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Zirconium alloy chips (M5, Zirlo, and Zircaloy) are generated in high quantities in the manufacture of tubes and end caps of the rods that form the fuel element of pressurized water reactors (PWR). These are imported alloys and so it is shown interest by the recycling industry in its reuse. This work presents the studies of a recycling process and the obtaining of electrodes pressed to be melted in a Vacuum Arc Remelting (VAR) furnace. The process begins with a magnetic separation, washing of the water-soluble cutting fluid, use of an industrial degreaser, followed by a rinse with continuous high-pressure water flow and drying by hot air flow. To obtain electrodes, the chips were pressed in a square section die 40x40 mm2 with 500 mm in length resulting in an electrode with 20% of the apparent density of the alloy. The melting was done a laboratory VAR furnace in the CCTM-IPEN, generating a massive ingot of 0.8 kg. The melting of the chips is possible and viable in a VAR furnace that reduces the storage volume of this material by up to 40 times.

Study of recycling process viability of zirconium alloys chips for melting in VAR furnace