Abstract:
A method for transporting semiconductor wafers in semiconductor factory automation system, includes the steps of: a) processing a lot of semiconductor wafers to be contained in a semiconductor wafer cassette in a process equipment; b) sending a cassette transportation request from the process equipment to a cell management server when the process equipment has processed the lot of semiconductor wafers; c) generating a transportation instruction in response to the cassette transportation request; and d) if the semiconductor wafer cassette is transported from the process equipment to a stocker by an automatic guide vehicle (AGV), simultaneously activating the AGV and the stocker by simultaneously sending the transportation instruction to the AGV and the stocker. The method in accordance with the present invention can reduce a time taken to transport the semiconductor wafers.
Abstract:
A joint structure between a top nozzle and a guide thimble of a nuclear fuel assembly and, more particularly, a structure for joining an inner-extension tube, the top nozzle and the guide thimble. When an inner-extension tube head, which is provided as a means for facilitating removal of the top nozzle of the nuclear fuel assembly from the guide thimble, is removed from an inner-extension tube body to separate the top nozzle from the nuclear fuel assembly, the inner-extension tube body is prevented from undesirably rotating, so that the guide thimble and the inner-extension tube body can maintain the joined state.
Abstract:
Disclosed herein is a joint structure between a top nozzle and a guide thimble. The joint structure includes an outer guide post, an inner-extension tube head, an inner-extension tube body, a wedge and the guide thimble. The outer guide post is provided with an external thread formed on a lower end thereof. The inner-extension tube head includes an annular retaining part formed on an upper end thereof. An internal thread is formed on a medial portion of the inner-extension tube head. An external thread is formed on each of upper and lower ends of the inner-extension tube body. A stop protrusion is provided under a lower end of the wedge. The wedge is welded to the inner-extension tube body after the top nozzle has been joined with the guide thimble. A stop protrusion receiving depression is formed in the guide thimble.
Abstract:
Disclosed is a spacer grid assembly with mixing vanes supporting fuel rods of nuclear fuel assemblies and mixing coolant that flows around the fuel rods, and more particularly, a spacer grid equipped with mixing vanes that mix coolant flowing around fuel rods.The spacer grid with hydraulically balanced mixing vane patterns, in the spacer grid equipped with a strip dividing a plurality of unit grid cells and a plurality of springs, protruded in uniform directions of vertical and horizontal directions on a grid surface of the strip and supporting nuclear fuel rods, which includes: a plurality of mixing vanes protruded to the downstream of coolant on an upper end of the inner grid surface, wherein positions and directions of the mixing vanes are formed in regular patterns on the spacer grid. Thus, it can minimize coolant flow induced vibration of the spacer grid by balancing hydraulic load generated by the mixing vanes, around the center of the spacer grids.
Abstract:
A photosensitive composition and a method of manufacturing a substrate used for a display device are disclosed. The photosensitive composition includes an acrylic based copolymer, a photo-initiator, a photo-sensitizer and a solvent. Thus, a photosensitivity of the photosensitive composition for ultra violet light of a long wavelength may be improved.
Abstract:
Disclosed herein is a hold-down spring unit for a top nozzle of a nuclear fuel assembly. The hold-down spring unit is coupled to the upper end of the top nozzle of the nuclear fuel assembly. The hold-down spring unit includes a first spring which acts against a hold-down force with respect to the nuclear fuel assembly under start-up conditions or hot full power conditions of a nuclear reactor, and a second spring which acts against a hold-down force with respect to the nuclear fuel assembly under start-up conditions of the nuclear reactor. The present invention reduces the hold-down margin under start-up conditions or hot full power conditions, thus enhancing the mechanical and structural stability of the nuclear fuel assembly.
Abstract:
Disclosed is a method for the mass production of a monomeric or dimeric immunoglobulin Fc region, free of initial methionine residues, using a recombinant expression vector comprising a nucleotide sequence coding for a recombinant immunoglobulin Fc region comprising an immunoglobulin Fc region linked at the N-terminus thereof to an immunoglobulin Fc region via a peptide bond.
Abstract:
The present invention relates to an anti-fretting wear spacer grid having a plurality of canoe-shaped springs formed thereon, wherein each of the canoe-shaped springs includes: a fuel rod-contacting part having a flat surface having a predetermined longitudinal length so as to have linear contact with the fuel rod; a curved face-connecting part formed on the upper and lower portions of the fuel rod-contacting part; a leg-connecting part formed on the end portion of the curved face-connecting part; and legs each being formed of a plate shape having a predetermined length and connecting the both sides of the leg-connecting part with one unit grid cell surface.
Abstract:
The present invention relates to a non-contact type battery pack charging apparatus using a magnetic field. In the non-contact type battery pack charging apparatus of the present invention, a main control unit (120) receives input data from a voltage comparison unit (140), a current comparison unit (150), a voltage detection unit (170) and a current detection unit (180), determines whether required conditions are fulfilled, such as whether an object is installed, whether the installed object is a battery pack (200), what the charge capacity of the battery pack (200) is, and whether the charging of the battery pack (200) has been completed, and controls a variable-voltage frequency generation unit (130) to be operated so as to correspond to the required conditions. Accordingly, the charging of the battery pack (200) is performed to correspond to the charging capacity of the battery pack (200) only when the battery pack (200) is installed.