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Moormann, Rainer [Contributor]; Atchison, Francis [Contributor]; Becker, Sabine [Contributor]; Berkvens, Paul [Contributor]; Bongardt, Klaus [Contributor]; Bongartz, Richard [Contributor]; Broome, Tim [Contributor]; Brücher, Heiner [Contributor]; Butzek, Michael [Contributor]; Carsughi, Flavio [Contributor]; Fabi, Peter [Contributor]; Findlay, David [Contributor]; Gardner, Ian [Contributor]; Giovannoni, Paul [Contributor]; Hanslik, Romuald [Contributor]; Heidenreich, Gerd [Contributor]; Herbst, Michael [Contributor]; Heuel-Fabianek, Burkhard [Contributor]; Hinssen, Hans-Klemens [Contributor]; Izmer, Andrej [Contributor]; Jahn, Wilfried [Contributor]; Kühn, Kerstin [Contributor]; Kühnlein, Winfried [Contributor]; Lennartz, Reinhard [Contributor]; [...]

Safety and Licensing of the European Spallation Source (ESS)

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  • Media type: E-Book; Report
  • Title: Safety and Licensing of the European Spallation Source (ESS)
  • imprint: Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, 2004
  • Published in: Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 4136, 58 p. (2004).
  • Language: English
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: As part ofpreparation of the ESS Technical Design Report, substantial effort was spent in 2001-2003 in examination of safety features and licensing requirements of ESS. This work is documented in the report in hand, being a stand-alone version ofthe safety chapter of the ESS Project Volume III Update Report, which is available soon on the internet: $\underline{http ://neutron.neutron-eu.net/n documentation/n reports/n ess reports and more/106}$ One main item in ESS safety work was shielding: General guidelinesfor ESS shielding design were developed. Ongoing work deals with shielding to the bottom, which is mainly determined by the activation of soil and ground water and migration of activity with the ground waterfow. The examinations on the nuclide vector in the ESS target were updated, which led to larger long-lived activities and radiotoxicities, compared to former ESS-results: Radioactive inventories and radiotoxicities of ESS with mercury targets are ofsimilar size as in a medium sized research reactor. Safety relevant advantages of a mercury target are its inert chemical character, avoiding oxidation problems in accidents and the easy decay heat removal as in liquid targets. On the other hand, the pronounced radiotoxicity (compared with Ta and W solid targets, where additionally the crystal lattice acts as barrier for activity release), the remarkable chemotoxicity, and the high volatility have to be considered as safety drawbacks of Hg-targets, which however can be overcome by adequate safety measures. Examinations on ESS decommissioning and disposal revealed, that liquid mercury targets have to be solidified prior to disposal. A preliminary safety study for ESS was performed on basis of SNS-studies. In comparing dose regulations and specific site conditions it was found, that tolerable radioactive releases in design basis accidents are at least 2 orders of magnitude smaller than those, still acceptable for SNS; one reasonfor this is, that ESS is to be build in an urban area and not like SNS deep inside a ...
  • Access State: Open Access