• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Computational Scientific Study on Mechanism of Multiphase Thermal-Hydraulic Phenomena Related to IVR in Core Disruptive Accidents

Research Project

Project/Area Number 21K04944
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 31010:Nuclear engineering-related
Research InstitutionKyushu University

Principal Investigator

Morita Koji  九州大学, 工学研究院, 教授 (40311849)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords高速炉 / 過酷事故 / 炉心損傷事故 / 計算科学 / 粒子法 / 多相流 / 熱流動 / 伝熱流動 / IVR
Outline of Research at the Start

高速炉の炉心損傷事故時の溶融燃料の原子炉内保持(IVR:In-Vessel Retention)を達成する上で重要な熱流動現象を解明するため、多成分多相流の伝熱・流動・相変化挙動等を精度よく解析できる計算科学的手法(粒子法)を用いた解析的研究を実施する。これまで実施された原子炉安全性試験におけるIVRの達成に関わる重要な支配現象を対象とした解析評価を行い、当該現象に介在する多成分多相流の伝熱流動挙動の機構を解明する。これにより、炉心損傷事故評価の信頼度を向上し、IVRを基本とする高速炉の安全論理の構築に資する。

Outline of Final Research Achievements

To clarify thermal-hydraulic phenomena that are important for achieving in-vessel retention (IVR) of core materials during severe accidents in fast reactors, a 3D thermal-hydraulic analysis code based on a computational science method (particle method) that can analyze multi-component multiphase flow behavior with heat transfer, convection, and phase changes with high accuracy has been developed as a fundamental technology. From the fast reactor safety tests conducted so far, "heat transfer behavior from the molten fuel pool to the structural wall" and "erosion behavior of the structural wall due to jet impingement" were selected as important dominant phenomena related to IVR, and 3-D particle based simulations were conducted for these phenomena. As a result, the mechanism of thermal-hydraulic behavior involved in these dominant phenomena, which is difficult to analyze with high accuracy using conventional analytical techniques based on empirical models, was clarified.

Academic Significance and Societal Importance of the Research Achievements

本研究は、高速炉の過酷事故を対象としたものであるが、計算科学的手法である粒子法を基盤とする数値シミュレーション技術は、他の原子炉における過酷事故の熱流動現象解析にも応用できることから、汎用性、適用性に優れた原子力分野における安全評価技術のイノベーションと位置づけられる。また、本研究により、原子炉の過酷事故において重要な熱流動現象について、支配因子の影響度を定量的に明確化し、安全評価の妥当性を確認するための新たな知見や裏付けを提供できる。これにより、過酷事故評価の信頼度を向上し、原子炉の安全論理の構築に資することが期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (5 results)

All 2023 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] A 3D particle-based simulation of heat and mass transfer behavior in the EAGLE ID1 in-pile test2022

    • Author(s)
      Zhang Ting、Morita Koji、Liu Xiaoxing、Liu Wei、Kamiyama Kenji
    • Journal Title

      Annals of Nuclear Energy

      Volume: 179 Pages: 109389-109389

    • DOI

      10.1016/j.anucene.2022.109389

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] A Large-Scale Particle-Based Simulation of Heat and Mass Transfer Behavior in EAGLE ID1 In-Pile Test2023

    • Author(s)
      T. ZHANG, Y. YAO, K. MORITA, X. LIU, W. LIU, Y. IMAIZUMI, K. KAMIYAMA
    • Organizer
      30th International Conference on Nuclear Engineering (ICONE30)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Particle-Based Simulation of Jet Impingement Behaviors2022

    • Author(s)
      Daichi Takatsuka, Koji Morita, Wei Liu, Ting Zhang, Takeshi Nakamura, Kenji Kamiyama
    • Organizer
      12th Japan-Korea Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS12)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical Investigation on Mechanism of Heat Transfer between Molten Pool and Duct Wall in EAGLE ID1 and ID2 In-Pile Tests2022

    • Author(s)
      Ting Zhang, Koji Morita, Wei Liu, Xiaoxing Liu, Kenji Kamiyama
    • Organizer
      The 19th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-19)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] A 3D Particle-Based Analysis of Molten Pool-to-Structural Wall Heat Transfer in a Simulated Fuel Subassembly2021

    • Author(s)
      Ting Zhang, Koji Morita, Xiaoxing Liu, Wei Liu, Kenji Kamiyama
    • Organizer
      The Second Asian Conference on Thermal Sciences (2nd ACTS)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi