Function:
measurement of volumetric activity of alpha- and beta-emitting radionuclides contained in aerosol form in air, in coupled and disposed mode.
Application:
continuous automated monitoring of radioactive aerosols concentration in off-line mode or as part of automated radiation monitoring systems in air:
- Ventilation systems;
- Working premises
Technical characteristics
| Detector type | Silicone spectrometric |
| Detector number | 2 |
| Measurement range, Bq/m3 Alpha-emitters volumetric activity Coupled mode Divided mode Beta-emitters volumetric activity Coupled mode Divided mode |
2.6*10-2-2*105 1.8*10-3-2*105
2 – 2*105 |
| Limit of fractional error when measuring aerosols 90S+90Y volumetric activity in the air with confidence probability 0,95 | 50% |
| Registry energy range, MeV Alpha particles Beta particles |
3.0-8.0 0.1-3.0 |
| Volume air-flow through the filter | Not less than 20 l/min |
| Air-flow measurement error | ±10% |
| Working temperature range 0C | From -5 to +50 |
| Dimensions, mm | 498x273x212 |
| Power supply | Net 220W, 50 Hz |
| Power supply | Net 220W, 50 Hz |
| Filtering belt type | LFS2-50 |
Unit provides the performance of the following functions:
- Measurement of average values of beta- and alpha-emitting radionuclides volumetric activity in the air with predetermined period of shot change of the filtering belt (LFS2-50) (shot change is made in case of dust or activity accumulation)
- Verification of detection unit on external devices signal and automated updating of spectrometric circuit parameters through internal source
- Estimated measurement of current volumetric activity
- Signalization when average volumetric activity exceeds programmed constraint
- Constant measurement of volume air-flow through the filter and evaluation of total volume of sample
- Self-diagnostic and performance monitoring
- Transition of measurement results through two channels with RS-485 interface and one channel with RS-232 interface