ГЭТ 6-2016 (НИО 210)
Standard name:
- ГЭТ 6-2016 State primary standard of units of radionuclide activity, specific activity of radionuclides, flux of alpha, beta particles and photons of radionuclide sources.
Type of measurement:
- Measurement of characteristics of ionizing radiation and nuclear constants
Structural division: name НИО\НИЛ:
- Research Department for Measurements of Ionizing Radiation
Guardian Scientist:
- Alekseev Ilya Vladimirovich
Year of creation:
- 2016
Year of re-confirmation:
- 2016
Operating principle:
Absolute methods for reproducing the unit of activity of radionuclides, applied depending on the type of radionuclide decay and the range of radionuclide activity:
- 4 (2)π particle counting methods;
- Definite solid angle methods;
- Coincidence methods;
- Calorimetric method;
- Ionization chamber method.
Composition of the standard:
The operation of the standard is ensured by a set of standard installations included in its composition:
- UEAP-1 with a beta counter for reproducing units of radionuclide activity and beta particle flux using the 2π(4π)β-counting method;
- UEAPP-2 with alpha counters for reproducing units of radionuclide activity and alpha particle flux using the 2πα-counting method and a specific solid angle;
- UEA-3 with alpha, beta, gamma, and X-ray radiation counters for reproducing units of radionuclide activity using the 4π α(β)-γ coincidence and QX-γ coincidence methods;
- UEA-4 with a spherical ionization chamber for reproducing the unit of activity of radionuclides;
- UEA-5 based on a calorimeter for reproducing the unit of activity of photon radiation radionuclides;
- UEA-6 with a liquid scintillator, for reproducing the units of activity of radionuclides using the double and triple coincidence ratio counting method in a liquid scintillator (TDCR method)
- UEA-7 with a scintillation detection unit for reproducing the unit of activity using the 4πγ-counting method
- A set of beta radiation sources based on 90Sr+90Y CO radionuclides
- Scales for measuring the mass of a radionuclide solution
Main metrological characteristics
| Measurement range | Radionuclide activity: 10 – 5 x 1012 Bq |
|---|---|
| Specific activity of radionuclides: 1 x 102 – 1 x 106 Bq g-1> | |
| Alpha, beta particle, and photon flux: 5 – 5 x 104 particles s-1, photons s-1> | |
| Relative expanded uncertainty at coverage factor k=2 | Activities: 1.2 x 10-3 – 4.6 x 10-2 |
| Specific activity: 1.2 x 10-3 – 3.5 x 10-2 | |
| Alpha and beta particle flux: 6 x 10-3 – 7.2 x 10-3 | |
| Flux photons: 1.4 x 10-3 – 3.4 x 10-2 |
Verification diagram:
- Heads the state verification scheme for measuring instruments for radionuclide activity, specific activity of radionuclides, flux and flux density of alpha, beta particles and photons of radionuclide sources
Scope of application:
Radionuclide production in the country;
- Medicine: radiology, radiotherapy;
- Environmental monitoring;
- Nuclear energy safety;
- Food and quarry material monitoring;
- Recycling and disposal of man-made waste and formations;
Results of applying the standard:
Not specified
The total number of measuring instruments traceable to ГЭТ 6-2016:
The park of SI, traceable to the standard, is hundreds of thousands.
Ensuring the uniformity of measurements, participation in the CIPM MRA program:
124
PHOTO:
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