Overview and Outcomes of the OECD/NEA Benchmark Study of the Accident at the Fukushima Daiichi NPS (BSAF) Phase 2—Results of Severe Accident Analyses for Unit 3

Terttaliisa Lind, Marco Pellegrini, Luis Enrique Herranz, Martin Sonnenkalb, Y. Nishi, H. Tamaki, F. Cousin, Leticia Fernandez-Moguel, Nathan Andrews, Tuomo Sevon

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)

    Abstract

    The Phase 2 of the OECD/NEA Project “Benchmark Study of the Accident at the Fukushima Daiichi Nuclear Power Plant (BSAF)” was established in mid-2015. The objectives were similar to Phase 1 of the project but with an extended analysis period of 3 weeks from the occurrence of the earthquake, the main focus on fission product behavior and releases to the environment and the comparison to various data including radiological data and results of backwards calculations of the source term.

    Eight organizations of five countries (CRIEPI, IAE, JAEA and NRA, Japan; IRSN France; PSI, Switzerland; SNL, USA; VTT, Finland) submitted results of their calculated severe accident scenarios for Unit 3 at the Fukushima Daiichi site using different severe accident codes (ASTEC, MAAP, MELCOR, SAMPSON, THALES).

    The present paper for Unit 3 describes the findings of the comparison of the participants’ results against each other and against plant data, the evaluation of the accident progression and the final status inside the reactors. Special focus is on the status of the reactor pressure vessel, melt release and fission product release and transport. Unit 3 specific aspects will be highlighted and points of consensus as well as remaining uncertainties and data needs will be summarized. The results for Units 1 and 2, and an overall summary are presented in separate papers.
    Original languageEnglish
    Title of host publicationProceedings of the 18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH-18
    PublisherAmerican Nuclear Society ANS
    Pages1133-1146
    Number of pages14
    ISBN (Electronic)978-0-89448-767-5
    Publication statusPublished - 2019
    MoE publication typeA4 Article in a conference publication
    Event18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2019 - Portland, United States
    Duration: 18 Aug 201923 Aug 2019

    Conference

    Conference18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2019
    Abbreviated titleNURETH-18
    CountryUnited States
    CityPortland
    Period18/08/1923/08/19

    Fingerprint

    Accidents
    Fission products
    Pressure vessels
    Nuclear power plants
    Earthquakes

    Keywords

    • Accident analysis
    • Fission products
    • Fukushima
    • OECD/NEA BSAF project
    • Unit 3

    Cite this

    Lind, T., Pellegrini, M., Herranz, L. E., Sonnenkalb, M., Nishi, Y., Tamaki, H., ... Sevon, T. (2019). Overview and Outcomes of the OECD/NEA Benchmark Study of the Accident at the Fukushima Daiichi NPS (BSAF) Phase 2—Results of Severe Accident Analyses for Unit 3. In Proceedings of the 18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH-18 (pp. 1133-1146). American Nuclear Society ANS.
    Lind, Terttaliisa ; Pellegrini, Marco ; Herranz, Luis Enrique ; Sonnenkalb, Martin ; Nishi, Y. ; Tamaki, H. ; Cousin, F. ; Fernandez-Moguel, Leticia ; Andrews, Nathan ; Sevon, Tuomo. / Overview and Outcomes of the OECD/NEA Benchmark Study of the Accident at the Fukushima Daiichi NPS (BSAF) Phase 2—Results of Severe Accident Analyses for Unit 3. Proceedings of the 18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH-18. American Nuclear Society ANS, 2019. pp. 1133-1146
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    title = "Overview and Outcomes of the OECD/NEA Benchmark Study of the Accident at the Fukushima Daiichi NPS (BSAF) Phase 2—Results of Severe Accident Analyses for Unit 3",
    abstract = "The Phase 2 of the OECD/NEA Project “Benchmark Study of the Accident at the Fukushima Daiichi Nuclear Power Plant (BSAF)” was established in mid-2015. The objectives were similar to Phase 1 of the project but with an extended analysis period of 3 weeks from the occurrence of the earthquake, the main focus on fission product behavior and releases to the environment and the comparison to various data including radiological data and results of backwards calculations of the source term.Eight organizations of five countries (CRIEPI, IAE, JAEA and NRA, Japan; IRSN France; PSI, Switzerland; SNL, USA; VTT, Finland) submitted results of their calculated severe accident scenarios for Unit 3 at the Fukushima Daiichi site using different severe accident codes (ASTEC, MAAP, MELCOR, SAMPSON, THALES).The present paper for Unit 3 describes the findings of the comparison of the participants’ results against each other and against plant data, the evaluation of the accident progression and the final status inside the reactors. Special focus is on the status of the reactor pressure vessel, melt release and fission product release and transport. Unit 3 specific aspects will be highlighted and points of consensus as well as remaining uncertainties and data needs will be summarized. The results for Units 1 and 2, and an overall summary are presented in separate papers.",
    keywords = "Accident analysis, Fission products, Fukushima, OECD/NEA BSAF project, Unit 3",
    author = "Terttaliisa Lind and Marco Pellegrini and Herranz, {Luis Enrique} and Martin Sonnenkalb and Y. Nishi and H. Tamaki and F. Cousin and Leticia Fernandez-Moguel and Nathan Andrews and Tuomo Sevon",
    year = "2019",
    language = "English",
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    Lind, T, Pellegrini, M, Herranz, LE, Sonnenkalb, M, Nishi, Y, Tamaki, H, Cousin, F, Fernandez-Moguel, L, Andrews, N & Sevon, T 2019, Overview and Outcomes of the OECD/NEA Benchmark Study of the Accident at the Fukushima Daiichi NPS (BSAF) Phase 2—Results of Severe Accident Analyses for Unit 3. in Proceedings of the 18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH-18. American Nuclear Society ANS, pp. 1133-1146, 18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2019, Portland, United States, 18/08/19.

