Computational Fluid Dynamics (CFD) in Nuclear Reactor Safety (NRS)
Ongoing

Following the Exploratory Meeting of Experts to Define an Action Plan on the Application of Computational Fluid Dynamics (CFD) Codes to Nuclear Reactor Safety Problems held in Aix-en-Provence, France, in 2002, the NEA Working Group on Analysis and Management of Accidents (WGAMA) initiated an activity focusing on computational fluid dynamics (CFD) in nuclear reactor safety (NRS). The meeting also defined near-term objectives:

  1. To review existing CFD guidelines, analyse their completeness for single phase NRS applications, and make recommendations on the need to write a new guidance manual devoted to NRS.
  2. To list NRS problems requiring CFD use, identify existing and needed assessment actions, and define a methodology to develop NRS-specific assessment matrices.
  3. To explore extension of CFD to two-phase problems, including classification of two-phase NRS problems requiring CFD, classification of different modelling approaches, specification and analysis of needs for physical assessment, specification and analysis of needs for numerical assessment.
  4. To establish benchmarks on turbulent and stratified flows, jet impingement, and CFD coupling to 0-D/1-D thermal-hydraulic codes.

In the first instance, three writing groups were formed at the end of 2002 to produce reports on the first three activities. Further activities have been defined in subsequent years creating task groups for organising workshops, performing code-data benchmarks and revising reports.

Ongoing activities

CFD for Nuclear Reactor Safety Phase 6 – Supporting an enlarged use

Members’ area

Thermal mixing and fatigue in a T-junction with a dead leg – benchmarking and experimental validation of CFD

Members’ area

Reports providing guidance on CFD application to NRS

The three initial writing groups began to publish their work as CSNI reports in 2007. These have been subsequently updated (leading to new versions published in 2014). A fourth group was added to examine uncertainty quantification methods:

NEA/CSNI/R(2022)10 

Best Practice Guidelines for the Use of CFD in Nuclear Reactor Safety Applications – Revision (forthcoming)

NEA/CSNI/R(2014)11 

Best Practice Guidelines for the use of CFD in Nuclear Reactor Safety Applications - revision

NEA/CSNI/R(2007)5 

Best Practice Guidelines for the use of CFD in Nuclear Reactor Safety Applications

NEA/CSNI/R(2016)4 

Review of Uncertainty Methods for Computational Fluid Dynamics Application to Nuclear Reactor Thermal Hydraulics

NEA/CSNI/R(2020)3Requirements for CFD-Grade Experiments for Nuclear Reactor Thermal Hydraulics 

Requirements for CFD-Grade Experiments for Nuclear Reactor Thermal Hydraulics

NEA/CSNI/R(2014)13 

Extension of CFD Codes Application to Two-Phase Flow Safety Problems - Phase 3

NEA/CSNI/R(2014)13/REV1

Extension of CFD Codes Application to Two-Phase Flow Safety Problems

NEA/CSNI/R(2014)12 

Assessment of CFD Codes for Nuclear Reactor Safety Problems - revision 2

NEA/CSNI/R(2010)2 

Extension of CFD Codes Application to Two-Phase Flow Safety Problems - Phase 2

NEA/CSNI/R(2007)13 

Assessment of CFD Codes for Nuclear Reactor Safety Problems

In addition to the aforementioned reports, there are NEA reports available that cover topics of more general interest.

NEA PUBLICATION 7615

Technical Opinion Paper on the Use of CFD for Nuclear Safety (forthcoming)

Related topics
  • Nuclear safety research
  • Related news
    3
    results
    Publications and reports
    22
    results

    CFD benchmarks

    Benchmark exercises have been organised requiring identification of a suitable CFD-quality experiment, full specification of the analysis to be performed in blind conditions (i.e., no knowledge of the experimental results) then compilation of results for comparison.

