Source term estimation in the presence of nuisance signals
Many source-term estimation algorithms for atmospheric releases assume the measured concentration data are influenced only by the releases of interest. However, there are situations where identifying a short-term release from an unknown location in the presence of long-term releases from a different...
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Veröffentlicht in: | Journal of Environmental Radioactivity 2019-07, Vol.203, p.220-225 |
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container_title | Journal of Environmental Radioactivity |
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creator | Eslinger, Paul W. Mendez, Jennifer M. Schrom, Brian T. |
description | Many source-term estimation algorithms for atmospheric releases assume the measured concentration data are influenced only by the releases of interest. However, there are situations where identifying a short-term release from an unknown location in the presence of long-term releases from a different location is of interest. One such example is determining if part or all of a typical magnitude concentration of a radioactive isotope in a sampler came from a nuclear explosion, such as the explosion announced by DPRK in 2013, while medical isotope facilities and nuclear power plants were also operating in the region.
An estimation algorithm has been developed for the case where a short-duration release is confounded by a long-term nuisance signal associated with an additional release location. The technique is demonstrated using synthetic release data for a hypothetical medical isotope production facility and a hypothetical puff release from a different location. The algorithm successfully determines the location (within 30 km) and time-varying release rate (within a factor of 2) for the medical isotope production facility and the location (within 60 km), time (within 6 h), and release magnitude (within a factor of 4) of the puff release.
•New algorithm for source-term estimation for two or more concurrent release locations.•Algorithm quantifies uncertainty in the release time and location.•Algorithm performs successfully using synthetic data for two release locations. |
doi_str_mv | 10.1016/j.jenvrad.2019.03.022 |
format | Article |
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An estimation algorithm has been developed for the case where a short-duration release is confounded by a long-term nuisance signal associated with an additional release location. The technique is demonstrated using synthetic release data for a hypothetical medical isotope production facility and a hypothetical puff release from a different location. The algorithm successfully determines the location (within 30 km) and time-varying release rate (within a factor of 2) for the medical isotope production facility and the location (within 60 km), time (within 6 h), and release magnitude (within a factor of 4) of the puff release.
•New algorithm for source-term estimation for two or more concurrent release locations.•Algorithm quantifies uncertainty in the release time and location.•Algorithm performs successfully using synthetic data for two release locations.</description><identifier>ISSN: 0265-931X</identifier><identifier>EISSN: 1879-1700</identifier><identifier>DOI: 10.1016/j.jenvrad.2019.03.022</identifier><identifier>PMID: 30928687</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>atmospheric modeling, source term estimation, atmospheric dilution, concurrent releases</subject><ispartof>Journal of Environmental Radioactivity, 2019-07, Vol.203, p.220-225</ispartof><rights>2019 Elsevier Ltd</rights><rights>Copyright © 2019 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c439t-a14cea4e7789cf2a30e6557e0ed2875d43e3233edd5a4c46842008bd93ddd0583</citedby><cites>FETCH-LOGICAL-c439t-a14cea4e7789cf2a30e6557e0ed2875d43e3233edd5a4c46842008bd93ddd0583</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jenvrad.2019.03.022$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,885,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/30928687$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/1530551$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Eslinger, Paul W.</creatorcontrib><creatorcontrib>Mendez, Jennifer M.</creatorcontrib><creatorcontrib>Schrom, Brian T.</creatorcontrib><creatorcontrib>Pacific Northwest National Lab. (PNNL), Richland, WA (United States)</creatorcontrib><title>Source term estimation in the presence of nuisance signals</title><title>Journal of Environmental Radioactivity</title><addtitle>J Environ Radioact</addtitle><description>Many source-term estimation algorithms for atmospheric releases assume the measured concentration data are influenced only by the releases of interest. However, there are situations where identifying a short-term release from an unknown location in the presence of long-term releases from a different location is of interest. One such example is determining if part or all of a typical magnitude concentration of a radioactive isotope in a sampler came from a nuclear explosion, such as the explosion announced by DPRK in 2013, while medical isotope facilities and nuclear power plants were also operating in the region.
An estimation algorithm has been developed for the case where a short-duration release is confounded by a long-term nuisance signal associated with an additional release location. The technique is demonstrated using synthetic release data for a hypothetical medical isotope production facility and a hypothetical puff release from a different location. The algorithm successfully determines the location (within 30 km) and time-varying release rate (within a factor of 2) for the medical isotope production facility and the location (within 60 km), time (within 6 h), and release magnitude (within a factor of 4) of the puff release.
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An estimation algorithm has been developed for the case where a short-duration release is confounded by a long-term nuisance signal associated with an additional release location. The technique is demonstrated using synthetic release data for a hypothetical medical isotope production facility and a hypothetical puff release from a different location. The algorithm successfully determines the location (within 30 km) and time-varying release rate (within a factor of 2) for the medical isotope production facility and the location (within 60 km), time (within 6 h), and release magnitude (within a factor of 4) of the puff release.
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source | Access via ScienceDirect (Elsevier) |
subjects | atmospheric modeling, source term estimation, atmospheric dilution, concurrent releases |
title | Source term estimation in the presence of nuisance signals |
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