BAB radiological air monitoring beacons

BAB – Air Monitoring beacon

The BAB air monitoring beacon is specially designed for the continuous monitoring of α & β artificial radioactive aerosols concentration combined with radon progenies and ambient gamma radiation.

Radiation type:

α and β

Detector type:

large area dual silicon diode, 2 x 360 mm²

Energy range:

α: 2 to 10 MeV – β: 80 keV to 2 MeV, adjustable artificial α ROI (adjustable in factory on request)

Temperature range:

BAB-A7: +5°C to +45°C (41°F to 113°F)
BAB-E: -20 °C to +45°C (-4°F to 113°F) with air conditioning

Compliance with CEM norms:

EMI emission: EN 61000-6-4
EMI immunity: EN 61000-4-3, Level 3

β measuring range:

10^-2 to 5.10⁴ Bq/m³

α measuring range:

10^-3 to 5.10⁴ Bq/m³

Display units:

Bq/m³, µGy/h

Sampling volume:

5 m³/h

Compensation:

Automatic ambient gamma background compensation and Radon progenies

Variant:

Internal shielding for use in high gamma background level

Alarms:

Acoustic and optic signals

Display:

Large dimension LCD screen
TFT 5.6″ 320xRGBx234 stripe 32k

Memorization:

92h for graphs and 21 days for measurements

Data format:

JBUS Modbus protocol

Communication:

2 x RS485, RJ45, ShortLINK or SkyLINK (radio)

Options:

External gamma probe

Can be used in controlled areas with high gamma background
Compensation of radon progenies

Use of standard sources for efficiency controls
Ruggedized, can be used on dismantling and purification sites

Available as stationary or mobile version
Can be connected to a central monitoring network and trigger a general alarm

The radioactive dust is deposited by air suction on a filter paper placed in the BAB beacons.
The suction flow rate is about 5 m3/h (it depends on dustiness and type of filter paper).
The flow rate is calculated from the depression measured between the filter and the pump. This allows to detect any tear or dust clogging.
Placed one centimeter above the sample, the detection system is based on two 300 μm thick silicon diodes with a surface of 360 mm2.
The analog signal from the two diodes is amplified by a preamplifier with an output range of about 30mV/MeV.
An amplifier increases the signal amplitude to 0.7V/MeV, and the signal is then used to produce the energy spectrum via an amplitude analyzer that encodes information to 512 channels.

Detector head lead shielded for use in high gamma background
Wireless data link, (ShortLINK or SkyLINK radio)

Effluent sampling and release
Remote local unit BAL-2

GJNOV software for local maintenance and data acquisition
Gamma GM-N probe for dose rate monitoring

Video

Bertin Instruments offers a broad range of sensors and turnkey network solutions for all tasks related to the monitoring of radiation in the environment including gamma dose rate measurement, spectroscopic analysis and air monitoring.
Probes and stations have been developed and optimized thanks to Saphymo’s expertise to provide customers with state-of-the-art instrumentation for ring monitoring around nuclear facilities, area monitoring, nationwide early warning systems and mobile & quick deployment solutions.