Generic HLW Repository In Bedded Salt In Germany: Emplacement Technologies and Repository Designs - 18288
- DBE TECHNOLOGY GmbH, Eschenstr. 55, D-31224 Peine (Germany)
- Bundesanstalt fuer Geowissenschaften und Rohstoffe (BGR), Stilleweg 2, D- 30655 Hannover (Germany)
- Gesellschaft fuer Anlagen- und Reaktorsicherheit (GRS) GmbH, Theodor-Heuss-Str. 4, D-38122 Braunschweig (Germany)
- Institut fuer Gebirgsmechanik GmbH, Friederikenstrasse 60, D-04279 Leipzig (Germany)
In Germany, a new site selection act for a repository for HLW and SNF entered into force in July 2013 and was amended in spring 2017 [1]. It stipulates that the safety of repository systems for heat-generating radioactive waste and spent nuclear fuel in different host rock formations be compared. This requires that generic repository concepts and adequate safety- and safety demonstration concepts for all potential host rock formations in Germany (salt, clay and crystalline rock) exist. For several decades, development of disposal concepts and safety analyses for a repository in a salt dome was prioritized while repository concepts for clay and crystalline rock have been taken into account for two decades only. So far, bedded salt formations have not been the subject of comparative investigations. Thus, in summer 2015, the Federal Ministry for Economic Affairs and Energy (BMWi) launched the R and D project KOSINA to develop repository designs and carry out safety analyses for different emplacement alternatives in a generic bedded salt formation and a generic salt pillow. KOSINA is an acronym for 'Concept development for a generic repository for heat-generating waste in bedded salt formations in Germany as well as development and testing of a safety and demonstration concept'. Together with its partners BGR, GRS, and IfG, DBE Technology GmbH has successfully carried out an almost three years lasting scientific programme, which will be concluded in April 2018. The core areas of the programme are the development of generic geologic models, including derivation of model parameters, the development of a safety and safety demonstration concept, the development of technical repository designs for four different emplacement alternatives, the analysis of geomechanical integrity, the evaluation of operational safety as well as the analysis of radiological consequences. An interim report, which compiles the basic data of the waste inventory, the repository design requirements, the data basis for geologic model developments, and the outline of a safety and safety demonstration concept, was already published in February 2016. The main achievements of the R and D project KOSINA are the development of four different repository designs, two per each generic geologic model (flat-bedded salt, salt pillow) based on thermomechanical calculations. This includes the implementation of a safety concept that provides containment of the radioactive materials with regard to the technical designs of waste packages, transport and emplacement technologies, and backfilling and sealing concepts. Furthermore, the integrity of the geologic barriers could be demonstrated for all four repository designs, and the long-term predictions showed no radiological releases during the demonstration period of one million years. (authors)
- Research Organization:
- WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)
- OSTI ID:
- 22975433
- Report Number(s):
- INIS-US-20-WM-18288; TRN: US21V0247015475
- Resource Relation:
- Conference: WM2018: 44. Annual Waste Management Conference, Phoenix, AZ (United States), 18-22 Mar 2018; Other Information: Country of input: France; 7 refs.; Available online at: https://www.xcdsystem.com/wmsym/2018/index.html
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BACKFILLING
CLAYS
CONTAINMENT
FEDERAL REPUBLIC OF GERMANY
FORECASTING
GEOLOGIC MODELS
GESELLSCHAFT FUER ANLAGEN- UND REAKTORSICHERHEIT
HIGH-LEVEL RADIOACTIVE WASTES
IGNEOUS ROCKS
IMPLEMENTATION
METAMORPHIC ROCKS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE STORAGE
SAFETY ANALYSIS
SITE SELECTION
SPENT FUELS