1 / 6

ANTIOXI WP2 EXPERIMENTS

ANTIOXI WP2 EXPERIMENTS. ANTIOXI Advisory Board meeting 6th February 2007. Planned tests. Electrochemical tests in which the adsorption of Zn is studied with electrochemical impedance spectroscopy (EIS) reference test run without Zn test run with 1 ppm Zn

dahlia
Download Presentation

ANTIOXI WP2 EXPERIMENTS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ANTIOXI WP2 EXPERIMENTS ANTIOXI Advisory Board meeting 6th February 2007

  2. Planned tests • Electrochemical tests in which the adsorption of Zn is studied with electrochemical impedance spectroscopy (EIS) • reference test run without Zn • test run with 1 ppm Zn • includes ex situ samples from which the thickness profiles of components can be determined • Sorption tests using trevorite (hematite?) with 1ppm Zn/Co • short term tests from which the sorption rate can be determined • sorpted amount of Zn or Co calculated using XRD analysis from solution samples • Surface properties of trevorite determined by titration tests both at ambient and elevated temperatures

  3. N2 N2 Zn/Co + H2O HPLC Sampling NiFe2O4 + LiOH+H3BO3+H2O Sorption tests Material trevorite Simulated PWR coolant T = 280oC p = 8.5 - 9 MPa

  4. 10 11 DATA ACQUISITION 7 8 9 N2 RE pH 3 4 5 6 N2 1 2 HPLC Experimental approach • High-temperature autoclave including a PTFE vessel • Control unit for the autoclave • Control unit for the heating cartridge in the PTFE vessel • HNO3 • Zn/Ni/Co(NO3)2 • NaOH • High-pressure liquid chromatography pump to add solutions to the autoclave • Nitrogen bubbling to remove oxygen from the autoclave • Nitrogen to remove oxygen from the solutions to be added to the autoclave • Data acquisition equipment • Computer Material NiFe2O3 T = 280oC p = 8.5 - 9 MPa

  5. Example of high-temperature experimental results Titration curves of hematite suspension containing different cations (Zn2+, Ni2+, Co2+) with theoretical surface coverages of 60% and 100%

  6. Kinetic and transport parameters for the incorporation of minor species Estimated kinetic and transport parameters of the incorporation of Zn into the growing oxides Experimental and predicted depth profiles of Zn in the inner layer of a growing oxide on AISI304 in PWR coolant for two periods of exposure (1000 and 10 000 h). AISI 304 with or without the addition of 30 ppb Zn in simulated PWR coolant

More Related