Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 288: Issue 3
Accumulation of uranium, transuranium and fission products on stainless steel surfaces II. Sorption studies in a laboratory model system
Authors:
P. Kádár Institute of Radiochemistry and Radioecology, University of Pannonia, Veszprém, Hungary

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K. Varga Institute of Radiochemistry and Radioecology, University of Pannonia, Veszprém, Hungary

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B. Baja Institute of Radiochemistry and Radioecology, University of Pannonia, Veszprém, Hungary

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Z. Németh Institute of Radiochemistry and Radioecology, University of Pannonia, Veszprém, Hungary

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N. Vajda RadAnal Ltd., Budapest, Hungary

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Zs. Stefánka Institute of Isotopes, Hungarian Academy of Science, Budapest, Hungary

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L. Kövér Electron Spectroscopy and Materials Science Section, Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Hungary

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I. Cserny Electron Spectroscopy and Materials Science Section, Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Hungary

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J. Tóth Electron Spectroscopy and Materials Science Section, Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Hungary

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T. Pintér Paks NPP Ltd., Paks, Hungary

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J. Schunk Paks NPP Ltd., Paks, Hungary

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Pages:
943–954
Online Publication Date:
04 Mar 2011
Publication Date:
01 Jun 2011
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10967-011-1038-6
Keywords:
Accumulation; Stainless steel; Uranium and transuranium; Alpha-spectrometry; ICP-MS; SEM-EDX; XPS
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Abstract  

Within the frame of a joint project, the accumulation of the uranium and transuranium (TRU) species on some structural materials used at Soviet made VVER-type pressurized water reactors (such as heat exchanger tube of steam generators and stainless steel canister material) has been studied. The experiments were carried out in a laboratory model system. During the sorption studies, boric acid coolants provided by the Paks Nuclear Power Plant (Paks NPP) were circulated for a period of 30 h. Solution and tube samples obtained in the course of above experiments were analyzed by independent methods (α- and γ-spectrometry, ICP-MS, SEM-EDX, voltammetry and XPS). The experimental results reveal that: (i) the surface excess of the TRU nuclides studied is extremely low (less than 1% of a monolayer coverage); (ii) the surface excess of uranium species measured on the SG tube surfaces is significantly higher, after 30 h sorption period (Γsample = 1.0 μg cm−2 U ≅ 3.7 × 10−9 mol cm−2 UO2) exceeds a monolayer coverage; (iii) the mechanistic features of the contamination processes (specific or non-specific adsorption, deposition of colloidal and/or disperse particles) depend decisively upon the nature of the studied radionuclides and the chemical structure and composition of the oxide layer formed on stainless steel surfaces.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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