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StandAG Standortauswahlgesetz
Öffentliches RechtVerwaltungsrechtBesonderes Verwaltungsrecht
Energie- & Umweltrecht
Der Transport radioaktiver Stoffe durch Grundwasserbewegungen und Diffusion im einschlusswirksamen Gebirgsbereich soll so gering wie möglich sein. Bewertungsrelevante Eigenschaften dieses Kriteriums sind die im einschlusswirksamen Gebirgsbereich vorherrschende Grundwasserströmung, das Grundwasserangebot und die Diffusionsgeschwindigkeit entsprechend der unten stehenden Tabelle. Solange die entsprechenden Indikatoren nicht standortspezifisch erhoben sind, kann für die Abwägung das jeweilige Wirtsgestein als Indikator verwendet werden.
| Bewertungsrelevante Eigenschaft des Kriteriums | Bewertungsgröße beziehungsweise Indikator des Kriteriums | Wertungsgruppe | ||
| günstig | bedingt günstig | weniger günstig | ||
| Grundwasserströmung | Abstandsgeschwindigkeit des Grundwassers [mm/a] | < 0,1 | 0,1 – 1 | > 1 |
| Grundwasserangebot | Charakteristische Gebirgsdurchlässigkeit des Gesteinstyps [m/s] | < 10–12 | 10–12– 10–10 | > 10–10 |
| Diffusionsgeschwindigkeit | Charakteristischer effektiver Diffusionskoeffizient des Gesteinstyps für tritiiertes Wasser (HTO) bei 25 °C [m2/s] | < 10–11 | 10–11– 10–10 | > 10–10 |
| Diffusionsgeschwindigkeit bei Tonstein | Absolute Porosität | < 20 % | 20 % – 40 % | > 40 % |
| Verfestigungsgrad | Tonstein | fester Ton | halbfester Ton | |
Quelle: BMJ
Import: