1 Introduction Based on the fabrication methods of forging, drilling and welding, the cooling channels in ITER shield block （SB） are drilled radial holes with flow drives. In the old design of FDR2001, the pressure...1 Introduction Based on the fabrication methods of forging, drilling and welding, the cooling channels in ITER shield block （SB） are drilled radial holes with flow drives. In the old design of FDR2001, the pressure drop in the poloidal hole was very high and it was difficult to achieve uniform flow distribution in the radial holes. In recent years, great improvements of the blanket design were made by ITER international team. One of the most important improvements is the new coolant flow configuration in the SB （See Fig.l）, where a special shape of flow driver is mounted inside the drilled radial hole, and coolant flows through clearance between the driver and the hole.展开更多
ITER blanket design has progressed significantly since 2001, which resulted in a reduction in cost and an increase in performance with respect to FDR 2001. One of the most important improvements is the new coolant flo...ITER blanket design has progressed significantly since 2001, which resulted in a reduction in cost and an increase in performance with respect to FDR 2001. One of the most important improvements is the new coolant flow configuration in the shield block （ SB ） . In the current design TM, the cooling circuit in the SB is a matrix of radial holes which are arranged in eight poloidal rows. The rows are fed in parallel by front headers and back drilled collectors, and merge in four couples through the front header. These four couples of rows are linked in series by transverse holes. In the current design, a special shape of flow driver is mounted inside the radial hole, and coolant flows through clearance between the driver and drilled radial hole, which allows achieving a high coolant velocity,展开更多
文摘1 Introduction Based on the fabrication methods of forging, drilling and welding, the cooling channels in ITER shield block （SB） are drilled radial holes with flow drives. In the old design of FDR2001, the pressure drop in the poloidal hole was very high and it was difficult to achieve uniform flow distribution in the radial holes. In recent years, great improvements of the blanket design were made by ITER international team. One of the most important improvements is the new coolant flow configuration in the SB （See Fig.l）, where a special shape of flow driver is mounted inside the drilled radial hole, and coolant flows through clearance between the driver and the hole.
文摘ITER blanket design has progressed significantly since 2001, which resulted in a reduction in cost and an increase in performance with respect to FDR 2001. One of the most important improvements is the new coolant flow configuration in the shield block （ SB ） . In the current design TM, the cooling circuit in the SB is a matrix of radial holes which are arranged in eight poloidal rows. The rows are fed in parallel by front headers and back drilled collectors, and merge in four couples through the front header. These four couples of rows are linked in series by transverse holes. In the current design, a special shape of flow driver is mounted inside the radial hole, and coolant flows through clearance between the driver and drilled radial hole, which allows achieving a high coolant velocity,
