TY - GEN
T1 - Motion model of spent fuel rack considering two-dimensional gap flow
AU - Uemichi, Akane
AU - Araki, Yuto
AU - Kaneko, Shigehiko
N1 - Publisher Copyright:
Copyright © 2020 ASME.
PY - 2020
Y1 - 2020
N2 - Free-standing rack system, where each rack is not fixed to the floor nor the wall, is proposed and is in use in European countries and the US as a storage method of the nuclear power station spent fuel. Although this system can reduce the influence of the excitation force of earthquake by making use of frictional force between the bottom surface of the rack and the floor surface together with the fluid force excited by the motion of each rack, design guidelines are not yet established. In this research, to evaluate the fluid force more precisely, the gap between the racks is treated as a two-dimensional gap flow, the pressure loss coefficient at the flow path junction and the top of the flow path were estimated based on the steady CFD calculation and incorporated with the motion model. Our main concern in this paper is the rocking motion. As a result, it was concluded that rocking motion can be suppressed by increasing the pressure loss coefficient at the top of the fuel rack.
AB - Free-standing rack system, where each rack is not fixed to the floor nor the wall, is proposed and is in use in European countries and the US as a storage method of the nuclear power station spent fuel. Although this system can reduce the influence of the excitation force of earthquake by making use of frictional force between the bottom surface of the rack and the floor surface together with the fluid force excited by the motion of each rack, design guidelines are not yet established. In this research, to evaluate the fluid force more precisely, the gap between the racks is treated as a two-dimensional gap flow, the pressure loss coefficient at the flow path junction and the top of the flow path were estimated based on the steady CFD calculation and incorporated with the motion model. Our main concern in this paper is the rocking motion. As a result, it was concluded that rocking motion can be suppressed by increasing the pressure loss coefficient at the top of the fuel rack.
KW - Flow induced vibration
KW - Free standing rack
KW - Gap flow
KW - Pressure loss
KW - Seismic engineering
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U2 - 10.1115/PVP2020-21848
DO - 10.1115/PVP2020-21848
M3 - Conference contribution
AN - SCOPUS:85096161692
T3 - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
BT - Fluid-Structure Interaction
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2020 Pressure Vessels and Piping Conference, PVP 2020
Y2 - 3 August 2020
ER -