    NEA/CSNI/R(2023)2 

    The fluid-structure interaction (FSI) benchmark based on OKBM experiments to validate coupled computational fluid dynamics (CFD) and computational structural dynamics (CSD) Calculations (forthcoming)

    NEA/CSNI/R(2020)7Cold Leg Mixing Computational Fluid Dynamics – Uncertainty Quantification (CLM-UQ) Benchmark Results

    Cold Leg Mixing CFD – UQ Benchmark Results

    NEA/CSNI/R(2017)19 

    OECD/NEA CFD–UQ Benchmark Exercise: CFD prediction and Uncertainty Quantification of a GEMIX mixing layer test

    NEA/CSNI/R(2016)2 

    The Nuclear Energy Agency/Paul Scherrer Institute Computational Fluid Dynamics Benchmark Exercise

    NEA/CSNI/R(2013)5 

    Report of the OECD/NEA-KAERI Rod Bundle CFD Benchmark Exercise

    NEA/CSNI/R(2011)5 

    Report of the OECD/NEA - Vattenfall T-Junction Benchmark Exercise

    CFD workshops

    Biennial workshops were inaugurated in 2006 aiming to create a forum for numerical analysts and experimenters for exchanging information on nuclear safety issues covering single- and multi-phase flows. Submitted papers are peer reviewed by members of the scientific committee.

    NEA/CSNI/R(2022)2 

    OECD/NEA CSNI Virtual CFD4NRS-8 Workshop

    NEA/CSNI/R(2020)5 

    Workshop on Experimental Validation and Application of CFD and CMFD Codes to Nuclear Reactor Safety Issues, CFD4NRS-7

    NEA/CSNI/R(2017)20 

    Computational Fluid Dynamics for Nuclear Reactor Safety Applications-6(CFD4NRS-6) Workshop Proceedings 13-15 September 2016 Cambridge USA

    NEA/CSNI/R(2016)1 

    Computational Fluid Dynamics for Nuclear Reactor Safety-5 (CFD4NRS-5) - Workshop Proceedings, 9-11 September 2014, Zurich, Switzerland

    NEA/CSNI/R(2014)4 

    Proceedings of the CFD for Nuclear Reactor Safety Applications (CFD4NRS-4) Workshop, 10-12 September 2012, Daejeon Convention Centre (DCC), Yuseong, Daejeon, Korea

    NEA/CSNI/R(2011)14 

    Proceedings of the Workshop on CFD for Nuclear Reactor Safety Applications (CF4NRS-3) September 14-16, 2010, Bethesda North Marriott & Conference Center, Bethesda, MD, USA

    NEA/CSNI/R(2009)12 

    Proceedings of the Workshop on Experiments and CFD Codes Application to Nuclear Reactor Safety (XCFD4NRS) - Grenoble, France, 10-12 September 2008 - Full presentations available at www.nea.fr/html/nsd/csni/cfd/workshops/XCFD4NRS/index.html

    NEA/CSNI/R(2007)3 

    Proceedings of the Workshop on Benchmarking of CFD Codes for Application to Nuclear Reactor Safety (CFD4NRS). Garching, 5-7 September 2006. Also available at http://www.oecd-nea.org/nsd/reports/2007/nea6298-benchmarking.html

    NEA/CSNI/R(2002)16 

    Proceedings of an exploratory meeting of experts to define an action plan on the application of computational fluid dynamics (CFD) to nuclear reactor safety problems - Aix en provence - 15-16 May 2002

    After each workshop, a selection of papers may appear in a special issue of Nuclear Engineering and Design, e.g.:

    • Chul-Hwa Song, Brian L. Smith, Dominique Bestion, Yassin A Hassan, "Special issue CFD4NRS-4“, Nuclear Engineering and Design, Volume 279, Pages 1-218 (2014)
    • Dominique Bestion, Chris Boyd, Brian Smith, Yassin Hassan, Ghani Zigh, “Special issue CFD4NRS-3, Nuclear Engineering and Design, Volume 253, Pages 1-412 (December 2012)

     

    WGAMA / CFD members' area (password protected)

    *If you are interested in obtaining a copy of a report that is not yet available online, please feel free to contact the NEA Secretariat for further assistance.

    Contact

    Martina ADORNI