AT1320C Gamma Activity Monitor

Highly sensitive selective wide-range spectrometric scintillation gamma activity monitor is intended for measuring volumetric (specific) radionuclide activity in 131I, 134Cs, 137Cs, 40K, 226Ra, 232Th samples with 1 litre Marinelli beaker and 0.5 litre and 1 litre flat containers.

APPLICATIONS

  • Radiation protective measures in case of nuclear disasters
  • Radiation monitoring during decontamination operations
  • Potable water monitoring
  • Foodstuffs monitoring
  • Agricultural products monitoring
  • Mineral raw materials, soils, construction materials, wood products monitoring
  • Product, raw material and waste monitoring in mining and oil industry
  • Radioactive waste and effluent monitoring in nuclear industry

FEATURES

  • Spectrometric smart probe
  • Internal continuous automatic LED stabilisation of gamma counter energy scale, calibration integrity monitoring and automatic calibration with integrated KСl sample
  • Automatic radionuclide identification
  • Automatic background substraction
  • Sample activity measurement for materials with wide density range
  • Can be used both in stationary and mobile radiation monitoring laboratories
  • Methodological and metrological support of measurements
  • Measurement result log

OPERATING PRINCIPLE
 
Gamma activity monitor operating principle is based on the detection unit pulse-height distribution analysis. Controlling PC* reads the detection unit data on-line, processes it and displays on computer screen.
 
The installed PC application software is intended for controlling the activity monitor operation modes, viewing the recorded information, calculating gamma-radionuclide activity and measurement error for chosen measurement geometry, and managing electronic history log of measurement results.

  

Measurement procedure includes preliminary analysis of sample radionuclide composition. Activity calculation is carried out based on the results of monitored sample radionuclide identification procedure.

Gamma Activity Monitor has the pattern approval certificates of Republic of Belarus, Russian Federation, Kazakhstan.


* The Customer shall purchase a PC and a printer individually or use already available equipment (Minimum technical requirements to PC shall be agreed with the Manufacturer).

Features



Measurement result display

Detector

Scintillation NaI(Tl) ø63x63 mm

Measurement range for volume (specific) activity

 

     Measurement geometry - Marinelli beaker 1l

 

          131I

3...4·105 Bq/l (Bq/kg)

          134Cs

3...1·105 Bq/l (Bq/kg)

          137Cs

3.7...1·105 Bq/l (Bq/kg)

          40K

50...2·104 Bq/l (Bq/kg)

          226Ra

10...1·104 Bq/l (Bq/kg)

          232Th

10...1·104 Bq/l (Bq/kg)

     Measurement geometry - Marinelli beaker 0.5l (measurements are done
     in 1l Marinelli beaker
with a sample of 0.5l volume)

 

          134Cs

5...1·105 Bq/l (Bq/kg)

          137Cs

5...1·105 Bq/l (Bq/kg)

          40K

70...2·104 Bq/l (Bq/kg)

     Measurement geometry - Flat-type container 0.5l

 

          131I

20...4·105 Bq/l (Bq/kg)

          134Cs

20...4·105 Bq/l (Bq/kg)

          137Cs

20...4·105 Bq/l (Bq/kg)

          40K

200...2·104 Bq/l (Bq/kg)

     Measurement geometry - "Denta" container 0.1l

 

          131I

50...1·106 Bq/l (Bq/kg)

          134Cs

50...1·106 Bq/l (Bq/kg)

          137Cs

50...1·106 Bq/l (Bq/kg)

          40K

500...2·104 Bq/l (Bq/kg)

Intrinsic relative error of volume (specific) activity measurement

±20% max.

Typical resolution at 662 keV (137Cs)

8%

Measured sample density range

0.1...3 g/sm3

Minimum measured activity for 1-hour measurement with statistical error ±50% (P=0.95), max.

 

     Measurement geometry - Marinelli beaker, 1l

 

          131I

4 Bq/l (Bq/kg)

          134Cs

4 Bq/l (Bq/kg)

          137Cs

5.7 Bq/l (Bq/kg)

          40K

78 Bq/l (Bq/kg)

          226Ra

12 Bq/l (Bq/kg)

          232Th

10.4 Bq/l (Bq/kg)

     Measurement geometry - Marinelli beaker 0.5l

 

          134Cs

8 Bq/l (Bq/kg)

          137Cs

8 Bq/l (Bq/kg)

          40K

110 Bq/l (Bq/kg)

     Measurement geometry - Flat-type container, 0.5l

 

          131I

20 Bq/l (Bq/kg)

          134Cs

20 Bq/l (Bq/kg)

          137Cs

20 Bq/l (Bq/kg)

          40K

260 Bq/l (Bq/kg)

     Measurement geometry - "Denta" container, 0.1l

 

          131I

50 Bq/l (Bq/kg)

          134Cs

50 Bq/l (Bq/kg)

          137Cs

52 Bq/l (Bq/kg)

          40K

690 Bq/l (Bq/kg)

Energy range

50 keV...3 MeV

Number of ADC channels

1024

Integral nonlinearity

±1% max.

Intrinsic background for 137Cs window

<2 cps

Operation mode setup time

10 min

Continuous run time

≥24 h

Measurement instability during continuous service

≤3%

Operating temperature range

0°C...+40°C

Relative humidity with air temperature 30°C without condensation

75%

Overall dimensions, weight (without PC)

 

     Detection unit

ø97x350 mm, 2 kg

     Protection unit

ø600x700 mm, 125 kg

     USB-DU adapter

95x51x33 mm, 0.07 kg

Gamma Activity Monitor meets International standard requirements: IEC 61563:2001;

Safety standard requirements: IEC 61010-1:1990;

EMC requirements: EN 55022:1998+A1:2000+A2:2003, EN 55024:1998+A1:2001+A2:2003,

IEC 61000-4-2:2001, IEC 61000-4-3:2008, IEC 61000-4-4:2004, IEC 61000-4-11:2004

 
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