Further development and application of a method for assessing radionuclide surface activity distribution and source location based on measurements of ambient dose equivalent rate. Examples for Andreeva Bay, Chernobyl NPP and Istiklol.

Autor:	Chizhov K; Joint Institute for Nuclear Research, Dubna, Russia., Bragin Y; State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow, Russia., Sneve MK; Norwegian Radiation and Nuclear Safety Authority, Østerås, Norway., Shandala N; State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow, Russia., Seregin V; State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow, Russia., Siegien K; Norwegian Radiation and Nuclear Safety Authority, Østerås, Norway., Smith GM; GMS Abingdon Ltd, United Kingdom and Clemson University, Abingdon, SC, United States of America., Ksenofontov A; National Research Nuclear University, Moscow, Russia., Kryanev A; National Research Nuclear University, Moscow, Russia., Tesnov I; State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow, Russia., Shimansky Y; Northwest Center for Radioactive Waste Management (SevRAO) of the Federal State Unitary Enterprise 'Federal Environmental Operator', Murmansk, Russia., Goncharenko G; Northwest Center for Radioactive Waste Management (SevRAO) of the Federal State Unitary Enterprise 'Federal Environmental Operator', Murmansk, Russia., Drozdovitch V; Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Bethesda, MD, United States of America., Kryuchkov V; State Research Center-Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency (SRC-FMBC), Moscow, Russia.
Jazyk:	angličtina
Zdroj:	Journal of radiological protection : official journal of the Society for Radiological Protection [J Radiol Prot] 2023 Oct 25; Vol. 43 (4). Date of Electronic Publication: 2023 Oct 25.
DOI:	10.1088/1361-6498/ad005c
Abstrakt:	A method for reconstructing surface activity density (SAD) maps based on the solution of the Fredholm equation has been developed and applied. The construction of SAD maps was carried out for the site of the temporary storage (STS) of spent fuel and radioactive waste (RW) in Andreeva Bay using the results of measuring campaign in 2001-2002 and for the sheltering construction of the solid RW using the results of measurements in 2021. The Fredholm equation was solved in two versions: under conditions of a barrier-free environment and taking into account buildings and structures located on the industrial site of the STS Andreeva Bay. Lorenz curves were generated to assess the compactness of the distributions of SAD and ambient dose equivalent rate (ADER) for the industrial site and the sheltering construction at STS Andreeva Bay, the area of the IV stage uranium tailing site near the city of Istiklol in the Republic of Tajikistan, and for roofs of the Chernobyl nuclear power plant. The nature of impact of the resolution (fragmentation) of the raster, the value of the radius of mutual influence of points (contamination sites), the height of the radiation detector above the scanned surface and the angular aperture of the radiation detector on the accuracy of the SAD reconstruction is shown. The method developed allows more accurate planning of decontamination work when only ADER measurements data is available. The proposed method can be applied to support the process of decontamination of radioactively contaminated territories, in particular during the remediation of the STS Andreeva Bay. (© 2023 Society for Radiological Protection. Published on behalf of SRP by IOP Publishing Limited. All rights reserved.)
Databáze:	MEDLINE
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