Bild: ELSE NUCLEAR
Automated segmented gamma scanning of waste drums
Automated segmented gamma scanning system that characterises drums filled with radioactive waste. The drum is centred and weighed on a rotating platform, and collimated detectors – typically HPGe – move vertically to measure preset sub-sections. Efficiency is pre-calculated with Monte Carlo simulations from the set-up and the density of the drum content; the layout is adapted to the customer’s needs.
Download product sheet (PDF)All values with references – for tender documents
Specifications checked against the manufacturer’s documents on 2026-10-17
The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.
| Detector type | Typically a collimated high-efficiency HPGe detector with MCA on a vertically moving shelf; can be combined with GM tubes (fast dose rate), large plastic scintillators (pre-scan) or NaI(Tl) instead of HPGe2 |
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| Energy resolution at 1.33 MeV | HPGe: ≤2.3 keV FWHM for ⁶⁰Co (1332.5 keV)2 |
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| Relative efficiency | 15–150% (nitrogen-cooled), 50–150% (electro-cooled)2 |
| Energy range | HPGe: 30 keV–7 MeV2 |
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| Cooling | Electro-cooling or liquid nitrogen2 |
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| Software | Efficiency pre-calculated with Monte Carlo simulations from the set-up and the density of the drum content; the report may include correlated isotope concentrations and possible hot-spot locations2 |
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| Drum size | Drums up to 500 L and 2,500 kg, density up to 2 g/cm³1 |
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| Weight | Typical: conveyors 250 kg each, central platform 1,000 kg, detector frame 1,000 kg, electric axes 230 kg each, switchboard 200 kg2 |
| Configurations | HPGe/L-D (2 + 2 conveyors and density measurement with a ²²Na source), HPGe/U (U-shaped array for up to 8 drums), HPGe-GM (one HPGe with GM fast scan) and HPGe-2G (two HPGe in 90° geometry)2 |
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| Use | Automated segmented gamma scanning to characterise drums filled with radioactive waste1 |
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| Scale | Weighing station max. payload 2,500 kg, precision ±2.5 kg2 |
| Measurement sequence | The drum is centred and weighed on a rotating platform; detectors move vertically and scan preset sub-sections through a collimator; the measurement set-up is selected automatically by activity level1 |
| Control | Local PLC and operator panel; the software runs the work cycle and checks the system status1 |
The data comes from the manufacturer’s published documents. Manufacturers may change specifications; the current configuration and performance are confirmed in the quotation.
The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.
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Portal monitor for excavation materials in boxes and containers
We help you choose the right configuration, detector and accessories for your measurement task.
ELSE NUCLEAR