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APPLICATION FIELD
Determination of surface activity by measuring beta
radiation in intensive gamma-background after
- defect or accident in a nuclear power plant,
- atomic blast.
CHARACTERISTICS
- In situ gamma and gamma + beta measurements on
large surface with registrating the place of the
measurement at the same time,
- Determination of beta surface activity on subtraction
principle even in the case when the disturbing
gamma-background is several hundredfold of the
dose-effect coming from the surface,
- Measuring range comprehending six orders of
magnitude,
- Measurement start from a distant computer,
- Automatic measurement time,
- Environment-proof housing.
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BNS-298 DECO contains two transmiters with the same construction, one detector
of which measures only gamma-radiation with beta-filter while the other one measures total
gamma+beta radiation. In every 2 seconds the transmitters calculate the dose-effect
of the caesium equivalent, the data of the measuring error and the time that has passed
from the begining of the measurement and send these survey data to the BETADECO software
on request through serial line. The software does subtraction, the value of beta-activity and
determines its error. The automatic measurement continues as long as the statistical error drops
under the given value or the detection limit decreases below the preset value or the allowed
maximum measuring time passes. Besides, user can make adjustments, calibration, tests and
visualizations as well as storing survey data and results with BETADECO software.
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