دورية أكاديمية
أعرض في EDS

Gas diffusion through variably-water-saturated zeolitic tuff: Implications for transport following a subsurface nuclear event.

التفاصيل البيبلوغرافية
العنوان: Gas diffusion through variably-water-saturated zeolitic tuff: Implications for transport following a subsurface nuclear event.
المؤلفون: Neil CW; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA. Electronic address: cwneil@lanl.gov., Boukhalfa H; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA., Xu H; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA., Ware SD; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA., Ortiz J; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA; Department of Environmental Health and Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA., Avendaño S; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA., Harp D; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA., Broome S; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Hjelm RP; National Security Education Center, Los Alamos National Laboratory and the New Mexico Consortium, Los Alamos, NM, 87545, USA., Mao Y; Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA., Roback R; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA., Brug WP; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA., Stauffer PH; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
المصدر: Journal of environmental radioactivity [J Environ Radioact] 2022 Sep; Vol. 250, pp. 106905. Date of Electronic Publication: 2022 May 19.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Applied Science Publishers Country of Publication: England NLM ID: 8508119 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1700 (Electronic) Linking ISSN: 0265931X NLM ISO Abbreviation: J Environ Radioact Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة: Original Publication: Barking, Essex : Elsevier Applied Science Publishers,
مستخلص: Noble gas transport through geologic media has important applications in the characterization of underground nuclear explosions (UNEs). Without accurate transport models, it is nearly impossible to distinguish between xenon signatures originating from civilian nuclear facilities and UNEs. Understanding xenon transport time through the earth is a key parameter for interpreting measured xenon isotopic ratios. One of the most challenging aspects of modeling gas transport time is accounting for the effect of variable water saturation of geological media. In this study, we utilize bench-scale laboratory experiments to characterize the diffusion of krypton, xenon, and sulfur hexafluoride (SF 6 ) through intact zeolitic tuff under different saturations. We demonstrate that the water in rock cores with low partial saturation dramatically affects xenon transport time compared to that of krypton and SF 6 by blocking sites in zeolitic tuff that preferentially adsorb xenon. This leads to breakthrough trends that are strongly influenced by the degree of the rock saturation. Xenon is especially susceptible to this phenomenon, a finding that is crucial to incorporate in subsurface gas transport models used for nuclear event identification. We also find that the breakthrough of SF 6 diverges significantly from that of noble gases within our system. When developing field scale models, it is important to understand how the behavior of xenon deviates from chemical tracers used in the field, such as SF 6 (Carrigan et al., 1996). These new insights demonstrate the critical need to consider the interplay between rock saturation and fission product sorption during transport modeling, and the importance of evaluating specific interactions between geomedia and gases of interest, which may differ from geomedia interactions with chemical tracers.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
فهرسة مساهمة: Keywords: Diffusion; Noble gases; Nonproliferation; Underground nuclear explosion; Zeolites
تواريخ الأحداث: Date Created: 20220522 Latest Revision: 20220609
رمز التحديث: 20240829
DOI: 10.1016/j.jenvrad.2022.106905
PMID: 35598406
قاعدة البيانات: MEDLINE
الوصف
تدمد:1879-1700
DOI:10.1016/j.jenvrad.2022.106905