Impact of nuclear data uncertainties on neutronics parameters of MYRRHA/XT-ADS

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A flexible fast spectrum research reactor MYRRHA able to operate in subcritical (driven by a proton accelerator) and critical modes is being developed in SCK∙CEN. In the framework of IP EUROTRANS programme the XT-ADS model has been investigated for MYRRHA. In this study, the sensitivity and uncertainty analysis was performed to comprehend the reliability of the XT-ADS neutronics design. The calculated sensitivity coefficients for neutronics parameters varied significantly between calculation models. The uncertainties deduced from the covariance data strongly depend on the original covariance data. The calculated nuclear data uncertainties could not meet the target accuracy. To improve uncertainties, the integral experiments in adequate conditions are expedient.


Original languageEnglish
Title of host publicationNuclear Measurements, Evaluations and Applications - NEMEA-6
Place of PublicationParis, France
Publication statusPublished - 11 Aug 2011
EventNuclear measurements, Evaluations and Applications - NEMEA-6 - Krakow, Poland
Duration: 25 Oct 201028 Oct 2010


ConferenceNuclear measurements, Evaluations and Applications - NEMEA-6


  • nuclear data, uncertainty, covariance matrix

ID: 238625