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- W2888039969 abstract "The Emergency Core Cooling System (ECCS) is actuated following Loss of Coolant Accidents (LOCA) to inject coolant into the primary loop through a 45° T junction configuration in advanced nuclear power plants. The T junction would suffer high cycle thermal fatigue due to possible temperature fluctuations in a non-isothermal mixing cross section. In this paper, the feasibility of Computational Fluid Dynamics (CFD) method on the complex mixing phenomenon simulation in a 45° T junction during the injecting process was verified against experimental data. The thermal mixing mechanism of different injection patterns, which was characterized by the MR number, was unveiled. Moreover, the structure stress analysis was performed to investigate the stress distribution features utilizing thermal-mechanical coupling method. The flow patterns of impact jet flow, deflection flow and upper wall jet flow were defined. The structure stresses were concentrated at the junction joint zone under all the three flow patterns. The variations of maximum stress with MR number were achieved. This work provides a guideline of CFD method for the mixing process simulation in a 45° T junction of ECCS and an important basis for the fatigue assessment and safety management in nuclear power plants." @default.
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- W2888039969 date "2018-11-01" @default.
- W2888039969 modified "2023-10-14" @default.
- W2888039969 title "Study on the coolant mixing phenomenon in a 45° T junction based on the thermal-mechanical coupling method" @default.
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- W2888039969 doi "https://doi.org/10.1016/j.applthermaleng.2018.08.073" @default.
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