Tight multilattices calculated by extended-cell cylindrization

M. Segev, S. Carmona

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Among the common features of advanced LWR concepts are the tightness of lattices and the symbiotic setting of different fuels. Such symbioses often come in the form of multilattices, whose numerically-repeated unit is a configuration of several pins, typically with one pin type at the center and pins of a second type surrounding the center pin. If this extended-cell (EC) unit is cylindricized, then a simple transport calculation of the unit will be possible. If the lattice of such units is tight, there is further an a priori reason to expect the cylindrization to introduce only a small distortion of the true neutron fluxes in the lattice. A strict numerical validation of the EC cylindrization approximation is impractical, but similar validations can be carried out for regular lattices, viewed as being made up of multicell units whose centers are moderators and whose peripheries are fuel pins. In these comparisons the EC cylindrization approximation gives good results.

Original languageEnglish
Pages (from-to)271-276
Number of pages6
JournalAnnals of Nuclear Energy
Issue number5
StatePublished - 1 Jan 1983

ASJC Scopus subject areas

  • Nuclear Energy and Engineering


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