Title: Formation of Zirconium Molybdate Sludge from an Irradiated Fuel and Its Dissolution into Mixture of Nitric Acid and Hydrogen Peroxide
Authors: USAMI TTSUKASDA T.INOUE T.MORIYA N.HAMADA T.SERRANO PURROY DanielMALMBECK RikardGLATZ Jean-Paul
Citation: JOURNAL OF NUCLEAR MATERIALS vol. 402 no. 2-3 p. 130-135
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2010
JRC N°: JRC60733
ISSN: 0022-3115
URI: http://www.sciencedirect.com/science/article/pii/S0022311510001984
http://publications.jrc.ec.europa.eu/repository/handle/JRC60733
DOI: 10.1016/j.jnucmat.2010.05.008
Type: Articles in Journals
Abstract: In the dissolution step of the PUREX process, a sludge of zirconium molybdate can be generated from zirconium and molybdenum dissolved in the solution. In order to avoid accumulation of sludge, a new cleaning method using a mixture of nitric acid and hydrogen peroxide was developed. In this work, the cleaning method was verified using an irradiated fuel. Cubic crystals of the zirconium molybdate ZrMo2O7(OH)2 were formed upon dissolution of an irradiated PWR fuel. The sludge deposition continued after the completion of the fuel dissolution. A small amount of fissile material was incorporated into the sludge. Although almost the same amount of insoluble residue was present, the sludge could be dissolved with a HNO3¿H2O2 solution at 80 C within 5 h. The sludge formation on the clean Zr surface is inhibited
JRC Institute:Institute for Transuranium Elements

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