Development of a variance reduction scheme in the serpent 2 Monte Carlo code

Jaakko Leppänen (Corresponding author), Tuomas Viitanen, Olli Hyvönen

    Research output: Contribution to conferenceConference articleScientificpeer-review

    Abstract

    This paper presents the weight-window based variance reduction scheme recently implemented in the Serpent 2 Monte Carlo particle transport code. Importances used for forming the weight-window boundaries are obtained from a super-imposed mesh, which can be produced using external calculation tools or a built-in light-weight solver based on the response-matrix method. The methodology is introduced and demonstrated by two examples: 1) radiation shielding calculation in a spent fuel transport cask with weight-window mesh produced by SCALE / MAVRIC, and 2) ex-core neutron dosimetry calculation with the internal light-weight solver. In both cases the use of variance reduction results in orders of magnitude increase in computational performance without introducing any biases in the results. The work is part of an on-going effort to expand the use of Serpent from its traditional applications in reactor physics to new fields, such as radiation transport and fusion neutronics.
    Original languageEnglish
    Number of pages7
    Publication statusPublished - 2017
    EventInternational Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017 - Jeju, Korea, Republic of
    Duration: 16 Apr 201720 Apr 2017

    Conference

    ConferenceInternational Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017
    Abbreviated titleM&C 2017
    CountryKorea, Republic of
    CityJeju
    Period16/04/1720/04/17

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  • Cite this

    Leppänen, J., Viitanen, T., & Hyvönen, O. (2017). Development of a variance reduction scheme in the serpent 2 Monte Carlo code. Paper presented at International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017, Jeju, Korea, Republic of. https://www.kns.org/paper_file/paper/MC2017_2017_2/P109S02-03LeppanenJ.pdf