Publications

Forty-Year Time Series of Anthropogenic Uranium in<i> Fucus vesiculosus</i> from Kattegat: Validating <sup>236</sup>U Releases from European Nuclear Reprocessing Plants

Author(s)
Jixin Qiao, Yiyao Cao, Mu Lin, Yanchun He, Peter Steier, Karin Hain
Abstract

An accurate input function of uranium-236 (236U) is essential for its numerous applications in environmental and ocean studies. This work reveals potential overestimation on 236U releases from the Sellafield (SF) nuclear reprocessing plant (RP) by earlier estimations using shells. We report a 40-year time series dataset of uranium isotopes in seaweed seasonally collected in the Kattegat, downstream of radioactive discharges from the European RPs, namely La Hague (LH) and SF. Comparison between our measured 236U concentrations in seaweed and model-simulated values derived from 236U releases of LH and SF suggests that the previously reconstructed SF discharges may have nearly 1 order of magnitude overestimation. Such overestimation would introduce large uncertainties when 236U is used as a point source in environmental tracer applications and ocean model validation. We foresee that this work will significantly improve the applications of radioisotope tracers in oceanic studies such as the spreading of marine pollutants, ocean mixing, and circulation, especially in the regions of the North Atlantic and Arctic Oceans.

Organisation(s)
Isotope Physics
External organisation(s)
Technical University of Denmark (DTU), Zhejiang Provincial Center for Disease Control and Prevention (Zhejiang CDC), Nansen Environmental and Remote Sensing Center, Bjerknes Centre for Climate Research
Journal
Environmental Science and Technology
Volume
59
Pages
2675-2685
No. of pages
11
ISSN
0013-936X
DOI
https://doi.org/10.1021/acs.est.4c07622
Publication date
01-2025
Peer reviewed
Yes
Austrian Fields of Science 2012
103014 Nuclear physics, 102009 Computer simulation
Keywords
ASJC Scopus subject areas
General Chemistry, Environmental Chemistry
Sustainable Development Goals
SDG 14 - Life Below Water
Portal url
https://ucrisportal.univie.ac.at/en/publications/1ff5771b-a87d-4a17-8b92-7fe03d5992f0