Comparison of measured and simulated concentrations of 133 Xe in the shallow subsurface.

Autor: Johnson C; Pacific Northwest National Laboratory, Richland, WA, USA; Nuclear Engineering Teaching Laboratory, The University of Texas at Austin, Austin, TX, USA. Electronic address: christine.johnson@pnnl.gov., Biegalski SR; Nuclear Engineering Teaching Laboratory, The University of Texas at Austin, Austin, TX, USA; Georgia Institute of Technology, Atlanta, GA, USA., Lowrey JD; Pacific Northwest National Laboratory, Richland, WA, USA., Rockhold ML; Pacific Northwest National Laboratory, Richland, WA, USA., Haas DA; Nuclear Engineering Teaching Laboratory, The University of Texas at Austin, Austin, TX, USA.
Jazyk: angličtina
Zdroj: Journal of environmental radioactivity [J Environ Radioact] 2018 Sep; Vol. 189, pp. 207-212.
DOI: 10.1016/j.jenvrad.2018.04.010
Abstrakt: Radioactive isotopes of the noble gases xenon and argon are considered primary indicators of an underground nuclear explosion. However, high atmospheric concentrations from other anthropogenic sources may lead to an elevation in the underground levels of these gases, particularly in times of increasing atmospheric pressure. In 2014, a week long sampling campaign near Canadian Nuclear Laboratories in the Ottawa River Valley resulted in first of their kind measurements of atmospheric 133 Xe that had been pressed into the subsurface. In an effort to better understand this imprinting process, a second follow-up sampling campaign was conducted in the same location in 2016. The results of the second sampling campaign, where samples were collected at depths of 1 m and 2 m over a 14 day period and measured for their 133 Xe concentration, are presented here. Gas transport and sample concentrations were predicted using the Subsurface Transport over Multiple Phases (STOMP) simulator. These results are examined and compared to the corresponding experimental results.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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