#Maquette help crack
The system is completed by six monitoring boreholes, three of them for pressure observations and the other 3 for crack detection using geophones.ĪRQUIMEA was contracted to perform every related aspect to the heated boreholes and heating operation of the experiment, that is to say: design, validation, fabrication, installation, operation and maintenance of: 10 heaters, casing and cementation works, control system and temperature instrumentation. The instrumentation is composed by 450 high accuracy thermo-resistances installed in contact with the borehole inner casing surface and 40 thermocouples to monitor inner temperatures at the heaters.
A 10 m long heater has been installed at the bottom of each borehole. The experiment is composed by 10 heated boreholes 20 m long and 172 mm of diameter: two boreholes in the center and eight in the periphery. It will get important scientific data that will increase the knowledge of Thermo-Hydro-Mechanics behavior and the modelling capacity of these phenomena. Maquette is a critical experiment performed in Bure Laboratory aiming to determine the threshold of thermal fracking of the host rock where the waste will be disposed. Within this frame, the Underground Laboratory of Bure has been built as an exceptional tool to perform the research activities required to implement Cigeo. ANDRA oversees the Cigeo project (Industrial Centre for Geological Disposal) consisting of a deep geological facility aimed for disposing of the highly radioactive long-lived waste. ANDRA is the French Agency responsible for identifying, implementing and granting the safe management and disposal of all the French radioactive waste, in order to protect the present and future generations from the risks inherent in such substances.
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