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Enhancing Nuclear Safety


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Characterisation of aerosols produced by laser cutting.

S. Fauvel*(1) , G. Pilot (1) , G. De Dinechin (2) X. Gosse (3) et P. Arnaud (4) - CFA 2005 - 21ème congrès français sur les aérosols, 14-15/12/05, Paris.

Document type > *Congrès/colloque

Keywords > aerosols - measuring methods

Research Unit > IRSN/DSU/SERAC/LPMA

Authors > FAUVEL Sylvain, PILOT Guy

Publication Date > 14/12/2005

Summary

Powerful lasers represent a promising alternative solution to traditional cutting processes used in dismantling nuclear equipments. The use of optical fibers has an unquestionable advantage when dealing with airtight workshops. A study funded by COGEMA Marcoule was undertaken by IRSN/SERAC in collaboration with GIP/GERAILP in order to characterise the aerosols emitted by the cutting of evaporators’ elements with a 4 kW continuous wave Nd:YAG laser. For this study, laser cutting has been carried out in a tight room of 35 m3 connected to a particle sampling pipe. Isokinetic samplers allowed the measurement of the aerosol concentration. A diffusional and inertial spectrometer (SDI 2001) — an Andersen impinger coupled to a diffusion battery — provided the size distribution. An electrostatic filter used upstream a HEPA filter, itself placed before the extractor fan, collected the majority of the emitted aerosol. Its efficiency was measured and controlled throughout the experiments. The results show the influence of the cutting conditions on the characteristics of the aerosol, and allow a comparison with other cutting tools.



(1) Laboratoire de Physique et de Métrologie des Aérosols, IRSN/DSU/SERAC,
BP 68, Bât 389, 91192 Gif-sur-Yvette Cedex
sylvain.fauvel@irsn.fr
(2) Groupe d’Intérêt Public Groupement d’Etudes et de Recherche pour les Applications Industrielles des Lasers de Puissance, Bât 107, 16 bis, avenue prieur de la côte d’Or, 94114 Arcueil Cedex.
& Commissariat à l’Energie Atomique/DRT/LITEN, Bât 611, 91191 Gif sur Yvette Cedex
(3) Direction de l’Assainissement et des Projets, Maîtrise d’Oeuvre Projets, COGEMA Etablissement de Marcoule, BP 76170, 30206 Bagnols sur Cèze Cedex
(4) Ligne de Produit Démantèlement, SGN, ZA de l’Euze, BP 144, 30204 Bagnols sur Cèze

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