Skip to main content

RACK-TORCH UNIT FOR REMOTE DECONTAMINATION OF CONCRETE.

Objective

THE DECONTAMINATION OF CONCRETE, IN THE FRAMEWORK ON THE DECOMMISSIONING OF NUCLEAR INSTALLATIONS, POSES A PARTICULAR PROBLEM, DUE TO THE MIGRATION OF CONTAMINANTS INTO CONCRETE TO A DEPTH OF 1 TO 5 CM.

THE TECHNIQUE OF FISSURATION BY RACK-TORCH AND RAPID COOLING IS EXPECTED TO SUIT APPLICATION IN A HOSTILE ENVIRONMENT AND TO INVOLVE NOTABLY LOWER RADIATION EXPOSURE OF THE PERSONNEL THAN THE METHODS USED NOWADAYS SUCH AS HAMMERING.

THE OBJECTIVE OF THE PRESENT RESEARCH IS THE SETTING AND PERFECTING OF THE FISSURATION TECHNIQUE BY RACK-TORCH WITH A VIEW TO ITS SECURE AND OPTIMISED USE IN DECONTAMINATING CONCRETE STRUCTURES.
STMI have carried out trials in fracturing concrete by means of surface heating and thermal shock. These trials have permitted the removal of a concrete film where this is required by industrial processes.
B1. DESIGN AND MANUFACTURING OF THE RACK-TORCH PROTOTYPE.

B2. OPTIMISATION OF THE CONCRETE FISSURATION TECHNIQUE INCLUDING THE STUDY OF MOTION OF THE PROTOTYPE (MANUAL OR AUTOMATIC), THE PIEZO-ELECTRIC IGNITION DEVICE, THE SYSTEM FOR ASPIRATION, SEDIMENTATION AND FILTRATION OF AEROSOLS AND CONCRETE PARTICLES, VARIOUS TYPES OF RACK-TORCH FOR THE SCRAPING OF DIFFERENT SURFACES.

B3. SCRAPING TESTS ON VARIOUS TYPES OF CONCRETE (INACTIVE AND CONTAMINATED SAMPLES).

B4. DESIGN AND MANUFACTURING OF THE INDUSTRIAL PROTOTYPE.

B5. APPLICATION OF THE FISSURATION TECHNIQUE TO A NUCLEAR INSTALLATION INCLUDING RECOMMENDATIONS FOR THE BEST USE OF THIS TECHNIQUE.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Société des Techniques en Milieu Ionisant SA
Address
30 Rue Des Frères Lumière
78190 Trappes
France