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Testing methodologies for quantifying physical models uncertainties. A comparative exercise using CIRCE and IPREM (FFTBM)

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10.1016/j.nucengdes.2016.05.037
 
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hdl:2117/101182

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Freixa Terradas, JordiMés informacióMés informacióMés informació
Alfonso Prieto-Puga, Elsa de
Reventós Puigjaner, Francesc
Document typeArticle
Defense date2016-08-15
Rights accessRestricted access - publisher's policy
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
The increasing importance of Best-Estimate Plus Uncertainty (BEPU) analyses in nuclear safety and licensing processes have lead to several international activities. The latest findings highlighted the uncertainties of physical models as one of the most controversial aspects of BEPU. This type of uncertainties is an important contributor to the total uncertainty of NPP BE calculations. Due to the complexity of estimating this uncertainty, it is often assessed solely by engineering judgment. The present study comprises a comparison of two different state-of-the-art methodologies CIRCÉ and IPREM (FFTBM) capable of quantifying the uncertainty of physical models. Similarities and differences of their results are discussed through the observation of probability distribution functions and envelope calculations. In particular, the analyzed scenario is core reflood. Experimental data from the FEBA and PERICLES test facilities is employed while the thermal hydraulic simulations are carried out with RELAP5/mod3.3. This work is undertaken under the framework of PREMIUM (Post-BEMUSE Reflood Model Input Uncertainty Methods) benchmark.
CitationFreixa, J., De Alfonso, E., Reventós, F. Testing methodologies for quantifying physical models uncertainties. A comparative exercise using CIRCE and IPREM (FFTBM). "Nuclear engineering and design", 15 Agost 2016, vol. 305, p. 653-665. 
URIhttp://hdl.handle.net/2117/101182
DOI10.1016/j.nucengdes.2016.05.037
ISSN0029-5493
Publisher versionhttp://www.sciencedirect.com.recursos.biblioteca.upc.edu/science/article/pii/S0029549316301704
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  • Departament de Física - Articles de revista [1.714]
  • ANT - Advanced Nuclear Technologies Research Group - Articles de revista [113]
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