By Roland Pusch
The publication describes and assesses present suggestions for long term disposal of hugely radioactive waste. varieties of rock are mentioned and assessed with appreciate to useful problems in development of a repository, and the potency in keeping apart radioactive waste. protection issues are most vital and are taken care of within the respective chapters and in a last, conclusive bankruptcy. price concerns and similar caliber issues are mentioned for the case of creating a virgin repository and repositories within the kind of switched over deserted mines.
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Additional info for Geological Storage of Highly Radioactive Waste: Current Concepts and Plans for Radioactive Waste Disposal
The net effect of this is a system of large discontinuities of 1st to 3rd orders appearing in a matrix of more or less regularly spaced discontinuities of higher orders. In principle, the structural build-up major discontinuities in crystalline or argillaceous rock masses can hence be generalized as in Fig. 3. The examples show that there is a core that is usually very heterogeneous and often clay-bearing in larger zones of 1st and 2nd orders while secondary breaks representing local “protuberances” extend into the surroundings similar to the splay fractures grown from discrete 4th order discontinuities.
We will come back to this issue in Chap. 6. Later, and in conjunction with assessing rock also from a construction point of view, and considering the importance of diffusive transport of chemical elements including radionuclides, the properties of discontinuities of higher orders were also found to be important so the whole spectrum of weaknesses is now being taken into consideration in working out conceptual models of the evolution of the near-field, including both rock and engineered barriers.
They were performed in SKB’s earliest underground laboratory at Stripa, some 200 km NW of Stockholm, Sweden. 5 kg Dynamex as bottom charge. This technique can be classified as “careful production-type blasting”. The aim was to get a basis for developing conceptual models of the EDZ, an early finding being that the degree of mechanical degradation varies along the length of a blasted tunnel because of the distribution of charge, a schematic illustration being that in Fig. 18.