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Calculation of the Neutron Noise Induced By Periodic Deformations of A Large Sodium-Cooled Fast Reactor Core

F. Zylbersztejn, H. N. Tran and I. Pázsit, P. Filliatre, C. Jammes

Nuclear Science and Engineering / Volume 177 / Number 2 / Pages 203-218

June 2014

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The subject of this paper is the calculation of the neutron noise induced by small-amplitude stationary radial variations of the core size (core expansion/compaction, also called core flowering) of a large sodium-cooled fast reactor. The calculations were performed on a realistic model of the European Sodium Fast Reactor (ESFR) core with a thermal output of 3600 MW(thermal), using a multigroup neutron noise simulator. The multigroup cross sections and their fluctuations that represent the core geometry changes for the neutron noise calculations were generated by the code ERANOS. The space and energy dependences of the noise source represented by the core expansion/compaction and the induced neutron noise are calculated and discussed.

 
 
 
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