Skip to main content

Prototype repository - full scale testing of the KBS-3 concept for high-level radioactive waste

Objective

SKB's reference concept for deep disposal of spent nuclear fuel, the KBS-3 system, has several features in common with other European concepts and full-scale testing is therefore of great value. Components of this system have been thoroughly investigated but the Prototype Repository is the first full scale application. T he Prototype Repository will be conducted at the AEspoe Hard Rock Laboratory (AEHRL) as an integrated test focusing on EBS performance but comprising also canister deposition, backfilling and plug construction. It offers a number of possibilities to compare test results with models and assumptions and also to develop engineering standards and quality assurance methods. The co-operative work aims at accomplishing confidence building as to the capability of constructing safe repositories and predicting EBS performance also for somewhat different conditions than those in the AEHRL.
Project´s actual:
- Completion of a test set-up with up to six canisters with heaters in deposition holes;
- Preparation of an operating monitoring system covering THM processes in buffer, backfill and rock, and gas and water sampling;
- Results of predictive modelling for:
- THM processes in bentonite buffer and bentonite-based backfill during saturation;
- heat distribution in the buffer and surrounding rock;
- development of stresses in the rock mass;
- development of piezometric heads in the rock mass;
- movement of canisters (heaters) in the buffer;
- chemical changes in the buffer (salt enrichment, precipitations), (THC);
- microbial effects (migration, attack on minerals), (THMB).

Tentative comparison between the readings from the first two years after commissioning and the results from predictive modelling.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

SVENSK KAERNBRAENSLEHANTERING AB
Address
Brahegatan 47
5864 Stockholm
Sweden

Participants (12)

ASSOCIATION FOR RESEARCH AND INDUSTRIAL DEVELOPMENT OF NATURAL RESOURCES
Spain
Address
Alenza 1
28003 Madrid
CLAY TECHNOLOGY AB
Sweden
Address
Ideon Research Centre Ole Roemers Vaeg 12D
Lund
EMPRESA NACIONAL DE RESIDUOS RADIOACTIVOS S.A.
Spain
Address
7,Emilio Vargas 7
28043 Madrid
Federal Institute for Geosciences and Natural Resources
Germany
Address
Stilleweg 2
30655 Hannover
GEO DEVELOPMENT AB
Sweden
Address
Ideon Research Centre
223 70 Lund
INTERNATIONAL CENTRE FOR NUMERICAL METHODS IN ENGINEERING
Spain
Address
S/n,gran Capitan S/n, Campus Norte Upc, Edificio C1
08034 Barcelona
JAPAN NUCLEAR CYCLE DEVELOPMENT INSTITUTE
Japan
Address
Muramatsu 4-49
319-1184 Tokai Town, Ibaraki Pref.
NATIONAL RADIOACTIVE WASTE MANAGEMENT AGENCY OF FRANCE
France
Address
Rue Jean Monnet 1-7
92298 Chatenay Malabry
POSIVA OY
Finland
Address
Töölönkatu 4
00100 Helsinki
SWECO VIAK AB
Sweden
Address
Gjoerwellsgatan 22
10026 Stockholm
TECHNICAL RESEARCH CENTRE OF FINLAND
Finland
Address
1,Sahkomiehentie 3
02044 Espoo
UNIVERSITY OF WALES CARDIFF
United Kingdom
Address
Queen's Buildings, The Parade, Newport Road
CF24 3TB Cardiff