Gas Migration in EBS and Geosphere (GMT) - Introduction
A large amount of gas will be produced by anaerobic corrosion and microbial degradation of metallic materials and organic wastes disposed in the low/intermediate-level repository.
How will the gas migration through the Engineered Barrier System (EBS) influence its integrity ?
The GMT experiment considers the following events, which could influence the performance of the disposal system:
- Excess gas pressure could cause high stresses on the concrete silo and other EBS components leading to mechanical failures.
- Gas pressure could push contaminated water out from the waste packages and the disposal cavern into the geosphere.
- Escaping gas could transport volatile radionuclides through the EBS and the surrounding geological barrier.
- Assess the function of the whole system (EBS plus adjacent geosphere) with respect to gas migration.
- Evaluate models of gas migration through the engineered barriers and into the geosphere.
- Provide data for further improvement of the EBS design and emplacement procedures.
- Demonstrate the construction and EBS emplacement for an L/ILW silo-type repository.
Gas Migration in EBS and Geosphere (GMT)