Decommissioning / Dismantling

Reliable dismantling through quality and experience

Siempelkamp NIS has been working in the decommissioning and dismantling of nuclear power plants for more than 20 years. We carry out planning work or project management work for the operators and have particular experience in the safe and economical dismantling of large activated or strongly contaminated components. The scope of services ranges from planning the measures, through the conception and supply of equipment, to the actual dismantling and packaging of large components in line with final storage requirements.

The range of services comprises:

  • Project and cost management of decommissioning and dismantling tasks
  • Compilation of decommissioning concepts, tender documents and approval planning
  • Compilation of feasibility studies
  • Performance of environmental compatibility checks
  • Radiation protection planning and monitoring; clearance measurement and documentation
  • Disassembly of reactor core internals, steam generators and other primary circuit components
  • Development of individual dismantling technology, e.g. tools, waste management structures etc.
  • Construction, production, supply and assembly of tools, devices and equipment for the disassembly of contaminated/activated components as well as waste treatment facilities

The Siempelkamp NIS Technical Center in Alzenau, Germany – newly established in spring 2011 – provides ideal conditions for experimental purposes and set-ups: a facility to systematically analyze problems and challenges. It was the experiences of the Siempelkamp NIS expert team gathered from the successful disassembly of the Multi-purpose Research Reactor in Karlsruhe, Germany, the reactor pressure vessel of the Stade NPP in Germany and the ongoing project of disassembling the two RPVs at the ZION NPP in the USA, that led to the decision in autumn 2012 to test a new thermal cutting process: the plasma hot wire cutting!

Further information:
Plasma hot wire cutting: NIS Technical Center – a Siempelkamp competence location for process qualification during decommissioning

Dismantling of reactor components, particularly of the core internals, requires special solutions and techniques because of the particular radiological circumstances.

Further information:
Dismantling of Primary Components

In-situ-Gammaspektrometrie ist ein Entscheidungsmessverfahren, das der radiologischen Charakterisierung, Durchführung der Messungen, Auswertung, Analyse und Dokumentation der Ergebnisse zur Freigabe von Gebinden, Großkomponenten, Gebäudestrukturen und Gelände dient.

Further information:
In-situ-Gammaspektrometrie zur Freigabe von Gebinden, Großkomponenten, Gebäudestrukturen und Gelände

Im modernen RDB-Rückbau sind höchste Qualitätsmaßgaben unabdingbar sprich sehr zügige, sicherheits- und schutzzielorientierte Projektabläufe ohne Kontaminationsverschleppung oder Aerosol-Migration. E.ON Kernkraft legte diese Maßgaben bei der Auftragserteilung für den RDB-Rückbau im KKW Stade zugrunde.

Further information:
RDB Rückbau im Kernkraftwerk Stade: Innovative Umsetzung

When it comes to dismantling nuclear power plants cost efficient and environmentally friendly approaches are in the foreground. The expert team of Siempelkamp NIS GmbH has been rising to this challenge at the nuclear power plant Stade since February 2008.

Further information:
Decommissioning / Dismantling of the Stade NPP 2008

Since February of 2008 an expert team of Siempelkamp NIS Ingenieurgesellschaft mbH has been fully involved in a large-scale project at the nuclear power plant Stade. These specialists are planning the dismantling, disassembling and packing of the reactor pressure vessel including all peripheral internals at the plant.

Further information:
Decommissioning / Dismantling of the Stade NPP 2009

The two latest additions to Siempelkamp Engineering and Service GmbH have taken their first steps for a successful cooperation in the dismantling project of the nuclear power plant Stade. A team of experts from Siempelkamp NIS Ingenieurgesellschaft mbH has been involved with the dismantling, disassembling and packaging of the reactor pressure vessel including peripheral equipment at the nuclear power plant Stade since February 2008. In March 2009 Siempelkamp NIS commissioned Siempelkamp Krantechnik with the production, delivery and assembly of a gantry crane for the scheduled dismantling assignment in the control area of the nuclear power plant Stade.

Further information:
Decommissioning / Dismantling of the Stade NPP 2010

How can a nuclear facility be dismantled all the way to a greenfield without risking radiation exposure? For 15 years, Siempelkamp NIS Ingenieurgesellschaft has been involved in the dismantling of the experimental nuclear power plant of Kahl (Versuchsatomkraftwerk Kahl – VAK).

Further information:
Decommissioning / Dismantling of the research NPP to the status of "green field"

During the dismantling of the Zion NPP, the Siempelkamp experts from the fields of dismantling and decommissioning are working hand in hand. The various areas of expertise at Siempelkamp will be cooperating across the pond: Siempelkamp Nukleartechnik and Siempelkamp NIS Ingenieurgesellschaft on the German side, and the US subsidiary Siempelkamp Nuclear Services on the American side.

Further information:
Double record for Siempelkamp: Dismantling of the Zion NPP