The effects of the different flow rates of the decontamination solutions on the radioactive contamination state of steel tube surfaces originating from steam generators of Paks NPP were studied. A pilot-plant circulation system was developed to examine the effect of various technological parameters such as flow rate, contact time, chemical concentration and temperature. The very aim of the work presented in the first part of the series is to determine the optimal flow rate (even for each decontamination steps if required), at which the decontamination factor (DF) of the heat exchanger tubes increases remarkably without detrimental changes in the passivity of the surfaces. The results have proved that a significant increase in the flow rate of the decontamination solution up to 2.89 m/s in the 1-5 steps is highly recommended.
|Translated title of the contribution||Hydrodynamic study of the effectiveness of a decontamination technology utilized for steam generator, I. Nuclide analysis by γ-spectrometric method|
|Number of pages||7|
|Journal||Magyar Kemiai Folyoirat, Kemiai Kozlemenyek|
|Publication status||Published - Mar 1 2002|
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