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Estimates of the radiological dose from ingestion of /sup 137/Cs and /sup 90/Sr to infants, children, and adults in the Marshall Islands

Technical Report ·
DOI:https://doi.org/10.2172/5764822· OSTI ID:5764822
;
In this report, we examine whether the radiological dose equivalent due to the intake of /sup 137/Cs and /sup 90/Sr at a contaminated atoll in the Marshall Islands would be greater when intake begins as an adult than when intake begins as an infant or child. We found that generally /sup 137/Cs contributes 97 to 98% of the dose and /sup 90/Sr contributes only 2 to 3 %. We also found that the integral 30-, 50-, and 70-y effective dose equivalent estimated for intake beginning as adults is greater than that for intake beginning at any other age. There are two factors that cause the adult estimated dose to be greater than the dose to infants and children. The major factor is the consistently higher intake of local foods, and consequently higher intake of /sup 137/Cs, for adults. The second is a combination of changing body weights, fractional deposits, and biological half-life for /sup 137/Cs with age, and the reduced concentration of /sup 137/Cs in food with time. Consequently, the estimated effective integral dose equivalents for adults due to ingestion of /sup 137/Cs and /sup 90/Sr can be used as a conservative estimate or intake beginning in infancy and childhood. 95 refs., 4 figs., 10 tabs.
Research Organization:
Lawrence Livermore National Lab., CA (USA)
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
5764822
Report Number(s):
UCRL-53917; ON: DE89014001
Country of Publication:
United States
Language:
English

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Related Subjects

560160* -- Radionuclide Effects
Kinetics
& Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ADULTS
AGE GROUPS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
CESIUM 137
CESIUM ISOTOPES
CHILDREN
DOSE EQUIVALENTS
EVEN-EVEN NUCLEI
FOOD CHAINS
HUMAN POPULATIONS
INFANTS
INGESTION
INTAKE
INTERMEDIATE MASS NUCLEI
ISLANDS
ISOTOPES
MARSHALL ISLANDS
MICRONESIA
NUCLEI
OCEANIA
ODD-EVEN NUCLEI
POPULATIONS
RADIOISOTOPES
STRONTIUM 90
STRONTIUM ISOTOPES
YEARS LIVING RADIOISOTOPES