Südranden (Canton Schaffhausen) is one of the six potential siting regions for a geological repository confirmed by the Federal Council. It lies beneath a range of hills in the Tabular Jura and has a simple geological situation.
The geological siting area covers an area of around 24 square kilometres. The preferred host rock is the Opalinus Clay (with its confining units).
Understanding of the spatial conditions in the area is based on 2D seismic investigations and results from the nearby deep borehole at Benken. The siting area also lies in the Tabular Jura, partly beneath a range of hills, which is favourable in terms of the reliability of geological field investigations. The host rock shows quiet bedding, with no indication of any zones with increased tectonic dissection. The configuration, with strata dipping slightly to the south, thus offers flexibility in terms of the layout of the disposal caverns and tunnels.
Overall, the siting area is evaluated as being very suitable.
The underground installations for a deep geological repository for low- and intermediate-level waste in the Opalinus Clay could be constructed in the area shown in green.
Canton Schaffhausen: Beringen, Guntmadingen, Neuhausen am Rheinfall, Neunkirch, Wilchingen
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 Zürich: Benken, Dachsen, Feuerthalen, Flurlingen, Laufen-Uhwiesen, Marthalen, Rheinau, Trüllikon
Canton Schaffhausen: Gächlingen, Hallau, Löhningen, Oberhallau, Schaffhausen, Siblingen, Stetten, Trasadingen
Canton Thurgau: Schlatt
The area is located in the communities of Wilchingen and Hallau near an existing gravel-pit with an industrial plant. Access to the area is good. Given its location, the area can be seen from all sides and from the surrounding residential zones. The visual impact of the facility could be reduced by placing it in the gravel-pit.
The area lies in the community of Beringen near an existing gravel-pit with a concrete plant. Some construction measures would be necessary to provide access. The facility would not be visible from the village of Beringen due to the presence of existing industrial structures, but would be clearly visible from higher-lying residential areas.
The area lies in the community of Beringen near the refuse and sewage treatment plant. Some construction measures would be necessary to provide rail access. The area is mainly forested, which would necessitate clearing with replacement planting. Construction of the facility would make a side-hill cut necessary. The facility would be visible from Beringen.
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|At a media conference held by the Swiss Federal Office of Energy (SFOE), Nagra announces its proposals for potential siting areas for the surface facility. These will serve as the basis for discussions within the framework of regional participation.|
|The Federal Council decides to include the siting region Südranden in the further Sectoral Plan process. Stage 1 of the process is completed and Stage 2 initiated.|
|Start of the public consultation phase on Stage 1
of the site selection process for deep geological repositories. |
|The Swiss Federal Nuclear Safety Inspectorate (ENSI) approves Nagra's proposed siting regions following a review of safety and engineering feasibility aspects.|
|Announcement of the provisional planning perimeter by the Swiss Federal Office of Energy (SFOE).|
|Neuhausen am Rheinfall. Together with the ENSI and Nagra, the SFOE provides information on the proposals for geological siting regions.|
|Announcement by the SFOE of the proposed siting regions for deep geological repositories. |
|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).|
| 1988 – 1989||Siblingen borehole.|
|1988||Recognition 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.|