATIONS; RADIATION EFFECTS; RADIOISOTOPES; SURFACE EXPLOSIONS; WATER; YEARS LIVING RADIOISOTOPES Subject Categories: 560161* -- Radionuclide Effects, Kinetics, & Toxicology -- Man 510302 -- Environment, Terrestrial -- Radioactive Materials Monitoring & Transport -- Terrestrial Ecosystems & Food Chains -~- (-1987) INIS Subject Categories: C2110* -=- Radioisotope effects, kinetics & toxicology in man C2210 -- Radionuclide Ecology -- Terrestrial Ecosystems 10/5/626 01608946 Author(s): (Item 326 from file: EDB-85-115727 Weitz, R.; Thomas, C.; 103) Klemm, J.; Stuart, J.; Knowles, Title: Analysis of radiation exposure for naval units of Operatich CROSSROADS. Volume 1. Basic report. Technical report Corporate Source: Science Applications International Corp., (USA) Publication Date: Report Number(s): Note: VA 3 Mar 1982 p 170 AD-A-152702/7/XAB; SAI-84-1567-VOL-1 See Also Volume 2, Document Type: McLean, M. Report AD-BO90 8821 Language: English Journal Announcement: ERA8507 Availability: NTIS, PC AO8/MF AOl. Subfile: ERA (Energy Research Abstracts) . a Wn? no em Country of Origin: United States cae Country of Publication: United States cond Abstract: External radiation doses are reconstructed for crews of support “? and target ships of Joint Task Force One at Operation CROSSROADS, 1946. Volume I describes the reconstruction methodology, which consists of modeling the radiation environment, to include the radioactivity of lagoon water, target ships, and support ship contamination; retracing