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001     820701
005     20210129224553.0
024 7 _ |a 2128/12745
|2 Handle
037 _ _ |a FZJ-2016-05970
041 _ _ |a German
088 1 _ |a Juel-3493
088 _ _ |a Juel-3493
|2 JUEL
100 1 _ |a Feuser, W.
|0 P:(DE-HGF)0
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245 _ _ |a Validierung der Modelle zur Lastabtragung durch Einbettung in Salzgrus LEISA
260 _ _ |a Jülich
|c 1998
|b Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
300 _ _ |a III, 106 p.
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336 7 _ |a TECHREPORT
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490 0 _ |a Berichte des Forschungszentrums Jülich
|v 3493
520 _ _ |a The current reference concept, i.e. the semihydrostatic emplacement model, for the final disposal of heat-generating high- and intermediate-level waste in deep vertical boreholes in salt provides for completely embedding each individual package in crushed salt. Load diversion by embedding in crushed salt ($\mathbf{LEISA}$ = $\mathbf{L}$astabtragung durch $\mathbf{EI}$nbettung in $\mathbf{SA}$lzgrus) will limit the stacking loads to the packages embedded. On behalf of the Federal Office for Radiation Protection (BfS - Bundesamt für Strahlenschutz), which is responsible for establishing the Gorleben planning, the Research Centre Jülich is engaged in studying theoretically as well as experimentally the applicability of this concept to a future repository (ILW(Q) und HTGR fuel element experimental programme). Two test stands with different geometrical dimensions were designed, manufactured, instrumented and put into operation for simulating a repository borehole. The pressure distributions were measured in the test stands and compared with those calculated, varying all decisive parameters. According to the measurements performed in this test programme, the predictions of the semihydrostatic model for a rough borehole wall surface examined in both test stands are in very good agreement with the experiments. The deviations between theory and experiment found for a smooth wall surface are presumably due to a still too unspecific determination of those crushed-salt parameters which are incorporated in the model calculations. The investigations carried out to date may be summarized as follows: load diversion by embedding in crushed salt is a highly efficient tool for limiting the stacking loads in vertical repository boreholes filled with crushed salt and waste packages.
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700 1 _ |a Vijgen, H.
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700 1 _ |a Barnert, E.
|0 P:(DE-HGF)0
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856 4 _ |u https://juser.fz-juelich.de/record/820701/files/J%C3%BCl_3493_Feuser.pdf
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