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Haspel N.,E.ON | Fuchs M.,Westinghouse Electrical Germany GmbH | Kleen U.,Vattenfall | Niessen S.,AREVA | And 2 more authors.
ATW - Internationale Zeitschrift fur Kernenergie | Year: 2012

In view of tighter future budgets for public funding of nuclear research and development 8 large German firms and the universities and research centers joined in the Nuclear Technology Competence Association intend to strengthen their cooperation in common research projects so as to preserve competence. This move was initiated by the position paper by acatech - German Academy of Engineering Sciences, published in September 2011, which drew attention to the need to maintain and advance nuclear competence despite the decision to opt out of the use of nuclear power. In the light of the recommendations expressed in the position paper, the heads of research and development of the eight companies agreed on the key topics of future nuclear research as seen by industry under the auspices of the energy change. On this basis, the representatives of industry and public nuclear research supplemented the acatech paper by research topics of mutual interest which stand a chance of receiving grants-in-aid by the federal government within the framework of existing research programs. The execution of these research projects is to maintain and further develop nuclear competence in industry as well as in research and teaching.

Klute S.,Siempelkamp Nukleartechnik GmbH | Olaf Oldiges,WAK GmbH | Bohnstedt A.,Karlsruhe Institute of Technology | Baumann E.,AREVANP GmbH
ATW - Internationale Zeitschrift fur Kernenergie | Year: 2011

Summary report on 2 out of 12 sessions of the Annual Conference on Nuclear Technology held in Berlin, 17 to 19 May 2011: • Decommissioning of nuclear installations (Session 8), and • Radiation protection (Session 11). The session • Energy economics (Session 10), and • still not published reports on sections of other sessions will be covered in further issues of atw. Reports on the sessions • Reactor physics and methods of calculation (Session 1), • Thermodynamics and fluid dynamics (Session 2), • Safety of nuclear installations - methods, analysis, results (Session 3), • Front end of the fuel cycle, fuel elements and core components (Session 4), • Radioactive waste management, storage (Session 5), • Operation of nuclear installations (Session 6), • New build and innovations (Session 7), • Fusion technology (Session 9), and • Education, expert knowledge, knowhow-transfer (Session 12) have been covered in atw 7,8/9,10 and 11 (2011).

The corrosion protection of the internal space of thick-walled interim and permanent storage facility components, such as Castor® containers, are ensured nowadays by a galvanic nickel layer. The method has proved itself and protects the base material of the containers at the underwater loading in the Nuclear power station from a corrosive attack. Although, the galvanic nickel plating is a relatively time consuming method, it lasts for several days for each container, and is with a layer thickness of 1,000 μm also expensive. To develop an alternative, faster and more economical method, a BMBF research project named "-SHARK-protection by high velocity thermal spraying layers on thick-walled permanent and interim store components for the diminution of repairs, corrosion and costs" in cooperation between Siempelkamp Nukleartechnik GmbH and the Institute of Materials Science of the Leibniz University of Hanover was established to investigate the suitability of the high velocity oxy fuel spraying technology (HVOF) for the corrosion protective coating of thick-walled interim and permanent storage facility components. Since the permanent storage depot components are manufactured from cast iron with globular graphite, this material was exclusively used as a base material in this project. The evaluation of the economical features of the application of different nickel base spraying materials on cast iron substratum was in focus, as well as the scientific characterization of the coating systems with regard to the corrosion protective properties. Furthermore, the feasibility of the transfer of the laboratory results on a large industrial setup as well as a general suitability of the coating process for a required repair procedure was to be investigated. The preliminary examination program identified chromium containing spraying materials as successful. Results of the preliminary examination program have been used for investigations with the CASOIK demonstration container. The research results show that the quality of the corrosion protection with thermal spraying coatings is dependable on the process parameters. A follow-up project with the title "Qualification of corrosion protective layers thermally sprayed on thick walled container components, QUAKOS" has already started.

