Enjebi Island dose assessment

Technical Report · Wed Jul 01 04:00:00 EDT 1987

OSTI ID:5287042

Robison, W L; Conrado, C L; Phillips, W A

We have updeated the radiological dose assessment for Enjebi Island at Enewetak Atoll using data derived from analysis of food crops grown on Enjebi. This is a much more precise assessment of potential doses to people resettling Enjebi Island than the 1980 assessment in which there were no data available from food crops on Enjebi. Details of the methods and data used to evaluate each exposure pathway are presented. The terrestrial food chain is the most significant potential exposure pathway and /sup 137/Cs is the radionuclide responsible for most of the estimated dose over the next 50 y. The doses are calculated assuming a resettlement date of 1990. The average wholebody maximum annual estimated dose equivalent derived using our diet model is 166 mremy;the effective dose equivalent is 169 mremy. The estimated 30-, 50-, and 70-y integral whole-body dose equivalents are 3.5 rem, 5.1 rem, and 6.2 rem, respectively. Bone-marrow dose equivalents are only slightly higher than the whole-body estimates in each case. The bone-surface cells (endosteal cells) receive the highest dose, but they are a less sensitive cell population and are less sensitive to fatal cancer induction than whole body and bone marrow. The effective dose equivalents for 30, 50, and 70 y are 3.6 rem, 5.3 rem, and 6.6 rem, respectively. 79 refs., 17 figs., 24 tabs

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5287042
• Report Number(s): UCRL-53805; ON: DE88006759
• Country of Publication: United States
• Language: English

Related Subjects

560151 -- Radiation Effects on Animals-- Man
560161* -- Radionuclide Effects
Kinetics
& Toxicology-- Man
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKALI METAL ISOTOPES
ANIMAL TISSUES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
BONE MARROW
CARCINOGENESIS
CESIUM 137
CESIUM ISOTOPES
CROPS
DOSE EQUIVALENTS
ECOLOGICAL CONCENTRATION
ENIWETOK
ENVIRONMENTAL EXPOSURE PATHWAY
EXTERNAL IRRADIATION
FORECASTING
HEMATOPOIETIC SYSTEM
HUMAN POPULATIONS
INGESTION
INTAKE
IRRADIATION
ISLANDS
ISOTOPES
MARSHALL ISLANDS
MICRONESIA
NUCLEI
OCEANIA
ODD-EVEN NUCLEI
ORGANS
PATHOGENESIS
POPULATIONS
RADIOECOLOGICAL CONCENTRATION
RADIOINDUCTION
RADIOISOTOPES
REMEDIAL ACTION
RISK ASSESSMENT
TISSUES
WHOLE-BODY IRRADIATION
YEARS LIVING RADIOISOTOPES