Implementation of CRAM depletion solver with external feed and improved accuracy into ORIGEN

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussavertaisarvioitu

Tutkijat

  • A. E. Isotalo
  • W. A. Wieselquist

Organisaatiot

  • Oak Ridge National Laboratory

Kuvaus

The ORIGEN module of SCALE has been updated with a Chebyshev Rational Approximation Method (CRAM) depletion solver. To allow the new solver to model external feed, a method has been developed for including a source term with polynomial time dependency to CRAM. It is also shown that while the accuracy of CRAM is only weakly affected by step lengths, it improves greatly over subsequent steps with equal lengths and coefficient matrices. An internal substepping method that allows this behavior to be efficiently exploited to improve the accuracy of CRAM is presented. In addition to being able to handle time-dependent feed rates and adjoint calculations, the new CRAM solver is generally faster and, even without substeps, more accurate than the original depletion solver of ORIGEN.

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoMathematics and Computations, Supercomputing in Nuclear Applications and Monte Carlo International Conference, M and C+SNA+MC 2015
TilaJulkaistu - 2015
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaMathematics and Computations, Supercomputing in Nuclear Applications and Monte Carlo International Conference - Nashville, Yhdysvallat
Kesto: 19 huhtikuuta 201523 huhtikuuta 2015

Conference

ConferenceMathematics and Computations, Supercomputing in Nuclear Applications and Monte Carlo International Conference
LyhennettäM and C+SNA+MC
MaaYhdysvallat
KaupunkiNashville
Ajanjakso19/04/201523/04/2015

ID: 17188972