Media

News

31.12.2012 12:48

Joint development of plugging and sealing technology for geological disposal facilities - the DOPAS Project

Launch of European-wide cooperation on plugging and sealing technology


Fourteen nuclear waste management organisations and research institutes from eight European countries are participating in a technology development project for testing plugging and sealing systems for geological disposal facilities for radioactive waste - the DOPAS project ("Full-Scale Demonstration Of Plugs And Seals"). The project is built around a set of full-scale underground demonstrations, laboratory experiments, and performance assessment studies.


The project budget is €15.7 million, and is jointly funded by the Euratom's Seventh Framework Programme (€8.7 million) and European nuclear waste management organisations. The project is running in the period September 2012 – August 2016, and is being coordinated by Posiva Oy, a nuclear waste management company in Finland.


The project will compile the design basis of plugs and seals, develop new technology for plug and seal materials and for the assembly and construction of plug and seal systems, carry out full or partial design of the systems, and perform five full-scale plug and seal tests. The tests will be carried out in research facilities representative of varying geological environments in Finland, France, the Czech Republic, Sweden and Germany. In addition, the performance of the plugs and seals will be assessed and compared to design requirements. A further task is to inform the wider radioactive waste management community about the work and results of DOPAS, via attendance at international scientific meetings and project publications.


In 2016, the project team will organise an international seminar on plugging and sealing technology for geological disposal of radioactive waste.


The impetus to the cooperation comes from the Strategic Research Agenda of the Implementing Geological Disposal of Radioactive Waste - Technology Platform (IGD-TP).


Plug
As example Posiva's Deposition tunnel plug experiment in ONKALO underground rock characterization facility in Olkiluoto, Finland



 

”As part of the DOPAS project, Posiva will perform the deposition tunnel's full-scale plugging test in the underground rock characterization facility, ONKALO, in Finland," says Posiva's Johanna Hansen, coordinator of the DOPAS project. The plug design has already started, and the construction will be carried out in 2013-2014. Other Finnish project partners are VTT and B+Tech.

"Excavation of the plug area with wire sawing is also a new and innovative task for Posiva as part of the deposition tunnel plug construction test. A low-pH concrete, especially developed for geological disposal conditions, will be used for the plugging structure. The reason for using this type of special concrete is to maintain the chemical conditions of the underground geological environment as natural as possible," says Hansen.

 
Johanna Hansen äspö-juttuun web
Johanna Hansen from Posiva coordinates the DOPAS project.
Dopas logoEuratom-www

Return to headlines



Share article:
This website stores cookies on your computer. These cookies are used to improve our website and provide more personalised services to you.
Close

Cookies

To make this site work properly, we sometimes place small data files called cookies on your device. Most big websites do this too.

1. What are cookies?

A cookie is a small text file that a website saves on your computer or mobile device when you visit the site. It enables the website to remember your actions and preferences (such as login, language, font size and other display preferences) over a period of time, so you don’t have to keep re-entering them whenever you come back to the site or browse from one page to another.

2. How do we use cookies?

A number of our pages use cookies to remember your actions and preferences (such as login, language, font size and other display preferences.)

Also, some videos embedded in our pages use a cookie to anonymously gather statistics on how you got there and what videos you visited.

Enabling these cookies is not strictly necessary for the website to work but it will provide you with a better browsing experience. You can delete or block these cookies, but if you do that some features of this site may not work as intended.

The cookie-related information is not used to identify you personally and the pattern data is fully under our control. These cookies are not used for any purpose other than those described here.

3. How to control cookies

You can control and/or delete cookies as you wish – for details, see aboutcookies.org. You can delete all cookies that are already on your computer and you can set most browsers to prevent them from being placed. If you do this, however, you may have to manually adjust some preferences every time you visit a site and some services and functionalities may not work.

Close