Lung-clearance classification of radionuclides in calcined phosphate rock dust

Technical Report · Wed Aug 01 00:00:00 EDT 1984

DOI:https://doi.org/10.2172/6598771· OSTI ID:6598771

Kalkwarf, D R; Jackson, P O

Lung-clearance classifications for /sup 210/Pb and /sup 210/Po in airborne dust from elemental phosphorus plants were estimated for use with the lung clearance model proposed by the ICRP Task Group on Lung Dynamics. Estimates were based on measurements of dissolution rates for these radionuclides from sized dust samples into simulated lung fluid at 37/sup 0/C. The estimates were expressed in the classification terms of the model, i.e., D, W and Y, indicating lung clearance half-times of 0 to 10 days, 11 to 100 days and more than 100 days. Dust samples were obtained from two plants in the western United States, and dissolution trials were conducted on fractions containing particles with aerodynamic equivalent diameters (AED) of 0 to 3 ..mu..m and of 3 to 10 ..mu..m. The /sup 210/Pb and /sup 210/Po in each of these fractions were classified 100% Class Y. The specific activities of both radionuclides increased with decreasing AED of the particles. 11 references, 1 figure, 4 tables.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6598771
• Report Number(s): PNL-5221; ON: DE84016655
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
LEAD 210
LUNG CLEARANCE
POLONIUM 210
CHEMICAL PLANTS
DUSTS
PHOSPHORUS
SOLUBILITY
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CLEARANCE
DAYS LIVING RADIOISOTOPES
ELEMENTS
EVEN-EVEN NUCLEI
EXCRETION
HEAVY NUCLEI
INDUSTRIAL PLANTS
ISOTOPES
LEAD ISOTOPES
NONMETALS
NUCLEI
POLONIUM ISOTOPES
RADIOISOTOPES
YEARS LIVING RADIOISOTOPES
560171* - Radiation Effects- Nuclide Kinetics & Toxicology- Man- (-1987)