| Issue |
EPJ Web Conf.
Volume 323, 2025
22nd International Metrology Congress (CIM2025)
|
|
|---|---|---|
| Article Number | 11001 | |
| Number of page(s) | 5 | |
| Section | Radionuclide, Dosimetry & Spectroscopy | |
| DOI | https://doi.org/10.1051/epjconf/202532311001 | |
| Published online | 07 April 2025 | |
https://doi.org/10.1051/epjconf/202532311001
Low background facility for ionizing radiation at LNE LNHB: Design and traceability
Université Paris-Saclay, CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), F-91120, Palaiseau, France
* Corresponding author: Jean-marc.bordy@cea.fr
Published online: 7 April 2025
This paper presents the set up of a low background calibration facility aimed at calibrating environment survey meter. The facility is a lead box 100 cm x 100 cm x 125 cm with 2.5 cm thickness walls, the Caesium 137 source is located in a conical collimator including an internal cavity for the source. The ambient dose equivalent rate in the beam of this facility varies between 300 and 80 nSv/h. This quantity is traceable to the air kerma national references of LNE-LNHB. The standard uncertainty for the ambient dose equivalent rate is about 2% and the uncertainty of the calibration coefficient od a survey meter, depending meanly on the uncertainty if the background measure, is estimated between 5% and 10%.
© The Authors, published by EDP Sciences, 2025
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