Fundamental
issues of the effective decontamination of the steam generators of Paks NPP</p>
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Authors: | K Radó Z Németh K Varga J Schunk F Kőrösi |
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Institution: | 18201. University of Veszprém, Department of Radiochemistry, H-8201 Veszprém, P.O. Box 158, Hungary 18202. University of Veszprém, Department of Radiochemistry, H-8201 Veszprém, P.O. Box 158, Hungary 18203. University of Veszprém, Department of Radiochemistry, H-8201 Veszprém, P.O. Box 158, Hungary 18204. Paks Nuclear Power Plant Ltd, H-7031 Paks, P.O. Box 71, Hungary 18205. Szent István University, Department of Physics and Process Control, H-2100 G?d?ll?, Páter Károly Str. 1, Hungary
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Abstract: | Summary During
the period of 1993-2001 chemical decontaminations of 24 SGs in the units 1-3 of
the Paks NPP were carried out by a non-regenerative version of AP-CITROX
technology, even in two or three consecutive cycles. A comprehensive
investigation of the above decontamination method have revealed that the
fundamental issues of analytical chemistry and corrosion science were not taken
into consideration during the elaboration of AP-CITROX procedure. Therefore,
the non-regenerative version of the technology utilized at Paks NPP can be
considered to be not an adequate method for the chemical decontamination of any
reactor equipments having large steel surfaces (e.g., SGs). As a consequence of
the lack of the appropriate decontamination method, initiation of a R&D project
focused on the elaboration of the required technology should not be postponed.
In this paper, we present a brief overview on the fundamental issues of the
technology development. Selected findings obtained in our laboratory on
the field of the improvement of the AP-CITROX technology are also reviewed in
order to demonstrate the crucial role of some selection criteria.</p>
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