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  • Development and testing of a decategorization process by electroerosion in nitric environment and application to alpha contaminated wastes of the RM2 installation


The main purpose of this project was to develop a process for decategorizing alpha-emitting radioactive wastes from RM2 facility (examination laboratory for fast breeder reactor fuel), making them suitable for surface disposal (activity limit: 3.7 MBq/kg{-1}).
An electrochemical process, called ANODDIN (Anodic Oxidation Decategorization for Nuclear Installation Decommissioning) was developed in which the waste materials are placed in a closed, horizontal rotating drum to ensure thorough contact with the electrolyte. An anode potential is applied to the drum, causing erosion of highly uniform depth on all the waste surfaces. A nitric acid based electrolyte is used to allow the resulting liquid waste to be sent to a nuclear fuel reprocessing plant.
Seven tests were conducted in a 35 litres drum directly extrapolated from the laboratory and installed in a large hot cell. Unsorted highly irradiating raw waste (0.1 - 0.4 Gy/h{-1} was treated. This technique may be suitable for use during other decommissioning operations. .

Additional information

Authors: COSTES J R, CEA-UDIN, Bagnols-sur-Cèze (FR);COCHAUD C, CEA-UDIN, Bagnols-sur-Cèze (FR)
Bibliographic Reference: EUR 16940 FR (1996) 61pp., FS, ECU 8.50
Availability: Available from the (2)
ISBN: ISBN 92-827-7817-7
Record Number: 199611332 / Last updated on: 1996-11-11
Original language: fr
Available languages: fr