Design and performance assessment of engineered barrier systems in a salt repository for HLW/SNF

BGE TECHNOLOGY GmbH (BGE TEC) and Sandia National Laboratories (SNL) developed and jointly tested a methodology for the safety assessment of engineered barrier systems (EBS) for a high-level waste/spent nuclear fuel (HLW/SNF) repository in salt. Long-term isolation in such a repository is provided b...

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Bibliographic Details
Published inThe Mechanical Behavior of Salt X pp. 272 - 282
Main Authors Simo, Eric, Matteo, Edward N., Kuhlman, Kristopher L., Jayne, Richard S., Vargas, Paola León, Herold, Philipp, Lommerzheim, Andree, Keller, Andreas
Format Book Chapter
LanguageEnglish
Published CRC Press 2022
Edition1
Subjects
Repository System
Engineered Barrier
Radionuclide Transport
Overburden
DIN En
HLW
Geochemical Evolution
Reference Scenario
Integrated Performance Assessment
EBS
Geotechnical Barriers
Doe
Integrity Assessment
Thermal Mechanical Model
BGE
Maximum Temperature Increase
Repository Mine
Crushed Salt Backfill
Thermal Evolution
Thermal Mechanical Simulation
Generic Repository
FEP
PA
Salt Repository
Verification Concept
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Summary:BGE TECHNOLOGY GmbH (BGE TEC) and Sandia National Laboratories (SNL) developed and jointly tested a methodology for the safety assessment of engineered barrier systems (EBS) for a high-level waste/spent nuclear fuel (HLW/SNF) repository in salt. Long-term isolation in such a repository is provided by a multi-barrier system including natural and engineered barriers. The salt provides the natural barrier, whereas the engineered barriers are different sealing components installed in the repository. The developed methodology is tested via a generic repository concept that is situated in a generic bedded salt formation. Based on this, a global model was generated, including relevant stratigraphic layers and underground openings of the repository. BGE TEC used this model to perform the integrity assessment of the shafts and drift sealings as main parts of the EBS. Simultaneously, SNL conducts the radiological performance assessment (PA). Both parts interact by an optimization of the EBS based on PA simulations and EBS-parameters. For this purpose, sensitivity analyses were incorporated into the PA simulation. This contribution presents the modeling and methodological approach used for BGE TEC and SNL for the design and performance assessment of EBS.
ISBN:9781032282213
1032282215
1032282207
9781032282206
DOI:10.1201/9781003295808-26