A large scale in situ demonstration test for repository sealing in an argillaceous host rock - phase II

Objective

An essential item for the long-term safety of high-level waste underground repositories is the backfilling and sealing of access shafts and connection galleries. The main objective of RESEAL II is to demonstrate on a representative scale that the sealing of a shaft i.e. the "experimental" shaft of the HADES underground laboratory, with a low permeability powder/pellets mixture of bentonite avoids preferential migration of water, gas or radionuclides either through the seal of through the excavation disturbed zone around it. The mechanical stability of the seal under accidental overpressure conditions will be also tested. A tracer diffusion in the host clay formation around the seal will allow to study, by modelling, the migration parameters of the excavation disturb ed zone. Hydro-mechanical models will be applied for the interpretation of the test results and consequently to demonstrate our understanding of the seal behaviour.

Fields of science

• natural sciences › chemical sciences › nuclear chemistry › radiation chemistry

Programme(s)

• FP5-EAECTP C - Research and training programme (Euratom) in the field of nuclear energy (1998 to 2002)

Topic(s)

• 2.1.2.-2.1.3 - Repository technology

Call for proposal

Data not available

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

BELGIAN NUCLEAR RESEARCH CENTRE

Address

200,boeretang 200
2400 Mol
Belgium

Participants (4)

CENTRO DE INVESTIGACIONES ENERGETICAS, MEDIAMBIENTALES Y TECNOLOGICAS

Spain

Address

22,avenida Complutense 22
28040 Madrid

COMMISSARIAT A L'ENERGIE ATOMIQUE

France

Address

Centre D'etudes De Saclay
91191 Gif Sur Yvette

NATIONAL RADIOACTIVE WASTE MANAGEMENT AGENCY OF FRANCE

France

Address

Rue Jean Monnet 1-7
92298 Chatenay Malabry

UNIVERSITAT POLITECNICA DE CATALUNYA

Spain

Address

S/n,jordi Girona 1-3, Modul D2, Campus Nord
08034 Barcelona