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PURPOSE
Measurement of specific activity of gamma-, beta-emitting radionuclides
APPLICATION
- At radiation control laboratories: measurement of count samples (filters,
smears), with subsequent identification of radionuclide composition, calculation
of total volumetric activity of aerosols in the air of NPP areas and partial
radionuclide contribution to total volumetric activity of aerosols, and determination
of beta flux density. Data from the Gamma-Beta-1S spectrometer are stored
in the data base and can be used for calculation of radiation doses to the
personnel during the work at NPPs
- At radiochemical laboratories to perform radiochemical control of aqueous technological environment of NPPs:
- measurement of total volumetric activity of beta-emitting radionuclides
- measurement of total volumetric activity of iodine
- measurement of volumetric activity of reference radionuclides (rapid chromatographic radiochemical analysis)
- At laboratories of external radiation control departments of NPPs and factories for controlling environmental objects, at laboratories of the State Sanitary and
Epidemiological Inspection
COMPONENTS
- Plastic-scintillator detecting unit BDS-B with a built-in amplifier, high-voltage power supply,
and an independent system of stabilization by the LED reference peak (plastic scintillator of size dia.70x7 mm)
- 63x63 single-crystal NaI(Tl) scintillator detecting unit BDS-G with a built-in amplifier,
a high-voltage converter, a system for stabilization by the LED reference peak and temperature compensation of the conversion
characteristic
- Spectrometric amplitude-to-digital converter circuit board ADC-1К-W2,
IBM PC standard, with a buffer memory, a live/real timer, and a PCI interface bus
- Lead protection screens "Ekran-1SG" and "Ekran-1SB"
- IBM PC type personal computer with a printer
- Applied software for Windows (depending on the purpose of the spectrometer,
one of two packages is installed):
- LSRM
- GAMBIT
FEATURES
- Measurement of spectra with live-time and real-time exposures
- Energy, peak-shape, detection-efficiency, and sensitivity calibration
- Automatic collection and processing of spectra, including identification
of radionuclides, and saving of the spectra and their processing results on
any information carriers
- Visualization of spectra and processing results on the monitor screen
- Printing of the spectrum and its processing results
TECHNICAL DATA
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Gamma-1S |
Beta-1S |
| Detectable energies, MeV |
0,05 – 3 |
0,1– 3 |
| Relative energy resolution for the peak, % |
8 (for 661 keV Cs-137) |
15 (for 624 keV Cs-137) |
| Numbers of channels |
1024 |
| Maximum statistical input intensity, pulse/s |
50000 |
| Integral nonlinearity, % |
±1 |
| Time instability, % |
1 |
| Operating temperature, °С |
10...35 |
Power consumption, ac 220 V, 50 Hz, W
|
250 |
SOFTWARE
Lsrm2000DB software
CERTIFICATES
- The Gamma-1S is enrolled in the State Register of Measuring Devices under
№ 15294-96 of 14.03.2002
- The Beta-1S is enrolled in the State Register of Measuring Devices under
№ 15292-96 of 14.03.2002
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