Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Engineering geological and safety technological aspects for the final disposal of in situ-consolidated radioactive waste in hard rock and salt formations
Abstract In connection with its research and development work the Gesellschaft für Strahlen- und Umweltforschung mbH München (GSF) has successfully developed and tested methods for the final disposal of low and medium radioactive waste in 200 litre containers at the Asse salt mine. The low radioactive waste (LLW) was disposed of in chambers using various methods. The medium radioactive waste (MLW) was transported in single radiation shielding containers of almost 9 t weight into the former rocksalt mine. Subsequently the 200 l containers were lowered into the storage chamber. Analysis of past experience indicated that the storage methods as developed could be improved upon. Under the direction of the Reprocessing Project (PWA: Projekt Wiederaufarbeitung) in Kalrsruhe an R & D programme was started for the containerless final disposal of low and medium radioactive waste with subsequent consolidation in situ into a quasi-monolithic block. The process consists of the following steps: The low and medium radioactive waste produced in a reprocessing plant is processed into a 5 mm cement granulate. The hardened cement granulate is mixed in an aboveground installation with a cement slurry. The mixed product is dosed with additives and channelled under gravity down a vertical conduit of only 60 mm diameter into 75 000 $ cm^{3} $ caverns. Several other parties are involved in the project, which has been underway since 1976 in three main phases.Phase I Proof of technical feasibility in principlePhase II Preparation of a detailed technical conceptPhase III Large scale testing with 1 000 $ m^{3} $ inactive simulated product and transport of this product down approx. 1 000 m production pipe into the 10 000 $ m^{3} $ prototype cavern at Asse. The caverns are constructed either conventionally, i.e. drilling and blasting or part-face heading machies or by solution mining in rock salt structures. This paper deals in particular with the drilling engineering, problems and solutions, and the storage area construction and sealing techniques.
Engineering geological and safety technological aspects for the final disposal of in situ-consolidated radioactive waste in hard rock and salt formations
Abstract In connection with its research and development work the Gesellschaft für Strahlen- und Umweltforschung mbH München (GSF) has successfully developed and tested methods for the final disposal of low and medium radioactive waste in 200 litre containers at the Asse salt mine. The low radioactive waste (LLW) was disposed of in chambers using various methods. The medium radioactive waste (MLW) was transported in single radiation shielding containers of almost 9 t weight into the former rocksalt mine. Subsequently the 200 l containers were lowered into the storage chamber. Analysis of past experience indicated that the storage methods as developed could be improved upon. Under the direction of the Reprocessing Project (PWA: Projekt Wiederaufarbeitung) in Kalrsruhe an R & D programme was started for the containerless final disposal of low and medium radioactive waste with subsequent consolidation in situ into a quasi-monolithic block. The process consists of the following steps: The low and medium radioactive waste produced in a reprocessing plant is processed into a 5 mm cement granulate. The hardened cement granulate is mixed in an aboveground installation with a cement slurry. The mixed product is dosed with additives and channelled under gravity down a vertical conduit of only 60 mm diameter into 75 000 $ cm^{3} $ caverns. Several other parties are involved in the project, which has been underway since 1976 in three main phases.Phase I Proof of technical feasibility in principlePhase II Preparation of a detailed technical conceptPhase III Large scale testing with 1 000 $ m^{3} $ inactive simulated product and transport of this product down approx. 1 000 m production pipe into the 10 000 $ m^{3} $ prototype cavern at Asse. The caverns are constructed either conventionally, i.e. drilling and blasting or part-face heading machies or by solution mining in rock salt structures. This paper deals in particular with the drilling engineering, problems and solutions, and the storage area construction and sealing techniques.
Engineering geological and safety technological aspects for the final disposal of in situ-consolidated radioactive waste in hard rock and salt formations
Quast, P. (Autor:in) / Hawickenbrauck, E. (Autor:in) / Schmidt, M. W. (Autor:in)
1986
Aufsatz (Zeitschrift)
Englisch
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