Siempelkamp NIS offers a comprehensive range of services. This spectrum starts with engineering and includes components, vessels and containers, nuclear physics services, diagnostic systems, recycling and other services. Siempelkamp NIS is active in the areas of plant supply for newly built power plants, retrofitting and decommissioning of nuclear power plants. In addition, as a specialist in the design, construction, delivery and maintenance of highly automated bolt tensioners, we also offer our customers application-oriented solutions for opening and closing reactor pressure vessels and other primary circuit components in nuclear power plants.