Automatic monitoring of gamma-ray radionuclide specific activity directly in water reservoirs in the regions of nuclear weapons testing, near nuclear storage, nuclear power plants and other objects of nuclear energetics.
| Parameter | Value | 
|---|---|
| Energy range, keV | 50 - 3500 | 
| HPGe detector efficiency, % | 38 * | 
| Energy resolution for 30% efficiency detector, keV at energy     122 keV 1.33 MeV  | 1.0 1.9  | 
| Detection limit for Cs137 radionuclide specific activity, measurement time 1 hour, Bq/m3 | 200 | 
| Cs137 radionuclide specific activity measurement error for measurement time 1 hour, % | < 30 | 
| Integral nonlinearity, % | < 0.05 | 
| Instability of specific activity measurement from calibration source, % | 10 | 
| Time of operation mode setting, h | < 0.5 | 
| Time of continuous operation without prevention, days | 30 |