Radioactive Aerosol

Radioactive Aerosol

 

a natural or artificial aerosol with a radioactive dispersed phase.

Natural radioactive aerosols form as a result of the decay of radon isotopes emitted from the soil surface into the atmosphere, as well as during the interaction of particles of cosmic radiation with the nuclei of atoms of elements that are components of the air. The radioactive atoms thus formed precipitate onto particles of nonradioactive atmospheric dust. In addition, dust containing radioactive isotopes of potassium, uranium, and thorium is carried from the soil surface into the atmosphere by winds. A certain quantity of radioactive aerosols enters the atmosphere with cosmic dust and meteorites.

Artificial radioactive aerosols containing fission products and radioactive isotopes with induced radioactivity are formed within a certain radius from the explosion of a nuclear bomb, as well as in industrial or accidental radioactive emissions at atomic industry plants, in uranium mines, and in enrichment plants.

The composition of radioactive aerosols depends on their origin and on atmospheric conditions.

References in periodicals archive ?
A University of Texas research has shown that the amount of radiation emanating from the Fukushima nuclear disaster increased the atmospheric radioactive aerosol level in Washington from 10,000 to 100,000 times above normal level.
These same scientists also recognized but dismissed as negligible (perhaps prematurely) the inherent dangers to advancing friendly troops that inhale the resultant radioactive aerosol created by the exploding DU shells.
DU bursts into flame when it hits a target, releasing a deadly radioactive aerosol of uranium.
Citing a study published in 2014, Christoudias said Nicosia stood to suffer the same exposure to radioactive aerosols as did the Turkish town of Mersin.
"Probes of radioactive aerosols from monitoring stations Argayash and Novogorny were found to contain radioisotope Ru-106" between September 25 and October 1," the Rosgidromet service said.
"Probes of radioactive aerosols from monitoring stations Argayash and Novogorny were found to contain radioisotope Ru-106," Russia's Rosgidromet service said, according to the South China Morning Post.
A sampling of coverage in the 23 contributions: breathing zone exposure assessment, mechanisms of particle deposition, aerosol chemistry and physics, health effects of ambient ultrafine particles, nanoparticle cell penetration, radioactive aerosols, filtration and sampling of fibrous filters, radioactive aerosols of the Chernobyl accidence, and lung cancer risk associated with radon and thoron, among other topics.
The splitting up of material and components as well as the decontamination of floors and walls will produce some radioactive aerosols. These will be released into the atmosphere through ultra-high efficiency ventilation filters.
Until about 10 years ago, she says, severe-accidentmodels tended to ignore the quantity of radioactive aerosols that might be released, but recent studies have shown that a pressurized-water reactor, like N-Reactor, might generate tons.
This volume provides a summary of the physical, chemical, and thermodynamic phenomena taking place in nuclear reactor cores during the progression of reactor accidents; the formation and physical and chemical properties of the resulting radioactive aerosols; the timing and duration of the aerosol release from the core to the coolant system and containment; and the physical, chemical, and thermal-hydraulic phenomena that govern the removal of aerosols within the containment or other plant volumes through natural or engineered processes.