Natural analogue study Ruprechtov (CZ) : an experience report / GRS, Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) mbH ; edited by: Ulrich Noseck (GRS), Václava Havlová (ÚJV) ; authors: Thomas Brasser, Wernt Brewitz, Radek Červinka, Václava Havlová, Ulrich Noseck František Woller ; this report was prepared under funding reference no. 02 E 10518 of the German Federal Ministry for Economic Affairs and Energy (BMWi) and contract no. SO2013-060 of the Czech Správa úložišt' radioaktivních odpadů (SÚRAO)