Aspect SPC
About the companyServicesContactsCertificates News     russian  
-Products-
Radiation Monitors and Systems
Dosimetry and radiometry
Nuclear radiation detectors
PC-based MCA
Modular nuclear electronics
Nuclear radiation spectrometers
Inspection systems
Shielding screens
Dedicated equipment
Software

radioactive waste inventory system SKG-02
active-well coincidence counter SNS-01A
active-well coincidence counter SNS-02A

To main page / Inspection systems

ACTIVE-WELL COINCIDENCE COUNTER SNS-02A

PURPOSE
Determination of the amount of fissile materials (uranium and plutonium isotopes) in various samples and products using nondestructive analysis (without opening the casing or packing).

SNS - 02А. Increase of image

APPLICATION
Measurement of the concentration of nuclear materials in products and waste; inventory use at facilities where nuclear materials are produced, used, or stored.

OPERATION
The counter operation is based on measurement of the intensity and analysis of time correlations of the neutron radiation from samples placed in the measuring chamber surrounded with highly efficient proportional neutron counters.
Counter control, data acquisition, and processing of results are carried out remotely with the computer connected to the counter through an electronic module.
There are four operation modes:

  • Passive mode of counting the total number of neutrons emitted by the sample, which provides the highest sensitivity in measurement of spontaneously fissioning isotopes.
  • Passive mode of counting coincidence multiplicity in a given time window, which allows discrimination between neutrons from spontaneous fission and neutron from the (α,η) reaction.
  • Active mode of counting multiplicity of spontaneous fission neutron coincidences in bombardment of samples with thermal neutrons from an external neutron source, which is used to determine the U -235 content of low-enriched uranium.
  • Active mode of counting coincidence multiplicity in bombardment of samples with fast neutrons from an external neutron source, which is used to determine the U -235 content of highly enriched uranium.

TECHNICAL DATA

Measuring chamber dimensions, mm
diameter
200
height
200
Fission neutron detection efficiency, %
25
Maximum detectable coincidence multiplicity
16
Sensitivity to Pu -240 in passive mode of total counting, mg
1
Sensitivity to U -235 in active mode with thermal neutrons, g
1
Power supply, V
220
Overall dimensions, mm
1000 x 700 x 700
Weight, kg
150

Print version

site map e-mail developed by cre8 bureau