U, Pu, and Am nuclear signatures of the thule hydrogen bomb debris
This study concerns an arctic marine environment that was contaminated by actinide elements after a nuclear accident in 1968, the so-called Thule accident. In this study we have analyzed five isolated hot particles as well as sediment samples containing particles from the weapon material for the det...
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American Chemical Society
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Online Access: | http://hdl.handle.net/10261/75285 https://doi.org/10.1021/es800203f |
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ftcsic:oai:digital.csic.es:10261/75285 2024-02-11T10:01:49+01:00 U, Pu, and Am nuclear signatures of the thule hydrogen bomb debris Eriksson, M. Holm, E. 2008 http://hdl.handle.net/10261/75285 https://doi.org/10.1021/es800203f en eng American Chemical Society doi:10.1021/es800203f issn: 0013-936X e-issn: 1520-5851 Environmental Science and Technology 42(13): 4717-4722 (2008) http://hdl.handle.net/10261/75285 none artículo http://purl.org/coar/resource_type/c_6501 2008 ftcsic https://doi.org/10.1021/es800203f 2024-01-16T09:49:00Z This study concerns an arctic marine environment that was contaminated by actinide elements after a nuclear accident in 1968, the so-called Thule accident. In this study we have analyzed five isolated hot particles as well as sediment samples containing particles from the weapon material for the determination of the nuclear fingerprint of the accident. We report that the fissile material in the hydrogen weapons involved in the Thule accident was a mixture of highly enriched uranium and weapon-grade plutonium and that the main fissile material was 235U (about 4 times more than the mass of 239Pu). In the five hot particles examined, the measured uranium atomic ratio was 235U/238U = 1.02 ± 0.16 and the Pu-isotopic ratios were as follows: 240Pu/239Pu = 0.0551 ± 0.0008 (atom ratio), 238Pu/239+240Pu = 0.0161 ± 0.0005 (activity ratio), 241Pu/239+240Pu = 0.87 ± 0.12 (activity ratio), and 241Am/239+240Pu = 0.169 ± 0.005 (activity ratio) (reference date 2001-10-01). From the activity ratios of 241Pu/241Am, we estimated the time of production of this weapon material to be from the late 1950s to the early 1960s. The results from reanalyzed bulk sediment samples showed the presence of more than one Pu source involved in the accident, confirming earlier studies. The 238Pu/239+240Pu activity ratio and the 240Pu/239Pu atomic ratio were divided into at least two Pu-isotopic ratio groups. For both Pu-isotopic ratios, one ratio group had identical ratios as the five hot particles described above and for the other groups the Pu isotopic ratios were lower (238Pu/239+240Pu activity ratio ∼ 0.01 and the 240Pu/239Pu atomic ratio ∼ 0.03). On the studied particles we observed that the U/Pu ratio decreased as a function of the time these particles were present in the sediment. We hypothesis that the decrease in the ratio is due to a preferential leaching of U relative to Pu from the particle matrix. © 2008 American Chemical Society. The authors acknowledge NKS framework program BOK-2 and the Royal Physiographic Society for financial ... Article in Journal/Newspaper Arctic Digital.CSIC (Spanish National Research Council) Arctic Environmental Science & Technology 42 13 4717 4722 |
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Digital.CSIC (Spanish National Research Council) |
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ftcsic |
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English |
description |
This study concerns an arctic marine environment that was contaminated by actinide elements after a nuclear accident in 1968, the so-called Thule accident. In this study we have analyzed five isolated hot particles as well as sediment samples containing particles from the weapon material for the determination of the nuclear fingerprint of the accident. We report that the fissile material in the hydrogen weapons involved in the Thule accident was a mixture of highly enriched uranium and weapon-grade plutonium and that the main fissile material was 235U (about 4 times more than the mass of 239Pu). In the five hot particles examined, the measured uranium atomic ratio was 235U/238U = 1.02 ± 0.16 and the Pu-isotopic ratios were as follows: 240Pu/239Pu = 0.0551 ± 0.0008 (atom ratio), 238Pu/239+240Pu = 0.0161 ± 0.0005 (activity ratio), 241Pu/239+240Pu = 0.87 ± 0.12 (activity ratio), and 241Am/239+240Pu = 0.169 ± 0.005 (activity ratio) (reference date 2001-10-01). From the activity ratios of 241Pu/241Am, we estimated the time of production of this weapon material to be from the late 1950s to the early 1960s. The results from reanalyzed bulk sediment samples showed the presence of more than one Pu source involved in the accident, confirming earlier studies. The 238Pu/239+240Pu activity ratio and the 240Pu/239Pu atomic ratio were divided into at least two Pu-isotopic ratio groups. For both Pu-isotopic ratios, one ratio group had identical ratios as the five hot particles described above and for the other groups the Pu isotopic ratios were lower (238Pu/239+240Pu activity ratio ∼ 0.01 and the 240Pu/239Pu atomic ratio ∼ 0.03). On the studied particles we observed that the U/Pu ratio decreased as a function of the time these particles were present in the sediment. We hypothesis that the decrease in the ratio is due to a preferential leaching of U relative to Pu from the particle matrix. © 2008 American Chemical Society. The authors acknowledge NKS framework program BOK-2 and the Royal Physiographic Society for financial ... |
format |
Article in Journal/Newspaper |
author |
Eriksson, M. Holm, E. |
spellingShingle |
Eriksson, M. Holm, E. U, Pu, and Am nuclear signatures of the thule hydrogen bomb debris |
author_facet |
Eriksson, M. Holm, E. |
author_sort |
Eriksson, M. |
title |
U, Pu, and Am nuclear signatures of the thule hydrogen bomb debris |
title_short |
U, Pu, and Am nuclear signatures of the thule hydrogen bomb debris |
title_full |
U, Pu, and Am nuclear signatures of the thule hydrogen bomb debris |
title_fullStr |
U, Pu, and Am nuclear signatures of the thule hydrogen bomb debris |
title_full_unstemmed |
U, Pu, and Am nuclear signatures of the thule hydrogen bomb debris |
title_sort |
u, pu, and am nuclear signatures of the thule hydrogen bomb debris |
publisher |
American Chemical Society |
publishDate |
2008 |
url |
http://hdl.handle.net/10261/75285 https://doi.org/10.1021/es800203f |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
doi:10.1021/es800203f issn: 0013-936X e-issn: 1520-5851 Environmental Science and Technology 42(13): 4717-4722 (2008) http://hdl.handle.net/10261/75285 |
op_rights |
none |
op_doi |
https://doi.org/10.1021/es800203f |
container_title |
Environmental Science & Technology |
container_volume |
42 |
container_issue |
13 |
container_start_page |
4717 |
op_container_end_page |
4722 |
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1790597614416166912 |