Quade U.,Siempelkamp Nukleartechnik GmbH | Kluth T.,Siempelkamp Nukleartechnik GmbH
Proceedings of the International Conference on Radioactive Waste Management and Environmental Remediation, ICEM | Year: 2011

Since more than 20 years the company Siempelkamp is deeply involved in the field of melting and recycling of radioactively contaminated metals from operation and decommissioning of nuclear installations across Europe. The experience of this long period shows clearly that only a combination of recycling inside the nuclear industry and release for reuse outside the nuclear market will generate the optimum results for the minimisation of radioactive waste volume. Final disposal volume is becoming more and more the status of an own resource within our nuclear business and should be handled very carefully in the future. The paper gives a compact overview about the impressive results of melting treatment, the current potential of the melting plant CARLA and about further developments. Copyright © 2011 by ASME.

After the extremely successful use of the multi-purpose lifting device and the reactor pressure vessel sealing head for the Brokdorf nuclear power plant, supplied by Siempelkamp Nukleartechnik in 2008 and 2009, a further contract was received in early 2010. E.ONKernkraft decided to also order a multi-purpose lifting device each for the power plants at Grafenrheinfeld and Unterweser from Siempelkamp. The important innovation of the Siempelkamp multi-purpose lifting device is that it is manufactured entirely from austenitic steel. This allows it to remain in its storage location on the retracted upper core grid (UCG) in the flooded reactor pool during the unloading of the fuel elements, while the fuel elements are being changed. The advantage here for the operator is that the fuel elements change is shortened even further, and this reduces costs! Saving time is also an important requirement for the RPV sealing head. For the Brokdorf nuclear power plant, Siempelkamp manufactured and supplied the RPV sealing head. A precondition of this order was a total realisation time of seven months and to save valuable time during the outage for the operating company. With a new sealing concept, a further innovation from Siempelkamp came to bear on this contract. It makes it possible to safely handle the RPV sealing head using the multi-purpose lifting device.

Within the 2-day workshop on "Preservation of Competence in Nuclear Technology," 31 young scientists competed for the "Competence Prize" awarded by Siempelkamp Nukleartechnik for the 14th time. They reported about their papers focusing on nuclear technology, reactor technology, innovative reactor systems, radioactive waste management, radiological protection and energy supply systems. The jury composed of Prof. J. Starflinger (Universität Stuttgart, IKE), Prof. M.K. Koch (Ruhr-Universität Bochum, LEE), and Dr. W. Steinwarz (Siempelkamp Nukleartechnik) assessed the advance compacts as well as the oral presentations. The winner of the 2012 Competence Prize is Dipl.-Ing.(M.S.) Thomas M. Fesich (University Stuttgart). Dr.-Ing. Oliver Czaikowski (Techn. University Clausthal) and Dipl.-Ing. Mario Kuschews-ki (Universität Stuttgart) won the second and third prizes.

Within the 2-day workshop on "Preservation of Competence in Nuclear Technology," 29 young scientists competed for the "Competence Prize" awarded by Siempelkamp Nukleartechnik for the 12th time. They reported about their term papers, diploma or doctoral theses focusing on reactor technology and reactor safety, the development of innovative reactor systems, and waste management. The jury composed of Prof. J. Starflinger (Universität Stuttgart, IKE), Prof. M. K. Koch (Ruhr-Universität Bochum, LEE), and Dr. W. Steinwarz (Siempelkamp Nukleartechnik) assessed the advance compacts as well as the oral presentations. The winner of the 2011 Competence Prize is Miriam Klöcker (Universität Bochum). Manuel Raqué (KIT-1KET) and Christian Ruff (Universität Heidelberg) won the second and third prizes.

Siempelkamp Nukleartechnik GMBH | Date: 2014-08-27

The object of the invention is a container cover (5) to close a filling opening (4) in a transport and/or storage container, in particular a temporary and/or permanent storage container for contaminated and/or activated substances, with at least two grooves (9) on the inside of the container cover (5) that are arranged at an interval to one another, with at least two gaskets (8) each arranged in a groove (9), and with a bypass device (18) to circulate (19) a gas, the bypass device (18) being connected with at least one groove (9) in such a way that an undefined gas volume (17) confined by the gasket (8) and the groove (9) can escape through the bypass device (18).

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