Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8066979 | Annals of Nuclear Energy | 2018 | 12 Pages |
Abstract
The results show that the thermal expansion of the core structural elements has a significant effect on the reactivity of these fast spectrum reactors. Moreover, it was found that during unprotected overpower transients the most important uncertain parameters are the Doppler coefficient and the fuel thermal expansion coefficient of reactivity. In addition, the large uncertainty of the positive coolant and cladding temperature coefficients of reactivity have a significant influence on the uncertainty of the calculated peak cladding temperature, especially in the case of unprotected loss of flow transients. The results imply that the uncertainty of some core safety parameters should be reduced. Lastly, the results adumbrate that additional safety shutdown systems are to be applied to mitigate the consequences of unprotected transients.
Related Topics
Physical Sciences and Engineering
Energy
Energy Engineering and Power Technology
Authors
Bálint Batki, András Keresztúri, István Panka,