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Experimental facility for the production of reference atmosphere of radioactive gases (Rn, Xe, Kr, and H isotopes).
Appl Radiat Isot 2019; 155:108934AR

Abstract

Radioactive gases are of great interest for environmental measurements and can be distinguished in two categories. The natural radionuclides such as the isotopes of radon (222Rn and 220Rn), and the anthropogenic radionuclides coming from fission products (isotopes of Xe and 85Kr) and activation products (3H and 37Ar). Gas monitoring in the environment is an important issue for radioprotection and for the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which both require metrological traceability of these gases. For this purpose, two gas chambers, of 42 L and 125 L, have been conceived and built at the LNE-LNHB to produce reference atmospheres of various gas mixtures. These chambers were created in order to provide any radioactive gas atmosphere with a wide range of activity concentrations (Bq·m-3 to MBq·m-3). The goal of this setup is to be representative of the different environmental conditions for detector qualification and to perform studies of radioactive gas absorption in materials of interest. As a result, the 2 chambers used in this experimental facility are designed to work from vacuum pressure to atmospheric pressure, with a constant activity concentration for any radioactive gas, and under dry to high humidity conditions. It can also be used in a static mode, in which the activity concentration will follow the radioactive decay of the gas. In this paper, the characterization of the chambers will be discussed. These two chambers are combined with different primary standards established by the LNE-LNHB. As the production of the reference atmosphere depends on the primary standard method, we present the details for each atmosphere production, which require a well-known volume, pressure or a direct activity concentration measurement.

Authors+Show Affiliations

CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), 91191, Gif-sur-Yvette Cedex, France. Electronic address: benoit.sabot@cea.fr.CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), 91191, Gif-sur-Yvette Cedex, France.CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), 91191, Gif-sur-Yvette Cedex, France.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31629295

Citation

Sabot, B, et al. "Experimental Facility for the Production of Reference Atmosphere of Radioactive Gases (Rn, Xe, Kr, and H Isotopes)." Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine, vol. 155, 2019, p. 108934.
Sabot B, Rodrigues M, Pierre S. Experimental facility for the production of reference atmosphere of radioactive gases (Rn, Xe, Kr, and H isotopes). Appl Radiat Isot. 2019;155:108934.
Sabot, B., Rodrigues, M., & Pierre, S. (2019). Experimental facility for the production of reference atmosphere of radioactive gases (Rn, Xe, Kr, and H isotopes). Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine, 155, p. 108934. doi:10.1016/j.apradiso.2019.108934.
Sabot B, Rodrigues M, Pierre S. Experimental Facility for the Production of Reference Atmosphere of Radioactive Gases (Rn, Xe, Kr, and H Isotopes). Appl Radiat Isot. 2019 Oct 10;155:108934. PubMed PMID: 31629295.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Experimental facility for the production of reference atmosphere of radioactive gases (Rn, Xe, Kr, and H isotopes). AU - Sabot,B, AU - Rodrigues,M, AU - Pierre,S, Y1 - 2019/10/10/ PY - 2019/04/23/received PY - 2019/10/07/revised PY - 2019/10/09/accepted PY - 2019/10/20/pubmed PY - 2019/10/20/medline PY - 2019/10/20/entrez KW - Krypton KW - Metrology KW - Radioactive gas KW - Radon KW - Tritium KW - Xenon SP - 108934 EP - 108934 JF - Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine JO - Appl Radiat Isot VL - 155 N2 - Radioactive gases are of great interest for environmental measurements and can be distinguished in two categories. The natural radionuclides such as the isotopes of radon (222Rn and 220Rn), and the anthropogenic radionuclides coming from fission products (isotopes of Xe and 85Kr) and activation products (3H and 37Ar). Gas monitoring in the environment is an important issue for radioprotection and for the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which both require metrological traceability of these gases. For this purpose, two gas chambers, of 42 L and 125 L, have been conceived and built at the LNE-LNHB to produce reference atmospheres of various gas mixtures. These chambers were created in order to provide any radioactive gas atmosphere with a wide range of activity concentrations (Bq·m-3 to MBq·m-3). The goal of this setup is to be representative of the different environmental conditions for detector qualification and to perform studies of radioactive gas absorption in materials of interest. As a result, the 2 chambers used in this experimental facility are designed to work from vacuum pressure to atmospheric pressure, with a constant activity concentration for any radioactive gas, and under dry to high humidity conditions. It can also be used in a static mode, in which the activity concentration will follow the radioactive decay of the gas. In this paper, the characterization of the chambers will be discussed. These two chambers are combined with different primary standards established by the LNE-LNHB. As the production of the reference atmosphere depends on the primary standard method, we present the details for each atmosphere production, which require a well-known volume, pressure or a direct activity concentration measurement. SN - 1872-9800 UR - https://www.unboundmedicine.com/medline/citation/31629295/Experimental_facility_for_the_production_of_reference_atmosphere_of_radioactive_gases_(Rn,_Xe,_Kr,_and_H_isotopes) L2 - https://linkinghub.elsevier.com/retrieve/pii/S0969-8043(19)30488-9 DB - PRIME DP - Unbound Medicine ER -