TY - JOUR
T1 - Acceleration of fission source convergence in the Serpent 2 Monte Carlo code using a response matrix based solution for the initial source distribution
AU - Leppänen, Jaakko
N1 - Funding Information:
This work was carried out within the McSAFE project which is receiving funding from the Euratom research and training programme under grant agreement No 755097 .
Publisher Copyright:
© 2019 Elsevier Ltd
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/6
Y1 - 2019/6
N2 - This paper presents a new response matrix based solver implemented in the Serpent 2 Monte Carlo code for the purpose of producing an improved initial guess to accelerate source convergence in criticality source simulations. The solver obtains coupling coefficients required for the response matrix solution from Monte Carlo simulations, and provides a spatial distribution that approximates the converged fission source. The implemented methodology is demonstrated by single-assembly and full-core PWR calculations. The results show that the improved initial guess leads to faster source convergence in terms of both inactive cycles and overall running time.
AB - This paper presents a new response matrix based solver implemented in the Serpent 2 Monte Carlo code for the purpose of producing an improved initial guess to accelerate source convergence in criticality source simulations. The solver obtains coupling coefficients required for the response matrix solution from Monte Carlo simulations, and provides a spatial distribution that approximates the converged fission source. The implemented methodology is demonstrated by single-assembly and full-core PWR calculations. The results show that the improved initial guess leads to faster source convergence in terms of both inactive cycles and overall running time.
KW - Criticality source simulation
KW - Monte Carlo
KW - Response matrix method
KW - Serpent 2
KW - Source convergence acceleration
UR - http://www.scopus.com/inward/record.url?scp=85059481944&partnerID=8YFLogxK
U2 - 10.1016/j.anucene.2018.12.044
DO - 10.1016/j.anucene.2018.12.044
M3 - Article
AN - SCOPUS:85059481944
VL - 128
SP - 63
EP - 68
JO - Annals of Nuclear Energy
JF - Annals of Nuclear Energy
SN - 0306-4549
ER -