European supercritical water cooled reactor

T. Schulenberg (Corresponding Author), J. Starflinger, P. Marsault, D. Bittermann, C. Maráczy, E. Laurien, J.A. Lycklama à Nijeholt, H. Anglart, M. Andreani, M. Ruzickova, Aki Toivonen

    Research output: Contribution to journalArticleScientificpeer-review

    66 Citations (Scopus)


    The High Performance Light Water Reactor (HPLWR), how the European Supercritical Water Cooled Reactor is called, is a pressure vessel type reactor operated with supercritical water at 25 MPa feedwater pressure and 500 °C average core outlet temperature. It is designed and analyzed by a European consortium of 10 partners and 3 active supporters from 8 Euratom member states in the second phase of the HPLWR project. Most emphasis has been laid on a core with a thermal neutron spectrum, consisting of small fuel assemblies in boxes with 40 fuel pins each and a central water box to improve the neutron moderation despite the low coolant density. Peak cladding temperatures of the fuel rods have been minimized by heating up the coolant in three steps with intermediate coolant mixing. The containment design with its safety and residual heat removal systems is based on the latest boiling water reactor concept, but with different passive high pressure coolant injection systems to cause a forced convection through the core. The design concept of the steam cycle is indicating the envisaged efficiency increase to around 44%. Moreover, it provides the constraints to design the components of the balance of the plant. The project is accompanied by numerical studies of heat transfer of supercritical water in fuel assemblies and by material tests of candidate cladding alloys, performed by the consortium and supported by additional tests of the Joint Research Centre of the European Commission. Besides the scientific and technical progress, the HPLWR project turned out to be most successful in training the young generation of nuclear engineers in the technologies of light water reactors. More than 20 bachelor or master theses and more than 10 doctoral theses on HPLWR technologies have been submitted at partner organizations of this consortium since the start of this project.
    Original languageEnglish
    Pages (from-to)3505-3513
    Number of pages9
    JournalNuclear Engineering and Design
    Issue number9
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed
    Event7th European Commission conference on Euratom research and training in reactor systems (Fission Safety 2009)
    - Prague, Czech Republic
    Duration: 22 Jun 200924 Jun 2009


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