The Nuclear Calibration Laboratory at the Belgian Nuclear Research Centre disposes of several radioactive sources for the calibration of a wide range of nuclear equipment, from personal dosimeters to survey monitors. The available sources can also be used when very precise dose/dose rate irradiations are needed for research purposes. The laboratory is accredited by the Belgian Accreditation Organisation (BELAC) for its gamma and neutron calibration methods.
In our laboratory in Ghent (LNK Ghent) we perform calibrations of ionisation chambers for radiotherapy and radiology departments of hospitals.
For the calibration of neutron monitors and devices sensitive to gamma, X- or beta rays, our laboratory has:
All sources are traceable to primary standards.
Calibrations are preferably performed when an appointment is made well in advance. This way, all equipment needs to be at our disposal for maximum 1 week. The activities of the laboratory for nuclear calibrations are related to the irradiation services.
Contacts
Head of laboratory: Mihailescu Cristian
Operators: Marlein Bart, Melis Ludo
Head of Expert Group: Vanhavere Filip
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Method: calibration using 252Cf neutron sources |
| Quality | Range (2009-09-01) | Accuracy (2 sigma) |
| Neutron fluence rate | Up to 4.3E+03 n/cm2s | 7.0 % |
| H*(10) (ICRP 74) | Up to 6 mSv/h | 8.0 % |
| Hp(10) (ICRP 74) | Up to 6 mSv/h | 8.0 % |
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Method: calibration using 60Co (4 sources) and 137Cs (4 sources) in the horizontal beam installation
Device: all types of gamma monitors, dosimeters, detectors
Validation report: MT.RDC.1013
Standard: calibration in accordance with ISO 4037-1, 4037-2 and 4037-3
The calibration method is certified by the Belgian Accreditation Organisation (Belac).
60Co
| Quality | Range (2009-09-01) | Accuracy (2 sigma) |
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| Air Kerma Ka rate |
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| H*(10) | Ka * 1.16 [Sv/h] | Uncertainty Ka + 4.0 % (square sum) |
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| Hp(10) | Ka * 1.15 [Sv/h] | Uncertainty Ka + 4.0 % (square sum |
137Cs
| Quality | Range (2009-09-01) | Accuracy (2 sigma) |
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| Air Kerma Ka rate |
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| H*(10) | Ka * 1.20 [Sv/h] | Uncertainty Ka + 4.0% (square sum) |
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| Hp(10) | Ka * 1.21 [Sv/h] | Uncertainty Ka + 4.0% (square sum) |
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Method: calibration using the 60Co source in the vertical beam installation |
| Quality | Range (2009-09-01) | Accuracy (2 sigma) |
| Air Kerma Ka rate | 1.8 Gy/h to 0.5 mGy/h | 4.0 % |
| H*(10) | Ka * 1.16 [Sv/h] | Uncertainty Ka + 2.0% |
| Hp(10) | Ka * 1.15 [Sv/h] | Uncertainty Ka + 2.0% |
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Method: calibration using 60Co and 137Cs in the panoramic beam installation |
60Co
| Quality | Range (2010-04-01) | Accuracy (2 sigma) |
| Air Kerma Ka rate | 2.2 mGy/h to 53 mGy/h | 5.0 % |
| H*(10) | Ka * 1.16 [Sv/h] | Uncertainty Ka + 2.0% (square sum) |
| Hp(10) | Ka * 1.15 [Sv/h] | Uncertainty Ka + 2.0% (square sum) |
137Cs
| Quality | Range (2008-01-01) | Accuracy (2 sigma) |
| Air Kerma Ka rate | 17 mGy/h to 377 mGy/h | 5.0 % |
| H*(10) | Ka * 1.20 [Sv/h] | Uncertainty Ka + 2.0% (square sum) |
| Hp(10) | Ka * 1.21 [Sv/h] | Uncertainty Ka + 2.0% (square sum) |
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Type MK2.2
| Quality | Range (2004-11-27) | Accuracy (2 sigma) |
| Personal dose equivalent Hp(10), 241Am | 60 μSv to 1000 μSv | 12.0 % |
| Personal dose equivalent Hp(0,07), 36Ci | 100 μSv to 2 mSv | 21.0 % |
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Method: calibration using X-rays, 16 keV - 250 keV |