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The RApsodie SOdium DEstruction (DESORA) plant was undertaken to dispose of 37 tons of primary sodium, and to develop an industrial sodium disposal unit. The DESORA plant is based on the NOAH (anagram of NaOH) process developed by the CEA which was qualified in a Cadarache test facility using non-radioactive sodium. The process involves reacting small quantities of sodium injected via a dosing pump in a strong water flow inside a closed vessel, producing aqueous sodium hydroxide and hydrogen gas. The sodium quickly disperses in the water, reacting smoothly and continuously. The DESORA project started in 1990 with a study to implement the NOAH process industrially. The main radionuclides met during this operation were Na-22, Cs-137 and tritium. Thirty-seven tons of primary sodium were treated in two months of continuous operation. The average sodium treatment rate was about 33 1/h. The aqueous sodium hydroxide was sent to COGEMA's La Hague fuel reprocessing Centre for treatment or reuse, and about 18500 m{3} of hydrogen released from the RAPSODIE stack. Contamination of the unit circuits with radioactive materials was low. Caesium was found mainly in the aqueous sodium hydroxide, and tritium mainly in the hydrogen.

Additional information

Authors: ROGER J, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);PEULVÉ J, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);PASQUINI S, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);LATGÉ C, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);MASSE F, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);RODRIGUEZ R, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: EUR 16881 FR (1996) 57pp., FS, ECU 8.50
Availability: Available from the (2)
ISBN: ISBN 92-827-6898-8
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