Commissariat a L'energie Atomique

Other

Compagnie Generale Des Matieres Nucleaires

Areva Nc

Commissariat a L'energie Atomique France Compagnie Generale Des Matleres Nucleaires

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Bruno Fournel

Sylvain Faure

Paul Fuentes

Maria Faury

Yvan Lallot

Patrick Lacroix-Desmazes

Sébastien Donet

Jean-Marie Le Samedy

Jean-Paul Gauchon

Jean-Christophe Ruiz

Jean-Pierre Turchet

Jérôme Blancher

Jacques Delagrange

Xavier Frechou

Sophie Dussolliet

Serge Lagerge

Frédéric Barth

Julien Galy

Patrick Lacroix Desmazez

Process for decontaminating, cleaning a solid organic substrate contaminated by solid radioactive particulate inorganic contaminants, in which:

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The present invention related to a method for treating a surface with a gel, as well as to a treatment gel. The treatment may be a decontamination, etching or surface degreasing treatment, for example. The method comprises in this order, the following steps: applying the treatment gel on the surface to be treated, maintaining the treatment gel on the surface to be treated at a temperature and relative humidity such that the gel dries by breaking up and that it has the time to treat the surface before forming a dry and solid residue, and removing the dry and solid residue from the treated surface by suction or brushing. The gel comprises a viscosing agent, a treatment agent and optional an oxidizing agent.

Method for treating a surface with a treatment gel, and treatment gel

The present invention relates to a method for treating a surface with a gel, as well as to a treatment gel. The treatment may be a decontamination, etching or surface degreasing treatment, for example. The method comprises in this order, the following steps: applying the treatment gel on the surface to be treated, maintaining the treatment gel on the surface to be treated at a temperature and relative humidity such that the gel dries by breaking up and that it has the time to treat the surface before forming a dry and solid residue, and removing the dry and solid residue from the treated surface by suction or brushing. The gel comprises a viscosing agent, a treatment agent and optionally an oxidizing agent.

Method for treating a surface with a treatment gel and treatment gel

The invention relates to a composition which makes it possible to obtain a gelled aqueous foam capable of decontaminating, stripping or degreasing a surface. The composition of the present invention comprises one or more surfactants, one or more acidic or basic reactants and a gelling agent. The decontamination foam obtained from this composition exhibits long lifetimes, generally of between 1 and 10 hours, guaranteeing a prolonged time of action on the surface and a high decontamination effectiveness. These foams can be used to remove the radioactivity from an inaccessible plant, which is large in size and complex in design, by simple filling or by simple spraying over an accessible surface.

Composition, foam and process for the decontamination of surfaces

The invention relates to a method for generating a foam from a liquid phase and a gas phase, a method for placing a foam in circulation in an installation, and a method for cleaning an installation by placing a foam in circulation. Generation of the foam is made by aspiration of an appropriate liquid phase and an appropriate gas phase to generate a foam through a porous lining. The invention also relates to a system for generating a foam and to a system for generating and placing a foam in circulation in an installation.

Method for generating and circulating a foam in an installation and system for application of this method

A method, a module, and a device for gas-liquid contacting. The liquid is sent, in the presence of the gas, in jet form in a first direction onto a wall inclined at an angle of 35-55 degrees with respect to the first direction, the wall dispersing the liquid jet into the gas. The module includes a structure () for sending a liquid jet in a first direction, a structure () for creating a gas flow, and a wall () inclined at an angle of 35-55 degrees.

Method, module and device for contacting a gas and a liquid

Degreasing composition and methods using same

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Vinon sur Verdon, France

Bruno Fournel