Development of methodologies for ex-core detector modeling for SMRs

Alireza Haghighat, Katherine Royston, William J. Walters, Joshua Bergman, Dudley Raine

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    This paper presents accurate and efficient methodologies to model the ex-core detection system for SMRs. This detection system is intended to be used for monitoring the reactor during startup, operation and shutdown. Additionally, the detection system will be useful during abnormal conditions. Two approaches have been employed to model the ex-core detection system, including i) 'forward' statistical Monte Carlo and ii) 'adjoint' deterministic discrete ordinates (Sn). For the Monte Carlo approach, the MCNPX code system with an implementation of the CADIS (Consistent Adjoint Driven Importance Sampling) variance reduction technique is utilized. For the discrete ordinates, the TITAN 3-D parallel hybrid transport code system is utilized. Using MCNPX with CADIS, the effect of a moderation sleeve on the response of a BF-3 ion chamber has been examined, and detector placement for achieving maximum response has been studied.

    Original languageEnglish (US)
    Title of host publicationASME 2014 Small Modular Reactors Symposium, SMR 2014
    PublisherAmerican Society of Mechanical Engineers (ASME)
    ISBN (Print)9780791845363
    DOIs
    Publication statusPublished - Jan 1 2014
    EventASME 2014 Small Modular Reactors Symposium, SMR 2014 - Washington, DC, United States
    Duration: Apr 15 2014Apr 17 2014

    Other

    OtherASME 2014 Small Modular Reactors Symposium, SMR 2014
    CountryUnited States
    CityWashington, DC
    Period4/15/144/17/14

      Fingerprint

    All Science Journal Classification (ASJC) codes

    • Nuclear Energy and Engineering

    Cite this

    Haghighat, A., Royston, K., Walters, W. J., Bergman, J., & Raine, D. (2014). Development of methodologies for ex-core detector modeling for SMRs. In ASME 2014 Small Modular Reactors Symposium, SMR 2014 [V001T03A002] American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/SMR2014-3399