Testing and control of the placing of sealants and of the sealing of deposits in bore-holes or galleries using small-scale models
In the case of an underground disposal of radioactive waste, the space between the storage containers and the rock embedment must be backfilled in order to restore both mechanical and thermal continuity of the excavated material and form a physico-chemical barrier against the diffusion into the subsoil of the radionuclides which may be released by the possible failure of a container. The aim of this research was to formulate a hydraulic binder based sealant, whose rheological properties when fresh allow an easy placing and whose mechanical and physico-chemical properties in its hardened state guarantee the effectiveness of the impervious barrier. Initial laboratory work identified the formulations to be tested on scale models. These models, which simulate storage in vertical shafts (high level radioactive waste) and in galleries (medium level radioactive waste), show the efficiency of the placing techniques and the sealing behaviour when submitted to the heat generated by the waste. The sorptive mortar Petrisol, patented by Soletanche, provides a solution meeting not only the technical requirements, but also the public expectations as far as environmental protection is concerned.
Bibliographic Reference: EUR 13361 FR (1991) 48 pp., FS, ECU 6.25
ISBN: ISBN 92-826-0552-3
Record Number: 199110584 / Last updated on: 1994-12-02
Original language: fr
Available languages: fr