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The objective of this project has been the study and development of underwater cutting, decontamination and melting techniques using selected aluminium components of the JEN-1 reactor core. The cutting and melting activities were carried out in experimental facilities designed and built specifically for these tasks. Two thermal techniques, plasma arc and consumable electrode water jet, were used during underwater cutting activities. Decontamination tests were carried out by electropolishing and ultrasonic techniques on aluminium components previously cut. Melting tests were realized with aluminium pieces of the primary circuit collector, the ionization chambers support and the core grid support, components whose specific activity was lower than the limit established by the regulatory authority. Melting was mainly focused as a decontamination technique from a viewpoint of recycling material as well as getting a volume reduction. Relating to gaseous effluents coming from the underwater cutting and melting facilities, the environmental radiological impact has not been relevant due to the confined exhaust systems for both facilities and to the water shielding in the first one. The collective dose has been very low during these activities.

Additional information

Authors: MAÑAS L ET AL, Ciemat, Madrid (ES);BACH F W ET AL, Universität Hannover, Institut für Werkstoffkunde (DE);SELGAS F, Enresa, Madrid (ES);BENAVIDES E, Equipos Nucleares SA, Madrid (ES);ARGILÉS E ET AL, Lainsa, Madrid (ES)
Bibliographic Reference: EUR 16899 EN (1996) 89pp., FS, ECU 11.50
Availability: Available from the (2)
ISBN: ISBN 92-827-3915-5
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