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BETA-1S

Scintillation beta spectrometer

 

Intended use

BETA-1S is designed to measure the specific activity of beta-emitting radionuclides in environmental samples.
The spectrometer allows solving such traditional tasks of spectrometric analysis as certification of food, animal feed, forestry products, radiation monitoring, monitoring of technological processes and radioactive contamination, etc.

 

 

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Description

Application

BETA-1S can be used in laboratory conditions for radiation monitoring of environmental objects and various products during their extraction, processing, and release.

 

Design and operation

BETA-1S is a UDS-B-USB scintillation digital beta detecting device placed inside the lead shield. The lead shield helps decrease gamma background influence and increase accuracy of activity measurement.
The investigated sample is prepared in accordance with the applied sample preparation method and is placed in a standard cuvette, leveled and compacted in it using the supplied sample compacting device. AFA filters can also be measured by the spectrometer.
BETA-1S comes with the Operator’s Workstation with the installed specialized software (SpectraLineBG) used to control data accumulation, display, data processing and to output results of data processing to external devices.

 

Features and functional capability

  •  Integrated gain stabilization system based on the LED reference peak ensures high stability of the detecting device, thus eliminating the need of daily energy calibration of the spectrometer
  • Non-potassium photomultiplier (PMT) used in the detecting device ensures obtaining low values of the minimum measured activity of radionuclides
  • The possibility of software, hardware and methodological coupling with the GAMMA-1S Scintillation Gamma Spectrometer
  • Wide range of functions to work with spectra and results of their processing: measurement with time exposure (live or real time), automatic accumulation and processing mode, visualization on the monitor screen, storage in database
  • Generation of protocols in accordance with regulations in force; reports are issued on the following product categories:
    • Food products
    • Forestry products
    • Feed and feed additives
  • Printing out of processing results and spectrum

Specifications and Performance

Range of detected beta energies

200 to 3000 KeV
Relative energy resolution for the 624 keV conversion electrons line (¹³⁷Cs)

15 % max
Range of specific activity measurement for ⁹⁰Sr: (The lower limit of the measured activity range (i.e. minimum measured activity) is given for the measurement time of 2 hours and error of 50 %, measurement geometry is a standard cuvette)

(30* to 1·10⁵) Bq/kg – excluding gamma path result
*Data is given for the raw material samples, i.e. raw materials without pre-treatment
(17 to 1·10⁵) Bq/kg – including gamma path result for ¹³⁷Cs and ⁴⁰K
Limits of tolerable basic relative error for activity measurement of ⁹⁰Sr radionuclide (Р = 0.95)

±(10 to 50) %
Operating mode setting time

30 minutes max
Continuous operation

24 hours min
Time instability over the period of continuous operation

±1 % max
Power supply

~220 V, (50 ± 1) Hz, 250 V•А
Operating conditions

10 to 35 °С
Operating geometry

Standard cuvette: Ø70×8 mm, volume is 30 ml, sample weight is up to 30 g
AFA filter: working surface is 20 см²
Overall dimensions

Ø300×467 mm (Ekran-1SB protective shield)
Ø91×290 mm (UDS-B-USB detecting device)
Weight

95 kg (Shield-1SB Protective shield)
1.3 kg (UDS-B-USB)

Certification

Certification

  • The BETA-1S spectrometer is registered in the State Register of Measuring Instruments under No. 15292-09
  • The BETA-1S spectrometer corresponds to the requirements to the products of 4Н safety class according to OPB-88/97
  • The BETA-1S spectrometer meets the Customs Union Technical Requirements “Safety of Low Voltage Equipment” (CU TR 004/2011) and “Electromagnetic Compatibility of Technical Means” (CU TR 020/2011)

 

Measurement procedure

  • Certification of the radiation control methods “Activity of radionuclides in investigated samples. Measurement procedure for beta spectrometers using the SpectraLine software” No. 42152.4B206/01.00294-2010
  • Certification of “Methods of measuring the volumetric activity of radionuclides 90Sr+90Y; 137Cs, 60Co, 54Mn, 133Ba, 88Y, 65Zn, 22Na in indoor air aerosols and beta radionuclides activity in samples of surface contamination acquired with the GAMMA-BETA-1S spectrometer”

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