ナトリウム冷却高速炉の高サイクル熱疲労現象に対する解析評価手法整備

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タイトル別名
  • Establishment of Numerical Estimation Method for High Cycle Thermal Fatigue in Sodium-cooled Fast Reactor
  • （（２）基本妥当性確認のための並行３噴流ナトリウム試験を用いたベンチマーク解析）
  • ((2) Benchmark Analysis using Planar Triple Parallel Jet Sodium Test for Fundamental Validation)

抄録

<p>Thermal fatigue caused by thermal mixing phenomena called thermal striping is one of the most important issues in design of sodium-cooled fast reactors (SFRs). In JAEA, a numerical simulation code named MUGTHES which can deal with conjugate heat transfer between the fluid and the structure parts has been developed in order to predict the thermal response in the structure for estimation of the thermal fatigue issue. In fundamental validation of the MUGTHES, the benchmark analysis was considered using the experiment of planar triple parallel jet sodium test (PLAJEST). Since it was known by literatures that five representative flow patterns according to the velocity rate (Vr=Vs/Vc) of the side jets (Vs) to the center jet (Vc) were shown in the triple jet, three specific experimental conditions at Vr=1, 1.56, and 5.56 in PLAJEST were employed as boundary conditions for the benchmark analyses. Through the benchmarks, applicability of the large eddy simulation (LES) approach with the standard Smagorinsky model in MUGTHES to simulate thermal striping phenomena was potentially confirmed.</p>

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