Controlled environmental radioiodine tests at the national reactor testing station. 1965 progress report

Technical Report · Tue Feb 01 04:00:00 EST 1966

OSTI ID:6099457

Adams, D R; Bunch, D F; Gammill, W P; Hawley, Jr, C A; Markee, E H; Tiernan, M W

The CERT project consists of a series of planned releases of radioiodine over different vegetation and during various meteorological conditions, with the prime objective being to measure the relationships involved in the passage of radioiodine through the air-vegetation-cow-milk-human chain. The results of the first five tests in the series, which started in the spring of 1963 and is continuing, are reported. Each test was conducted under measured meteorological conditions and over prepared sampling and grazing courses. Two tests were made over open-range type vegetation, two over irrigated pastures, and one over snow-covered ground. Two tests were conducted under lapse conditions, two under inversion conditions, and one under neutral conditions. In each case, known quantities of elemental /sup 131/I/sub 2/ were released. Relationships determined included air-grass ratios (deposition velocities) which ranged from 0.1 to 1.0 cm/sec; effective half life of /sup 131/I on grass of 3.5 days and 5.5 days; the time of peak activity in milk at two days following a release; milk-grass ratio (C/1:C/g); total /sup 131/I secreted in milk by cows to that ingested by cows; adult human thyroid uptake fraction (inhalation); and based on a breathing rate of 20 m/sup 3//24 hours, the ratio between infinity mills ingestion dose and infinity inhalation dose for a single release was calculated. Data, descriptions of methods, and calculations are reported. Discussions of resuspension factors and particle sizes and behavior are also included.

• Research Organization: USAEC Idaho Operations Office, Idaho Falls
• OSTI ID: 6099457
• Report Number(s): IDO-12047
• Country of Publication: United States
• Language: English

Related Subjects

500300 -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (-1989)
510302* -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- Terrestrial Ecosystems & Food Chains-- (-1987)
54 ENVIRONMENTAL SCIENCES
560171 -- Radiation Effects-- Nuclide Kinetics & Toxicology-- Man-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BODY
BODY FLUIDS
CATTLE
COWS
DAYS LIVING RADIOISOTOPES
DOMESTIC ANIMALS
DOSES
ENDOCRINE GLANDS
ENVIRONMENTAL EXPOSURE PATHWAY
ENVIRONMENTAL TRANSPORT
FOOD
FOOD CHAINS
GLANDS
GRASS
INGESTION
INHALATION
INTAKE
INTERMEDIATE MASS NUCLEI
IODINE 131
IODINE ISOTOPES
ISOTOPES
MAMMALS
MAN
MASS TRANSFER
MATERIALS
METEOROLOGY
MILK
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PLANTS
PRIMATES
RADIATION DOSES
RADIOISOTOPES
RUMINANTS
SEASONAL VARIATIONS
THYROID
UPTAKE
VARIATIONS
VERTEBRATES