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Helicopter- and car-borne radioactivity mapping |
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 Radiological diagnosis of the ground |
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In just a few hours, the Hélinuc® helicopter-borne γ mapping system can produce a radiological diagnosis of an area between tens and hundreds of square kilometers. Hélinuc® has the capability to identify radionuclides with a sensitivity ranging from the natural radioactivity level to that of a severe accident situation. |
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Main missions |
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Defense |
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Intervention in the event of an incident or accident, |
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Systematic mapping of nuclear facilities, |
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Taking part in national and international exercises. |
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Hélinuc System®:
on-board γ detector in a box under the helicopter. |
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Simultaneous acquisition of a γ spectrum and the helicopter's position. |
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Automated intervention in the event of an accident for the "Intra" economic interest group |
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Practice interventions and interventions in the event of an incident or accident, |
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Systematic mapping of nuclear sites:
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EDF : nuclear electric power plants, |
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CEA : research centers, |
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Orano : nuclear plants. |
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International |
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IAEA
| Radionuclides |
NaI detector |
GeHP detector
(2 second) |
GeHP detector
(60 second) |
| 137Cs (kBq/m²) |
1 |
6,5 |
0,5 |
| 154Eu (kBq/m²) |
2 |
10 |
1 |
| 40K (Bq/kg) |
30 |
620 |
10 |
| 238U (Bq/kg) |
10 |
260 |
20 |
| 232Th (Bq/kg) |
3 |
130 |
13 |
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Detection limits (1σ, 40m altitude) |
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Autonuc |
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Like the helicopter-borne γ mapping system, a car-borne system is particularly useful for tracking lost sources, particularly since Autonuc measurements are more sensitive than Hélinuc ones.
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γ detector located at the rear of the vehicle. |
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In
situ |
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In addition, in situ measurements are also used periodically to confirm activities in a given location.
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In situ γ measurement at a given point. |
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