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Sensitivity and Uncertainty of the Neutronic Parameters of BWR Ringhals-1 TRACE/PARCS Stability Prediction
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Power Safety.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Power Safety.
2010 (English)In: International Conference on the Physics of Reactors 2010, PHYSOR 2010, 2010, 3320-3331 p.Conference paper, Published paper (Refereed)
Abstract [en]

Unstable behavior of Boiling Water Reactors (BWRs) is known to occur during operation at certain power and flow conditions. This paper reports the results of a preliminary investigation of the impact of uncertainty neutronic parameters on the prediction of the stability of the BWR within the framework of OECD Ringhals-1 stability benchmark. The time domain code TRACE/PARCS was used in the analysis and sensitivity calculations were performed for every neutronic parameter which was anticipated to affect the stability prediction of the reactor. The overall objective of the work here was to identify parameters most significantly affecting the stability phenomena in the Ringhals-1 stability benchmark. Using selected parameters, an uncertainty method based on the propagation of code input errors was used to obtain tolerance limits for the decay ratio and the frequency prediction. The scope of the uncertainty study reported in this paper was limited to the neutronic effects. Further studies will include other effects to include thermal-hydraulic parameters and modeling effects.

Place, publisher, year, edition, pages
2010. 3320-3331 p.
Keyword [en]
BWR stability, Sensitivity, Uncertainty
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-63003Scopus ID: 2-s2.0-79952431620OAI: oai:DiVA.org:kth-63003DiVA: diva2:481496
Conference
International Conference on the Physics of Reactors 2010, PHYSOR 2010; Pittsburgh, PA; 9 May 2010 through 14 May 2010
Note
QC 20120123Available from: 2012-01-21 Created: 2012-01-21 Last updated: 2012-01-23Bibliographically approved

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