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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
