Segmented gamma spectrometric monitor for the activity assay of radioactive waste in standard 200-litre drums.
The system comprises the monitor itself, a transfer system for moving the measuring part to and from the drum, two dose rate monitors, a rotary table, and a control and power supply switchboard.
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| Energy range | 100 keV to 1500 keV (resolution > 2 keV at 1332 keV) |
|---|---|
| Radionuclides measured | Cs-134, Cs-137, Co-60, Mn-54, Fe-59, Nb-95, Zn-65, Zr-95, Co-58, Cr-51, Ce-144, Hf-181, Ru-103 and others |
| Measuring range | From 2.5 kBq up to 1 GBq (Co-60 in a 0.2 m³ drum, density 300 kg/m³, background 300 nSv/h, 30 min) |
| Measurement precision | ±20 % for uniform activity distribution and density; maximum 50 % for density 1000 kg/m³ |
| Detector | HPGe and/or scintillator (NaI, SrI, LaBr, etc.) |
| Material volume | Up to 0.2 m³ |
| Material weight | Up to 700 kg (maximum drum weight) |
| Power supply | 220 V +22/−33 V, 50 Hz, 2 kW; TN-S power supply system |
Source: Baltic Scientific Instruments, Waste Assay Monitor HERCULES brochure (bsi.lv, retrieved November 2026). Full specifications are available in the documents.
