Kinetics of Dissolution of Magnetite in PDCA Based Formulations

• Published in: Journal of nuclear science and technology Vol. 34; no. 8; pp. 810 - 816
• Main Authors: RANGANATHAN, Sailthanam, PRINCE, Amaladoss Antony Michael, RAGHAVAN, Pandalgudi Seshan, GOPALAN, Raghavachary, SRINIVASAN, Madapuzi Parthasarathy, NARASIMHAN, Sevilimedu Veeravalli
• Format: Journal Article
• Language: English
• Published: Tokyo Taylor & Francis 01.08.1997; Atomic Energy Society of Japan; Taylor & Francis Ltd
• Subjects: Applied sciences; ascorbic acid; chemical reaction kinetics; citric acid; decontamination; dissolution; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fission nuclear power plants; Installations for energy generation and conversion: thermal and electrical energy; iron complexes; magnetite solubility; pH value; pyridine dicarboxylic acid; temperature dependence; Heavy water reactors; Additives; Ascorbic acid; Magnetite; Corrosion; Kinetics; Nuclear reactors; Pressurized water reactors; Citric acid; Pyridine derivatives
• ISSN: 0022-3131; 1881-1248
• DOI: 10.1080/18811248.1997.9733745

Magnetite is one of the important corrosion products of pressurised heavy water reactors (PHWRs) where carbon steel is the dominant surface in the primary heat transport system. Designing of formulations capable of dissolving magnetite is important for effective decontamination of such surfaces. The rate of dissolution of synthetically prepared magnetite was studied in low concentrations of PDCA containing acidic formulations. The effect of addition of ascorbic acid, citric acid, Fe 2+ -PDCA complex on the rate was also studied. The effects of pH and the temperature on the dissolution rate were determined. The PDCA as a complexant has some positive factors like low protonation constant and enhanced stability to radiation.