Automatic stationary radiation monitoring device based on АТ2327 alarm dosimeter designed for detection of gamma radiation sources in transportation vehicles crossing check points.
Features
| - Up to 10 highly sensitive smart probes in hermetic aluminum containers, simultaneously measuring intensity of gamma radiation |
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| - Audible and visual alarm at threshold exceeding |
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| - Automatic switch from background measuring mode to detection mode when photoelectric detector infrared beam is interrupted by transportation vehicle |
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| - Radiation monitoring of transportation vehicles in motion |
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| - Self control of components during operation |
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| - Extreme environment operation |
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| - Database of counting rate values and alarm threshold excesses |
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| - Reserve power supply - up to 6 hours of continuous operation with a fully charged battery |
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Application
| - Metallurgy industry |
| - Waste handling |
| - Cargo entrances in ports and railroad stations |
| - Nuclear industry |
Automatic stationary device for continuous radiation monitoring is designed as stationary equipment mounted on site based on АТ2327 alarm dosimeter. The alarm dosimeter principle of operation is based on gamma radiation smart probes BDKG-11/1 and/or BDKG-11/2 (SP), maximum quantity – 10 smart probes. When a transportation vehicle crosses area under monitoring, it interrupts infrared beam that passes from IR radiator to IR receiver of photoelectric detector, in this case all smart probes automatically switch from rated background measuring mode to detection mode. When preset threshold of counting rate is exceeded, the audible and visual alarm (AU) warns personnel about detection of a gamma source. During measurement, counting rate information is transferred from each smart probe to processing unit (PU) located remotely in control room, via RS485.
The processing unit displays measured values of the selected smart probe and real time. Alarm threshold exceeding or a failure of any system units is accompanied by audible and visual signals showing symbolically the problem location on the display. The processing unit is intended to setup thresholds for each smart probe, monitor smart probe state, correct the real-time clock, protect several service functions with a password and review counting rate and threshold exceeding history of any smart probe.
Specification
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| Number of smart probes |
up to 10 |
Detector
BDKG-11/1 |
NaI(TI) ø63х63mm |
| BDKG-11/2 |
NaI(TI) ø63х160mm |
Sensitivity, not less than
on 241Am |
| BDKG-11/1 |
12700 cps/mSv•h-1 |
| BDKG-11/2 |
30000 cps/mSv•h-1 |
| on 137Cs |
| BDKG-11/1 |
1960 cps/mSv•h-1 |
| BDKG-11/2 |
4900 cps/mSv•h-1 |
| on 60Co |
| BDKG-11/1 |
1030 cps/mSv•h-1 |
| BDKG-11/2 |
2500 cps/mSv•h-1 |
| radiation background 0.08 μSv/h |
| BDKG-11/1 |
150 cps |
| BDKG-11/2 |
370 cps |
| Sensitivity, on 137Cs, point source located to “+” mark on hermetic container |
| BDKG-11/1 |
60,8 ± 12,1 cps/kBq |
| BDKG-11/2 |
120 ± 24 cps/kBq |
Maximum input statistical
load BDKG-11/1, BDKG-11/2 |
at least 5•104 s-1 |
| Gamma radiation energy range |
0,05 - 3 MeV |
Instability of measuring results during
continuous operation |
not more than 5% |
Continuous operation time
AC supply |
at least 24 hours |
with fully
charged battery |
at least 6 hours |
| Maximum vehicle speed during measurement |
5 kmh |
Monitoring time
per vehicle |
max 20 s |
Operating temperature range
Processing unit |
+5 - +40 °С |
| other components and BDKG-11/1 |
-30 - +50 °С |
| BDKG-11/2 |
-15 - +40 °С |
| 3-level visual and audible alarm |
Operation mode
setup time |
not more than 5 min |
| Interface (cable communication) |
RS485 |
| Maximum width of checkpoint |
5000 mm |
Maximum distance
between a smart probe and the processing unit (cable communication) |
1000 m |
Protection class
smart probes |
IP57 |
| other components |
IP50 |
Radio disturbance
CEI/IEC CISPR 22:1997 |
Electromagnetic compatibility
CEI/IEC 61000-4-2:1995,
IEC 61000-4-3:1995 |
Power supply
AC mains 220 (+22;-33) V; frequency 50 (±2) Hz and accumulator battery at emergency 12,6 (+1,3;-1,6) V or 25,2 (+2,6;-3,2) V |
Complete set: processing unit, smart probes BDKG-11/1 and/or BDKG-11/2 in hermetic containers, alarm units, photoelectronic detector, terminal-block boxes, AC adapter, interface adapter, Manual, complete of assembly parts and accessories.
Backup power unit on additional order.
Alarm dosimeter AT2327 has pattern approval certificates of Republic of Belarus, Russian Federation, Ukraine and Kazakhstan.
It complies with IEC 61017-7 International standard requirements. They also conform with the 89/336/EEC directive complying with EN 61000-6-3, EN 61000-6-2, EN50371, EN61010-1 standard requirements.
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