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Analysis of the OECD/NRC Oskarshamn-2 BWR stability benchmark
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Power Safety.
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2014 (English)In: Annals of Nuclear Energy, ISSN 0306-4549, E-ISSN 1873-2100, Vol. 67, 4-12 p.Article in journal (Refereed) Published
Abstract [en]

On February 25, 1999, the Oskarshamn-2 NPP experienced a stability event which culminated in diverging power oscillations. The event was successfully modeled by the TRACE/PARCS coupled system code, and further uncertainty analysis of the event is described in this paper. The results show very good agreement with the plant data, capturing the entire behavior of the transient including the onset of instability, growth of the oscillations, and oscillation frequency. This provides confidence in the prediction of other parameters which are not available from the plant records. The event provides coupled code validation for a challenging BWR stability event, which involves the accurate simulation of neutron kinetics (NK), thermal-hydraulics (TH), and TH/NK coupling. The success of this work has demonstrated the ability of the 3-D coupled systems code TRACE/PARCS to capture the complex behavior of BWR stability events. The problem was released as an international OECD/NEA benchmark, and it is the first benchmark based on measured plant data for a stability event with a DR greater than one.

Place, publisher, year, edition, pages
2014. Vol. 67, 4-12 p.
Keyword [en]
Oskarshamn-2, BWR stability, Stability event, TRACE/PARCS, Code validation, Coupled code
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-144525DOI: 10.1016/j.anucene.2013.09.028ISI: 000333512200002ScopusID: 2-s2.0-84894655926OAI: diva2:714555
Scientific Workshop on Advanced Stability Analysis for Nuclear Reactors, 2012, Dresden, Germany

QC 20140428

Available from: 2014-04-28 Created: 2014-04-24 Last updated: 2014-04-28Bibliographically approved

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Gajev, IvanMa, Weimin
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