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Jura-Südfuss

The region Jura-Südfuss (Cantons Solothurn, Aargau) has already been known for several years as a potential siting region for a deep geological repository. The siting region extends to the west of Olten on both sides of the cantonal boundary between Solothurn und Aargau.

The geological siting area covers an area of around 65 square kilometres. The host rock formations that come into question in the area are the Opalinus Clay (with its confining units) in the west and the Effingen Beds in the east.

 

Understanding of the spatial conditions in the area is based on 2D seismic investigations and partly on the results from the deep borehole at Schafisheim. The siting area lies close to the Folded Jura at the northern boundary of the Molasse Basin and is therefore partly subject to strong tectonic stress, which is expressed visibly in some of the regional structures. There are also indications of deformation outside these regional elements and large-scale quiet bedding is rare.

 

Overall, the siting area is evaluated as being suitable. 

 

The underground installations for a deep geological repository for low- and intermediate-level waste in the host rocks Opalinus Clay and Effingen Beds could be constructed in the area shown in green.

 

Siting communities:

Canton Solothurn: Däniken, Dulliken, Eppenberg-Wöschnau, Erlinsbach, Gretzenbach, Lostorf, Niedergösgen, Obergösgen, Olten, Schönenwerd, Starrkirch-Wil, Stüsslingen, Trimbach, Winznau

Canton Aargau: Aarau, Buchs, Gränichen, Hirschthal, Holziken, Kölliken, Muhen, Oberentfelden, Suhr, Unterentfelden

 

 

Planning perimeter for surface facilities


The required surface infrastructure (e.g. the portal of the access tunnel) could also be located outside this siting region. Working together with the affected Cantons and representatives from Germany, the Federal Government has defined planning zones (so-called planning perimeters) that include these additional areas. The planning perimeter extends up to 5 km around the geological siting region and should have good road or rail access. Mountainous and hilly zones and protected natural areas are restricting factors. The Federal Office of Energy announced the planning perimeters in provisional form on 10th December 2009; these were approved by the Federal Council on 30th November 2011.

 

Additional communities within the planning perimeter (besides the siting communities):
Canton Solothurn: Hägendorf, Kappel, Rickenbach, Walterswil, Wangen bei Olten

Canton Aargau: Aarburg, Erlinsbach, Hunzenschwil, Küttigen, Lenzburg, Oberkulm, Oftringen, Rothrist, Rupperswil, Safenwil, Schafisheim, Schöftland, Seon, Staffelbach, Staufen, Teufenthal, Uerkheim, Unterkulm
Clay-rich rock formations are particularly suitable for disposal of radioactive waste. For a low- and intermediate-level waste repository, the focus in the Jura-Südfuss region is on the Opalinus Clay. This formation is around 180 million years old; in the area it occurs at a depth of 350 to 700 metres below the surface and is between 80 and 100 metres thick. The potential host formation also includes the overlying Effingen Beds; these are 200 to 240 metres thick and are located 300 to 700 metres below the surface.
Geological profile from west to east through the siting region Jura-Südfuss. The grey arrows mark the Effingen Beds and the Opalinus Clay.
eJSF_Sammprofil

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  • The Federal Office of Energy (SFOE) is responsible for the sectoral plan process. Further information and contact persons for questions on the sectoral plan can be found under: www.bfe.admin.ch/radioaktiveabfaelle
  • The Swiss Federal Nuclear Safety Inspectorate (ENSI) (until 31 December 2008: HSK) is the regulatory authority for all questions relating to safety. Further information can be found under: www.ensi.ch
  • For questions to Nagra on your region:


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    Information by telephone
  • Philipp Senn

     
      Philipp Senn

     

      Tel. +41 (0)56 437 12 88

2011
(30th November)
The Federal Council decides to incorporate the siting region Jura-Südfuss into the Sectoral Plan process
  

2010

(1st September)

Start of the public consultation phase on Stage 1 of the site selection process for deep geological repositories. 
  

2010

(26th February)

The Swiss Federal Nuclear Safety Inspectorate (ENSI) approves Nagra's proposed siting regions following a review of safety and engineering feasibility aspects.
  

2009

(10th December)

Announcement of the provisional planning perimeter by the Swiss Federal Office of Energy (SFOE). 
  

2008

(17th December)

Aarau. Together with the ENSI and Nagra, the SFOE provides information on the proposals for geological siting regions.
  

2008

(4th December)

Niedergösgen. Together with the ENSI and Nagra, the SFOE provides information on the proposals for geological siting regions.
  

2008

(6th November)

Announcement by the SFOE of the proposed siting regions for deep geological repositories.
  

2008

(2. April)

The Federal Council approves the conceptual part of the sectoral plan for deep geological repositories.
  
1993
Completion of the site investigations for low- and intermediate-level waste, comparative assessment of the results for the four sites, proposal of the Wellenberg site.
  
1991 – 1992
Regional seismic investigations between the river Aare and Lake Constance (2D seismics).
  
1988Recognition by the Federal Council of the feasibility and safety of disposing of low- and intermediate-level waste in Switzerland.
  
1985
Submission of Project Gewähr to the federal authorities (demonstration of the feasibility and safety of disposing of all types of radioactive waste in Switzerland).
  
1982 – 1984
 Regional seismic investigations in the area Olten - Schaffhausen.