New encapsulation plant ceremony brought glamour and glitz to Olkiluoto

There was the festive feeling of a major sports event in the air on Monday 23 September at the ONKALO® site in Olkiluoto as the foundation stone of Posiva’s encapsulation plant was laid. The government’s address during the ceremony was brought by Prime Minister Antti Rinne. Posiva's major stakeholders and media were also present at the festive ceremony.

Prime Minister Antti Rinne participated in the laying of the foundation stone of Posiva's new encapsulation plant.

The afternoon ceremony continued into the evening with a larger stakeholder group in a party tent that had been raised on the ONKALO site. After the speeches, a panel discussion and dinner, guests were entertained by Janne Mustonen’s skilful juggling and a performance by Pete Parkkonen and the Popkorn band.

The festive ceremony climaxed on the dancefloor.
Earlier in the summer Posiva had announced the decision to implement the production facility designed for final disposal of spent fuel, consisting of the encapsulation plant and the underground final disposal repository.

PM Antti Rinne’s speech made cheeks glow

Prime Minister Rinne’s glowing speech to mark the occasion captured the importance of the occasion and was well received by the audience of guests.

The government’s address was brought by Prime Minister Antti Rinne.

- Posiva has demonstrated its ability to fulfil all of the safety and environmental requirements as well as find technologically viable solutions, all within the timeline set by the government. The fact that preparation for the final disposal of the spent fuel of TVO and Fortum has been systematically undertaken already for almost 40 years. This demonstrates a very strong will and capability to make this vision happen,” said Rinne.

According to Rinne the work for Posiva’s development and its advancement to the construction phase has required a tremendous amount of effort and multidisciplinary excellence.

- The know-how has been accumulated while in a pioneering role. The level of excellence achieved has also required a strong network, combining multidisciplinary topics and experts. In order to reach such a goal, it is not enough that the experts at their tasks are top class - they must also be bound together in order to achieve the common goal.

The foundation stone of Posiva’s encapsulation plant was laid on Monday 23 September at the ONKALO® site in Olkiluoto.

‘A significant step’

A similar message was transmitted also by Janne Mokka, the CEO of Posiva. According to Mokka, the laying of the foundation stone marks a significant step in the long preparation of the final disposal facility.

- This demonstrates that we are proceeding according to the plan jointly defined already in the 1980s. The entire nuclear sector in Finland can take pride in the fact that we have a solution for the spent nuclear fuel and that we can start the final disposal in a responsible way. The laying of the foundation stone can be a small step in terms of worksite progress but a big leap for final disposal, nuclear power and climate, Mokka said.

According to Mokka, the preparation for final disposal has now been taken to an implementation stage of facilities in Olkiluoto, which is unique on a global scale.

- I am particularly proud of Posiva’s personnel, who have world-class expertise in final disposal. Together with our competent partners we are now making history in our industry. Posiva and our partner network will have a lot of work and challenges to face in the next few years but together we have built a good base for ongoing cooperation and a successful project rollout in beginning the safe final disposal.


A significant project for Satakunta

The construction and engineering of the encapsulation plant and the final disposal repositories is a significant construction project for Satakunta. The cost estimate of the project totals about 500 million euros with an employment impact of around 2500 person years.

Present at the foundation stone ceremony, in addition to Rinne and Mokka, were the Chairman of the Municipal Board of Eurajoki Mr. Vesa Jalonen, the Chairperson of the Municipal Council Ms. Ilona Sjöman, the Chairman of Posiva’s Board of Directors Mr. Jarmo Tanhua (TVO), the CEO of Skanska Mr. Tuomas Särkilahti, as well as Posiva’s Board Members Ms. Satu Katajala (Fortum), Mr. Sasu Valkamo (Fortum) and Ms. Minna Laakso (PVO).

Text: Pasi Tuohimaa
Photos: Tapani Karjanlahti

Take a look at the festive foundation stone ceremony - see the YouTube-video!

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.


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 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.