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- 저자 : M. Hursin (검색결과 1 건)
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A. Dokhane,A. Vasiliev,M. Hursin,D. Rochman,H. Ferroukhi 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.5
The aim of this paper is to assess the reliability and accuracy of the PSI standard method, used in manyprevious works, for the quantification of ND uncertainties in the SPERT-III RIA transient, by quantifyingthe discrepancy between the actual inserted reactivity and the original static reactivity worth and theirassociated uncertainties. The assessment has shown that the inherent S3K neutron source renormalization scheme, introduced before starting the transient, alters the original static reactivity worth of thetransient CR and reduces the associated uncertainty due to the ND perturbation. In order to overcomethese limitations, two additional methods have been developed based on CR adjustment. The comparative study performed between the three methods has showed clearly the high sensitivity of the obtained results to the selected approach and pointed out the importance of using the right procedure inorder to simulate correctly the effect of ND uncertainties on the overall parameters in a RIA transient. This study has proven that the approach that allows matching the original static reactivity worth andstarting the transient from criticality is the most reliable method since it conservatively preserves theeffect of the ND uncertainties on the inserted reactivity during a RIA transient.
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