THE SECONDARY DUST COMPONENT OF THE RADIOACTIVE CONTAMINATION OF THE GROUND LAYER OF THE ATMOSPHERE

Journal Article · Tue Oct 01 00:00:00 EDT 1963 · At. Energ. (USSR)

OSTI ID:4127587

Styro, B I; Garbalyauskas, Ch A; Lyuanas, V I; Matulyavichus, V P; Nedvetskaite, T N; Tomkus, I S

BS>In order to separate material lifted by the wind from the ground from finely dispersed radioactive dust in the atmosphere, samples were taken during July and August, 1961 at various geographic points, which included a sandbar separated from the mainland by 12-km wide bay, a piling placed in the water and points at the shore. The radioactive fallout was collected on the surface of distilled water placed in containers at a height of 0.8 m from the ground or about 5 m above the sea level. The water was changed every 10 days and the residue from evaporation at 500 deg C was calcined. The activity of the specimens was measured, taking the self-absorption into account, and the Sr/sup 90/ concentration was determined radiochemicaliy. Large amounts of solids were obtained at the sampling station surrounded by sandy areas. The minimum of activity of the fallout was obtained at the piling surrounded by sea water; its distance seems to represent the limit of the coprecipitation of continental dust with the radioactive fallout. The Sr/sup 90/ determinations indicated that about 10% of the total activity is due to the dry fallout.'' Assuming that the over- water deposit contained only negligible amounts of this secondary dust component, the activity carried by the fallout is estimated at 0.27 microcurie Sr/sup 90//km/ sup 2/ mm. It was concluded that whenever the secondary component exceeds 35%, it must be taken into account when calculating the cumulative activity due to fallout. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-18-004032
• OSTI ID: 4127587
• Journal Information: At. Energ. (USSR), Vol. Vol: 15; Other Information: Orig. Receipt Date: 31-DEC-64
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

HEALTH AND SAFETY
ABSORPTION
ATMOSPHERE
CALCINATION
CONTAMINATION
DISTILLATION
DUSTS
EARTH
EVAPORATION
FALLOUT
LEVELS
MEASURED VALUES
NUMERICALS
PRECIPITATION
PYROLYSIS
QUANTITATIVE ANALYSIS
RADIOACTIVITY
RADIOCHEMISTRY
RESIDUES
SAMPLING
SAND
SEA
SEPARATION PROCESSES
SOILS
SOLIDS
STRONTIUM 90
VESSELS
WATER
WIND