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00207 Development and Validation of ECP Model for BWR Application

Picture for 00207 Development and Validation of ECP Model
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Product Number: 51300-00207-SG
ISBN: 00207 2000 CP
Author: Young-Jin Kim
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This paper describes the theoretical understanding and development of the electrochemical corrosion potential (ECP) predictive model to calculate the ECP of structural materials in BWRs and evaluates the effects of the various model parameters, which were experimentally produced in high temperature, high purity water. The electrochemical kinetic parameters for the O2 reduction and H2 oxidation reactions were measured experimentally in 288°C water. To develop the ECP model in the presence of H2O2, the electrochemical kinetic constants for the H2O reduction reaction were assumed to be the same values as those for the O2 reduction reaction. Validation of the ECP model was conducted with limited laboratory and published plant ECP data. The ECP model appears to be in good agreement with limited laboratory and plant ECP values. However, more experimental works on the electrochemical kinetic measurements in 288°C water containing H2O2 or O2+H2O2 mixture are needed to improve the current ECP model. Keyword: BWR, ECP, 304 SS, high temperature water, oxygen, hydrogen, hydrogen peroxide, mixed potential
This paper describes the theoretical understanding and development of the electrochemical corrosion potential (ECP) predictive model to calculate the ECP of structural materials in BWRs and evaluates the effects of the various model parameters, which were experimentally produced in high temperature, high purity water. The electrochemical kinetic parameters for the O2 reduction and H2 oxidation reactions were measured experimentally in 288°C water. To develop the ECP model in the presence of H2O2, the electrochemical kinetic constants for the H2O reduction reaction were assumed to be the same values as those for the O2 reduction reaction. Validation of the ECP model was conducted with limited laboratory and published plant ECP data. The ECP model appears to be in good agreement with limited laboratory and plant ECP values. However, more experimental works on the electrochemical kinetic measurements in 288°C water containing H2O2 or O2+H2O2 mixture are needed to improve the current ECP model. Keyword: BWR, ECP, 304 SS, high temperature water, oxygen, hydrogen, hydrogen peroxide, mixed potential
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