November 26, 2020 Other Closed Access

Di Nora, V. A.; Fridman, E.; Nikitin, E.; Bilodid, Y.; Mikityuk, K.

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  <dc:creator>Di Nora, V. A.</dc:creator>
  <dc:creator>Fridman, E.</dc:creator>
  <dc:creator>Nikitin, E.</dc:creator>
  <dc:creator>Bilodid, Y.</dc:creator>
  <dc:creator>Mikityuk, K.</dc:creator>
  <dc:date>2020-11-26</dc:date>
  <dc:description>This study presents an approach to the selection of optimal energy group structures for multi-group nodal diffusion analyses of Sodium-cooled Fast Reactor cores. The goal is to speed up calculations, particularly in transient calculations, while maintaining an acceptable accuracy of the results.
In Part I of the paper, possible time-savings due to collapsing of energy groups are evaluated using 24-group energy structure as a reference. Afterwards, focusing on energy structures with a number of groups leading to significant calculation speedups, optimal grid configurations are identified. Depending on a number of possible energy grid configurations to explore, the optimization is conducted by either a direct search or applying the simulated annealing method. Speedup and optimization studies are performed on a selected case of the Superphénix static neutronic benchmark by using the nodal diffusion DYN3D code. The results demonstrate noticeable improvements in DYN3D performance with a marginal deterioration of the accuracy.</dc:description>
  <dc:identifier>https://rodare.hzdr.de/record/584</dc:identifier>
  <dc:identifier>10.14278/rodare.584</dc:identifier>
  <dc:identifier>oai:rodare.hzdr.de:584</dc:identifier>
  <dc:relation>doi:10.1016/j.anucene.2021.108183</dc:relation>
  <dc:relation>url:https://www.hzdr.de/publications/Publ-31706</dc:relation>
  <dc:relation>url:https://www.hzdr.de/publications/Publ-31688</dc:relation>
  <dc:relation>url:https://www.hzdr.de/publications/Publ-32640</dc:relation>
  <dc:relation>doi:10.14278/rodare.583</dc:relation>
  <dc:relation>url:https://rodare.hzdr.de/communities/hzdr</dc:relation>
  <dc:relation>url:https://rodare.hzdr.de/communities/rodare</dc:relation>
  <dc:rights>info:eu-repo/semantics/closedAccess</dc:rights>
  <dc:subject>Serpent</dc:subject>
  <dc:subject>XS condensation</dc:subject>
  <dc:subject>energy structure optimization</dc:subject>
  <dc:subject>simulated annealing</dc:subject>
  <dc:title>Optimization of multi-group energy structures for diffusion analyses of sodium-cooled fast reactors assisted by simulated annealing – Part I: methodology demonstration</dc:title>
  <dc:type>info:eu-repo/semantics/other</dc:type>
  <dc:type>other</dc:type>
</oai_dc:dc>