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Devices of radiation and
technological control

Spectrometer of beta, gamma radiation SES-ТЕ-001m

Purpose and principle of operation

A spectrometer is aimed to measure of activity of beta-, gamma-emitting radionuclides in countable samples in the countable samples which has been obtained from the food samples, building material, environment, biological objects and etc.

Application field

Сhe spectrometer is applied as a stationary measurement device in the laboratories for radiological control for the measurement of radionuclide activity in the test samples if there are the appropriate methodologies for measuring which has been certified in accordance with the established procedure.

Features

A detector of beta-channel connects to a detector of gamma-channel with an internal dual-ported AD converter. The detector of gamma-channel connects to a USB input of personal computer. A quantity of channels in each port is 1024.

The spectrometer satisfies the requirements of electromagnetic compatibility according to: EN 55022:2017; EN 61000-4-2:2009; EN 61000-4-3:2006/A2; EN 61000-4-4:2012; EN 61000-4-5:2014/A1:2017; EN 61000-4-6:2014/AC:2015; EN 61000-4-8:2017; EN 61000-4-11:2014/A1:2017.

Application conditions:

ambient temperature from + 10 to + 40°С;
atmospheric pressure from 84 to 106,7 kPa;
upper value of relative humidity 75% at 30°С and at lower temperature with water condensation;
ambient background of gamma-radiation is no more 0,15 µSv/h.

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Spectrometer of beta, gamma radiation SES-ТЕ-001m (369 Кб)

Main technical characteristics

Detectors type:
- beta channel — scintillation plastic	Ø70x10 mm
- gamma channel — scintillation counter NaI(Tl)	Ø63x63 mm
- full width at half maximum according to Cs-137 (662 keV)	8%
Energy detection range:
- beta radiation	200 keV...2400 keV
- gamma radiation	100 keV...3000 keV
Minimum measured activity:
- in the countable sample with density 1 g/cm³ in geometry «15 cm³» during measurement time 3600 s (at radiation background is not more 0,15 µSv/h) for P = 0,95:
- as per Sr-90 - no more	0,5 Bq/sample
- as per Cs-137 - no more	1,6 Bq/sample
- as per K-40 - no more	0,9 Bq/sample
- in the countable sample with density 1 g/cm³ in geometry «Marinelli 1 l» during measurement time 3600 s (at radiation background is not more 0,15 µSv/h) for Р = 0,95:
- as per K-40 - no more	40 Bq
- as per Ra-226 - no more	4 Bq
- as per Th-232 - no more	3 Bq
- as per Cs-137 - no more	3 Bq
Limits of the permissible basic relative error of radionuclide activity measurement for volumetric geometry (Р = 0,95) is not more	± 30 %
Integral nonlinearity of measuring path is not more	1 %
Instability of calibration characteristics for 8 hours of continuous work less than	± 0,5 %
Maximum statistical input load	10⁴ s^-1
Warm-up time of spectrometer, no more	30 min
Uptime of spectrometer, no more	24 h
Power supply of printer and PC of spectrometer is provided from a single-phase alternating current network with voltage and frequency
- voltage	from 187 to 242 V
- frequency	from 49 to 51 Hz
Consumption capacity, no more	250 VA
Mean time between failures of spectrometer, no more	20000 h
Average service life of spectrometer, no more	10 years
Dimensions and weight of component parts of spectrometer, no more:
- radiation detector of beta-channel	Ø87x250 mm
- lead shielding of beta-channel	220x180x173 mm
- total weight of beta-channel	45 kg
- radiation detector of gamma-channel	Ø87x435 mm
- lead shielding of gamma-channel	370x574x710 mm
- total weight of gamma-channel	125 kg
Protection degree of radiation detectors of beta- and gamma-channels	not worse IP54

Purpose indicators:

According to the impact on the safety of nuclear power plants the spectrometer belongs to the elements of normal operation, which do not affect the NPP safety (according to NP 306.2.141 safety class 4Н, according to NP 306.2.202 safety class 4).
According to a noise immunity according to SOU NAEK 100, the spectrometer belongs to the group of execution of technical equipment of nuclear power plants designed to operate in an electromagnetic environment of mild severity.

Delivery set

Standard:	On request:
- a gamma radiation detector with a connection cable USB PX0840/B;	- a beta radiation detector with a connection cable;
- a lead shielding of gamma-channel ЗСГ-01;	- a lead shielding of beta-channel ЗСБ-01;
- the Marinelli vessels 3...5 pcs;	- a device for forming samples;
- a control sample with a passport;	- a measuring cuvette 3...5 pcs;
- a personal computer with licensed Windows 10 installed;	- a control sample with a passport;
- a printer А4;	- the appropriate methodologies for measuring which has been certified in accordance with the established procedure.
- a mains filter-extension;
- SpectraLineBG. Software with individual access key and necessary drivers;
- a product status record;
- an operation manual;
- SpectraLineBG1.6. Description of the main functions. User's manual;
- the appropriate methodologies for measuring which has been certified in accordance with the established procedure.

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