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Abstract

This report addresses the topic of incorporation of passive safety systems, as currently proposed for advanced reactor designs, into future Probabilistic Safety Assessment (PSA) studies of accordingly designed future nuclear power plants and discusses, for the different degrees of passiveness of such systems, some basic problems with regard to numerical estimation of their reliabilities and inclusion of such estimates in plant-specific PSA models.
Further RTD needs to overcome these problems for practical applications are identified. The relevance of this topic is due to the strong role which PSA is likely to play in future for safety verification of advanced reactor designs, such as Generation IV, after it has become international consensus among safety experts in the last years that passive safety systems do not have a "quasi-zero" failure probability, as was previously often claimed (unreliabilities resulting from the case studies performed are in the order of 10{-3}-10{-2}).

Additional information

Authors: BOLADO LAVÍN R, European Commission, Joint Research Centre, Institute for Energy, Petten (NL);KIRCHSTEIGER C, European Commission, Joint Research Centre, Institute for Energy, Petten (NL);BOLADO LAVIN R, European Commission, Joint Research Centre, Institute for Energy, Petten (NL)
Bibliographic Reference: EUR 21303 EN (2004), 23 pp. Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9893 Fax: +39 033278 5409 E-mail: jrc-publications-office@ec.europa.eu or Bruxelles (BE) Tel: +32 2 295 76 24 Fax: +32 2 299 63 22
Record Number: 200517870 / Last updated on: 2005-01-25
Category: PUBLICATION
Original language: en
Available languages: en
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