Search Dosimeter-Radiometer

MKS-11GN SPECTRA SPRD

NSN 6665 61 016 9200

ТУ У 33.2-22362867-058:2021

SPRD SPECTRA intended to detect, localize and identify radioactive and nuclear materials by their gamma and neutron radiation as well as the amplitude gamma spectra. The device identifies radionuclides with indication of the category that they belong to (in compliance with the IAEA requirements). It is used to prevent illicit transfer of these materials across the state borders, as well as at the companies and institutions dealing with gamma and neutron radiation sources.

Available in two colours: yellow and olive green (NATO green). Upon customer’s request we can produce SPECTRA in only gamma version (without neutron channel).

Complies with the ANSI 42.48 & ANSI 42.32, ANSI 42.33.

Operating Manual

Features

High sensitivity CsI(Tl) scintillation detectors of gamma and LiI(Eu) of neutron radiation with solid state (silicon) photomultiplier
Color display with high resolution
Storage and transfer of 250 complete gamma radiation spectra
Powerful CPU and improved algorithms for spectra processing
New software for detailed laboratory research and spectra processing
No “microphone effect”
High thermal stability
Powered by built-in lithium polymer storage batteries that can be charged via USB cable
The dosimeter communicates with a PC via USB port
Real-time identification of spectra
Identification of radionuclides with specification of the categories they belong to (in compliance with IAEA requirements):
- medical radionuclides: ¹⁸F, ⁶⁷Ga, ⁵¹Cr, ⁷⁵Se, ⁸⁹Sr, ⁹⁹Mo, ⁹⁹mTc, ¹⁰³Pd, ¹¹¹In, ¹²³I, ¹²⁵I, ¹³¹I, ¹⁵³Sm, ²⁰¹Tl, ¹³³Хе
- industrial radionuclides: ⁵⁷Co, ⁶⁰Co, ¹³³Ba, ¹³⁷Cs, ¹⁹²Ir, ¹⁵²Eu, ²²Na, ²⁴¹Am
- special nuclear materials: ²³³U, ²³⁵U, ²³⁷Np, Pu [[Reactor grade plutonium (more than 6% ²⁴⁰Pu)]
- naturally occurring radioactive materials: ⁴⁰K, ¹³⁸La, ²²⁶Ra, ²³²Th-decay series, ²³⁸U-decay series
  Note: The list of nuclides the device is able to identify may be extended if needed

Threshold alarm system with four independent threshold levels:
- search threshold level (threshold level of count rate from the detector photon and neutron ionizing radiation)
- safety threshold level (threshold level of photon ionizing radiation DER)
- accumulated dose threshold level
Light color alarm (indication) of threshold levels exceeding (gamma radiation – red color, neutron – blue) and visual alarm on the side of the device
Software is used for:
- reading measurement results and critical events from the dosimeter memory into the PC
- report preparation and printout
- display of the obtained dosimetric information with the GPS coordinates on the area map
- display of the accumulated spectra

Purpose Of Use

Identification of the radionuclides type by their amplitude gamma spectra
Determination of gamma and neutron radiation intensity
Measurement of ambient dose equivalent rate (DER) of gamma and X-ray radiation (photon-ionizing radiation)

Delivery Kit

search dosimeter-radiometer
charger
shielded USB cable
software
operating manual
packing case
sample 232Th (for detector age compensation)

Specifications

Photon-ionizing radiation sensitivity of (¹³⁷Cs) CsI(Tl) scintillation detector

400 cps/(µSv/h)

Upon customer’s request the sensitivity can be changed to a value of not less

200 cps/(µSv/h)

Neutron radiation sensitivity while using the LiI(Eu) scintillation detector

for thermal neutrons, not less

1.2 ± 0.12 pulse·cm²/n

for fast neutrons, not less

0.12 ± 0.012 pulse·cm²/n

Total measurement and display range of photon-ionizing DER

0.01 … 10⁶ μSv/h

from built-in scintillation detecting unit of photon-ionizing radiation

0.1 … 50 μSv/h

from built-in Geiger-Muller counter

50 … 10⁶ μSv/h

Measurement and display range of photon-ionizing DE from the Geiger-Muller counter

0.1 … 9.9·10⁶ μSv

Display range of count rate of photon-ionizing radiation

0.01 … 25 000 cps

Display range of neutron radiation DER

0.01 … 10⁴ μSv/h

Display range of pulse count rate of neutron radiation from the scintillation neutron detecting unit

0.01 … 19 000 cps

Main relative permissible error limit when measuring photon-ionizing radiation DER from the scintillation detecting unit of photon-ionizing radiation at 0.95 confidence probability (¹³⁷Cs), where H*(10) is a dimensionless value numerically equal to value of DER measured in μSv/h

(15+1/H*(10)) %

Main relative permissible error limit when measuring photon-ionizing radiation DER and DE from the Geiger-Muller counter at 0.95 confidence probability (¹³⁷Cs)

15 %

Energy range of detected photon-ionizing radiation

0.02 … 3 MeV

Energy dependence of the device’s readings when measuring photon-ionizing radiation DER in the energy range from 0.05 MeV to 1.25 MeV relative to 0.662 MeV energy (¹³⁷Cs)

±25 %

Resolution of scintillation detecting unit of photon-ionizing radiation for 137Cs, not more

8 %

Energy range of detected neutron radiation

2.5·10^-8 … 14 MeV

Set-up time of the device operation, not more

1 min

Calibration time by the level of gamma background

2 … 90 s

Response time to over 10 times change of photon-ionizing radiation DER

0.25 s

Operating supply voltage

3.7 V

Time of continuous operation of the device when powered from the charged lithium-polymer battery under background of gamma radiation not more than 0.5 μSv/h

- a switched-off display backlight, with no alarm triggering and a switched-off GPS receiver, not less

200 hrs

- a switched-off display backlight, with no alarm triggering and a switched-on GPS receiver, not less

50 hrs

Operating temperature range

-20 … +50 °С

Dimensions of the device without a clip (with a clip), not more

69 × 128 × 45 mm

Weight of the device, not more

0.32 kg