Environmental behavior of technetium in soil and vegetation: implications for radiological impact assessment
Thesis/Dissertation
·
OSTI ID:6300838
Significant radiological exposures have been estimated for hypothetical atmospheric releases of Tc-99 from gaseous diffusion facilities when vegetation-to-soil concentration ratios obtained from previously published laboratory experiments are substituted for default values assumed in regulatory models. To test the relevancy of these laboratory concentration ratios, field investigations were conducted. Concentration ratios obtained from field data were one to two orders of magnitude less than previously published laboratory values. Furthermore, field concentrations of technetium in soil and vegetation were observed to decrease with time subsequent to initial application of /sup 95m/TcO/sub 4//sup -/. The decrease of technetium concentrations in field vegetation is suspected to be the result of leaching by precipitation, particle removal by wind action and dilution by tissue growth. These processes appear to be active for technetium deposited on the surfaces of aerial portions of vegetation as well as for technetium incorporated within plant tissue via root uptake from soil.
- Research Organization:
- Tennessee Univ., Knoxville (USA)
- OSTI ID:
- 6300838
- Country of Publication:
- United States
- Language:
- English
Similar Records
Environmental behavior of technetium in soil and vegetation: implications for radiological impact assessment
Environmental behavior of technetium in soil and vegetation. Implications for radiological assessments
Sampling of technetium-99 in vegetation and soils in the vicinity of operating gaseous facilities. Environmental Sciences Division Publication No. 1550
Technical Report
·
Wed Mar 31 23:00:00 EST 1982
·
OSTI ID:5214254
Environmental behavior of technetium in soil and vegetation. Implications for radiological assessments
Journal Article
·
Wed Mar 31 23:00:00 EST 1982
· Environ. Sci. Technol.; (United States)
·
OSTI ID:5530762
Sampling of technetium-99 in vegetation and soils in the vicinity of operating gaseous facilities. Environmental Sciences Division Publication No. 1550
Technical Report
·
Wed Oct 01 00:00:00 EDT 1980
·
OSTI ID:5008976
Related Subjects
510301* -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- Soil-- (-1987)
510302 -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- Terrestrial Ecosystems & Food Chains-- (-1987)
54 ENVIRONMENTAL SCIENCES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
ECOSYSTEMS
ELECTRON CAPTURE RADIOISOTOPES
ENVIRONMENTAL IMPACTS
ENVIRONMENTAL TRANSPORT
GASEOUS DIFFUSION PLANTS
HOURS LIVING RADIOISOTOPES
INDUSTRIAL PLANTS
INTERMEDIATE MASS NUCLEI
ISOMERIC NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE SEPARATION PLANTS
ISOTOPES
MASS TRANSFER
NUCLEAR FACILITIES
NUCLEI
ODD-EVEN NUCLEI
PLANTS
RADIOISOTOPES
RADIONUCLIDE MIGRATION
ROOTS
SOILS
TECHNETIUM 95
TECHNETIUM 99
TECHNETIUM ISOTOPES
TERRESTRIAL ECOSYSTEMS
UPTAKE
YEARS LIVING RADIOISOTOPES
Terrestrial-- Radioactive Materials Monitoring & Transport-- Soil-- (-1987)
510302 -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- Terrestrial Ecosystems & Food Chains-- (-1987)
54 ENVIRONMENTAL SCIENCES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
ECOSYSTEMS
ELECTRON CAPTURE RADIOISOTOPES
ENVIRONMENTAL IMPACTS
ENVIRONMENTAL TRANSPORT
GASEOUS DIFFUSION PLANTS
HOURS LIVING RADIOISOTOPES
INDUSTRIAL PLANTS
INTERMEDIATE MASS NUCLEI
ISOMERIC NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE SEPARATION PLANTS
ISOTOPES
MASS TRANSFER
NUCLEAR FACILITIES
NUCLEI
ODD-EVEN NUCLEI
PLANTS
RADIOISOTOPES
RADIONUCLIDE MIGRATION
ROOTS
SOILS
TECHNETIUM 95
TECHNETIUM 99
TECHNETIUM ISOTOPES
TERRESTRIAL ECOSYSTEMS
UPTAKE
YEARS LIVING RADIOISOTOPES