DETERMINATION OF THE CONCENTRATION OF AEROSOLS OF SHORT-LIVED DECAY PRODUCTS OF RADON

Journal Article · Sun Apr 01 04:00:00 EST 1962 · Atomnaya Energ.

OSTI ID:4818023

Kartashov, N P; Popov, G A

The filtration method used for determining the aerosol concentration is quite sensitive but it requires a complex apparatus which makes its use in the field too difficult. A simpler method was developed especially for measuring the concentration of aerosols containing short-lived decay products of Rn. The method is based on the increase of the alpha count rate in a chamber containing the air sample being tested. By determining the count rate at three specific points of the curve, e.g., at t/sub 1/ =2 min, t/sub 2/ = 15 min, and T/sub 3/ = 60 min, and solving the set of 3 equations, the numerical values of the efficiency coefiicients corresponding to Rn, Ra A, and Ra C may be obtained. Any shift in the radioactive equilibrium may be calculated from the set of curves. At relatively high Rn decay product concentrations (above 100 micromicrocuries/ liter) and at steady operation of the apparatus at which the mean-squares error does not exceed the expected statistical spread, the coefficients of the shift of the radioactive equilibrium may be determined. A scintillation emanometer'' consisting of the control equipment and two scintillation chambers was used to verify the theoretical predictions experimentally. The apparatus was calibrated with standard radiation sources and was tested in the field. The results indicated that in the mining ventilating system studied there is a complete equilibrium between Rn and its short-lived decay products. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-019193
• OSTI ID: 4818023
• Journal Information: Atomnaya Energ., Journal Name: Atomnaya Energ. Vol. Vol: 12
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

AEROSOLS
AIR
ALPHA PARTICLES
BISMUTH 214
CONTROL
COUNTERS
DECAY
DECONTAMINATION
DIAGRAMS
EFFICIENCY
FILTERS
FISSION PRODUCTS
GASES
HALF-LIFE
HEALTH AND SAFETY
INSTRUMENTS
LABORATORY EQUIPMENT
MATHEMATICS
MEASURED VALUES
MINING
POLONIUM 218
PULSES
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RADIATION SOURCES
RADIOACTIVITY
RADON
SAMPLING
SCINTILLATION COUNTERS
SENSITIVITY
STABILITY
STANDARDS
STATISTICS
TESTING
VESSELS