    Overview and Outcomes of the OECD/NEA Benchmark Study of the Accident at the Fukushima Daiichi NPS (BSAF) Phase 2—Results of Severe Accident Analyses for Unit 3. / Lind, Terttaliisa; Pellegrini, Marco; Herranz, Luis Enrique; Sonnenkalb, Martin; Nishi, Y.; Tamaki, H.; Cousin, F.; Fernandez-Moguel, Leticia; Andrews, Nathan; Sevon, Tuomo.

    Proceedings of the 18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH-18. American Nuclear Society ANS, 2019. p. 1133-1146.

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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    T1 - Overview and Outcomes of the OECD/NEA Benchmark Study of the Accident at the Fukushima Daiichi NPS (BSAF) Phase 2—Results of Severe Accident Analyses for Unit 3

    AU - Lind, Terttaliisa

    AU - Pellegrini, Marco

    AU - Herranz, Luis Enrique

    AU - Sonnenkalb, Martin

    AU - Nishi, Y.

    AU - Tamaki, H.

    AU - Cousin, F.

    AU - Fernandez-Moguel, Leticia

    AU - Andrews, Nathan

    AU - Sevon, Tuomo

    PY - 2019

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    N2 - The Phase 2 of the OECD/NEA Project “Benchmark Study of the Accident at the Fukushima Daiichi Nuclear Power Plant (BSAF)” was established in mid-2015. The objectives were similar to Phase 1 of the project but with an extended analysis period of 3 weeks from the occurrence of the earthquake, the main focus on fission product behavior and releases to the environment and the comparison to various data including radiological data and results of backwards calculations of the source term.Eight organizations of five countries (CRIEPI, IAE, JAEA and NRA, Japan; IRSN France; PSI, Switzerland; SNL, USA; VTT, Finland) submitted results of their calculated severe accident scenarios for Unit 3 at the Fukushima Daiichi site using different severe accident codes (ASTEC, MAAP, MELCOR, SAMPSON, THALES).The present paper for Unit 3 describes the findings of the comparison of the participants’ results against each other and against plant data, the evaluation of the accident progression and the final status inside the reactors. Special focus is on the status of the reactor pressure vessel, melt release and fission product release and transport. Unit 3 specific aspects will be highlighted and points of consensus as well as remaining uncertainties and data needs will be summarized. The results for Units 1 and 2, and an overall summary are presented in separate papers.

    AB - The Phase 2 of the OECD/NEA Project “Benchmark Study of the Accident at the Fukushima Daiichi Nuclear Power Plant (BSAF)” was established in mid-2015. The objectives were similar to Phase 1 of the project but with an extended analysis period of 3 weeks from the occurrence of the earthquake, the main focus on fission product behavior and releases to the environment and the comparison to various data including radiological data and results of backwards calculations of the source term.Eight organizations of five countries (CRIEPI, IAE, JAEA and NRA, Japan; IRSN France; PSI, Switzerland; SNL, USA; VTT, Finland) submitted results of their calculated severe accident scenarios for Unit 3 at the Fukushima Daiichi site using different severe accident codes (ASTEC, MAAP, MELCOR, SAMPSON, THALES).The present paper for Unit 3 describes the findings of the comparison of the participants’ results against each other and against plant data, the evaluation of the accident progression and the final status inside the reactors. Special focus is on the status of the reactor pressure vessel, melt release and fission product release and transport. Unit 3 specific aspects will be highlighted and points of consensus as well as remaining uncertainties and data needs will be summarized. The results for Units 1 and 2, and an overall summary are presented in separate papers.

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    KW - Fission products

    KW - Fukushima

    KW - OECD/NEA BSAF project

    KW - Unit 3

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    Lind T, Pellegrini M, Herranz LE, Sonnenkalb M, Nishi Y, Tamaki H et al. Overview and Outcomes of the OECD/NEA Benchmark Study of the Accident at the Fukushima Daiichi NPS (BSAF) Phase 2—Results of Severe Accident Analyses for Unit 3. In Proceedings of the 18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH-18. American Nuclear Society ANS. 2019. p. 1133-1146