Naturally occurring radioactive substances in fish and sediments — Results from the water column monitoring and regional sediment monitoring 2024
Abstract
This report presents the findings from gamma spectrometric analyses of the naturally occurring radionuclides 210Pb, 226Ra, 228Ra and 228Th in muscle and bone of ling (Molva molva) and cusc (Brosme brosme) collected at Hywind, Snorre A, Oseberg and Sognesjøen (a control location) in 2024. The work is part of the water column monitoring. The activity concentrations of all radionuclides across all samples were below detection limits, indicating that any potential health risk to consumers of these fish from these areas is negligible concerning 210Pb, 226Ra, 228Ra and 228Th. To enhance the robustness of comparisons and conclusions, the study recommends obtaining lower detection limits and more accurate results, preferably through alpha spectrometry. Nontheless, for the primary goal of documenting low levels of these radionuclides in fish and seafood, the gamma spectrometry method employed in this study is concidered sufficient. Naturally occurring radioactive substances in fish and sediments — Results from the water column monitoring and regional sediment monitoring 2024