16.06.2014 13:36

There’s a plan in place for each and every open issue

Posiva has detailed plans to solve all open issues relating to the final disposal concept. Furthermore, the company has prepared description documents for the testing and demonstration of the functionality of the disposal concept.

This spring, the plans and descriptions were collected in the Final Disposal Concept Development Programme submitted to the Radiation and Nuclear Safety Authority (STUK).

Tiina-Jalonen web
Tiina Jalonen, Posiva’s Senior Vice President, Development, coordinates the development programme.
“STUK wanted to assess the plans that we prepared to solve the open issues relating to Posiva’s final disposal concept in conjunction with their inspection of the construction licence application and so gain a better understanding of the feasibility and safety of the concept,” says Tiina Jalonen, Posiva’s Senior Vice President, Development.

The development programme lists the requirements placed on each factor involved in the final disposal process, such as spent fuel, the disposal canister, the buffer, the deposition tunnel backfill and end plug, and the rock facilities. The programme also presents plans for implementing full-scale testing in the underground research facility ONKALO.

The programme describes the issues that are still open as well as the tests to be performed in order to solve them.

“We made the description as detailed as possible at the current time. The development programme specifies what information we seek to gain with the future tests and what open issues that information will solve. At this stage, we have not even been able to confirm all the factors,” says Jalonen.

In addition to Posiva’s entire development department, other Posiva employees and external Posiva consultants took part in the preparation of the development programme.

STUK will assess the Final Disposal Concept Development Programme as part of the final disposal facility construction licence application submitted by Posiva. The development programme will provide STUK with additional information facilitating the processing of the construction licence application.

“The purpose of the development programme is to provide an even more solid base for the construction operations. We will continue reporting during the construction phase,” states Jalonen.

Demo3 web
A part of the full-scale testing programme, the POPLU test (full-scale plug test) is already underway in the underground research facility ONKALO.

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.