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BETA-1S

Scintillation beta spectrometer.

 

Intended use

The BETA-1S Scintillation beta spectrometer 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. The spectrometer can also measure AFA filters.

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
  • 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 reports 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 registered beta energies

0.2 to 3 MeV
Relative energy resolution for 624 keV conversion electrons line (Cs-137)

15 % max
Range of measured specific activity for Sr-90 radionuclide

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

±(10 to 50) %
Time instability for continuous operation period

±1 % max
Operating mode setting time

30 minutes max
Continuous operation

24 hours min
Power supply

~220 V, (50 ± 1) Hz, 250 V·А
Environmental

+10 to +35 °С, 75 % at +30 °С and lower temperatures without moisture condensation
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
Dimensions

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

95 kg (Ekran-1SB protective shield)
1.3 kg (UDS-B-USB)

Certification

Certification

  • BETA-1S is registered in the State Register of Measuring Instruments under No. 15292-09
  • BETA-1S corresponds to the requirements to the products of 4Н safety class according to OPB-88/97
  • BETA-1S complies with the requirements of the Technical Regulations of the Customs Union on safety of low voltage equipment (TR CU 004/2011), Technical Regulations of the Customs Union on electromagnetic compatibility of technical means (TR CU 020/2011)

Measurement procedure

  • Activity of radionuclides in investigated samples. Measurement procedure for beta spectrometers using the SpectraLine software. Number in the Federal Information Fund for Ensuring the Uniformity of Measurements is ФР.1.40.2014.18317
  • Procedure for measuring the volumetric total activity of beta-emitting radionuclides in samples of aqueous technological media of nuclear power plants and in liquid radioactive waste using BETA-1S spectrometers. Number in the Federal Information Fund for Ensuring the Uniformity of Measurements is ФР.1.40.2018.30106. Additional software is required for work with this procedure (Spectran-Beta)

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