Abstract: In the case of a gas in which several gases are mixed, a type and concentration of the gas may be incorrectly measured when measured using only an optical band-pass filter. The invention of the present application is directed to providing a technology in which a plurality of broadband band-pass filters having overlapping regions are provided to calculate a magnitude of absorption for each wavelength band for light passing through each broadband band-pass filter, thereby identifying the presence of a gas of interest and the presence of a gas other than the gas of interest.

Abstract: The inventive concept provides a substrate treating apparatus. The substrate treating apparatus includes a chamber having a treating space therein; a supply line having a first open/close valve installed thereon and configured to supply a treating fluid to the treating space; a heater installed on the supply line and configured to heat the treating fluid; an exhaust line having a second open/close valve installed thereon and configured to exhaust the treating space; and, a controller configured to control the first open/close value and the second open/close valve such that the treating fluid heated is supplied to and exhausted from the treating space before a treating process is performed on a substrate in the treating space.

Abstract: Disclosed are a czochralski apparatus for growing crystals and a purification method of waste salts using the same. More particularly, the present invention provides a czochralski apparatus for growing crystals comprising screw thread for fixing salt crystals mounted on a pulling bar of the apparatus in order to prevent desorption of crystals caused by load thereof during a crystal growing process without requiring alternative seed crystals and, in addition, a method for purification of waste salts, which can isolate impurities from molten waste salts using a czochralski crystal growing process without alternative adsorption medium, does not generate secondary wastes and may continuously purify the waste salts.

Abstract: Disclosed is a structural alloy with oxidation resistance for electrolytic reduction equipment for treatment of spent nuclear fuel. More particularly, the present invention relates to a structural alloy with oxidation resistance for electrolytic reduction equipment for treatment of spent nuclear fuel wherein Cr, Si, Al, Nb and Ti are added to a Ni-based substrate so as to form an oxide coating film which is stable in a LiCl—Li2O molten salt and, in addition, a process thereof and use of the same.

Abstract: Disclosed herein is a method of preparing uranium metal by electrorefining uranium metal, comprising: applying a predetermined current to an anode electrode included in an anode basket receiving fuel segments made of uranium metal and a cathode electrode of carbon material; electrodepositing uranium on the cathode electrode in accordance with the reaction initiated by the applied current; and collecting the electrodeposited uranium by self-weight. An apparatus for electrorefining uranium metal used in the method according to the present invention, comprises: an anode basket (6) receiving fuel segments made of uranium metal and comprising an anode electrode; and a reactor including a cathode electrode (5) made of carbon material and a uranium collector (10) therein.

Abstract: Disclosed is a structural alloy with oxidation resistance for electrolytic reduction equipment for treatment of spent nuclear fuel. More particularly, the present invention relates to a structural alloy with oxidation resistance for electrolytic reduction equipment for treatment of spent nuclear fuel wherein Cr, Si, Al, Nb and Ti are added to a Ni-based substrate so as to form an oxide coating film which is stable in a LiCl—Li2O molten salt and, in addition, a process thereof and use of the same.

Abstract: Disclosed is a continuous electrorefining device for recovering metal uranium. The electrorefining device comprises an electrolytic cell 10 having an internal accommodating space filled with electrolyte; a cathode unit 20 including a top plate 22, connecting rods 21 whose top ends are joined to the top plate 22, and cathode electrodes 24 whose top end is joined to lower plates; an anode unit 40 which is placed in a cylinder shape surrounding the cathode electrodes 24; a uranium recovery unit 50 for drawing out the uranium metal by a first drawing-out means; and a transition metal recovery unit 60 for drawing out the metal particles by a second drawing-out means. The cathode unit 20 further comprises an insulating and vibration absorbing member that is interposed between the top plate 22 and the cover plate 12; and a vibration means which is mounted on the top plate 22 to transmit vibration and impact force to the cathode electrode 24 through the connecting rods 21.

Abstract: Disclosed are a czochralski apparatus for growing crystals and a purification method of waste salts using the same. More particularly, the present invention provides a czochralski apparatus for growing crystals comprising screw thread for fixing salt crystals mounted on a pulling bar of the apparatus in order to prevent desorption of crystals caused by load thereof during a crystal growing process without requiring alternative seed crystals and, in addition, a method for purification of waste salts, which can isolate impurities from molten waste salts using a czochralski crystal growing process without alternative adsorption medium, does not generate secondary wastes and may continuously purify the waste salts.

Abstract: Disclosed herein is a continuous electrolytic refining device for metal uranium, the device comprising a cathode section fixed to the lower side of the heat radiation plate, and having a plurality of graphite cathodes; an anode section encompassing the cathode section to face the cathode section, rotatably fixed to the lower side of the heat radiation plate, and receiving the used nuclear fuel; an electrolytic cell receiving the cathode section and the anode section and filled with electrolytes so as to sink the cathode section and the anode section; an uranium collecting section collecting metal uranium deposited on and detached from the graphite cathode in the lower side of the cathode section inside the electrolytic cell and withdrawing the collected metal uranium to the outside of the electrolytic cell; and a transition metal collecting section coupled with the lower side of the electrolytic cell to withdraw the transition metal particles released from the anode section and collected in the lower side of

Abstract: Disclosed relates to a method for preparing tantalum or niobium powders used for manufacturing capacitors in an electrolytic reducing reactor including an anode, a cathode and a molten salt, the method comprising: obtaining a tantalum or niobium oxide, expressed by Ta2O(5-y) or Nb2O(5-y) where y=2.5 to 4.

Abstract: Disclosed herein is a method of preparing uranium metal by electrorefining uranium metal, comprising: applying a predetermined current to an anode electrode included in an anode basket receiving fuel segments made of uranium metal and a cathode electrode of carbon material; electrodepositing uranium on the cathode electrode in accordance with the reaction initiated by the applied current; and collecting the electrodeposited uranium by self-weight. An apparatus for electrorefining uranium metal used in the method according to the present invention, comprises: an anode basket (6) receiving fuel segments made of uranium metal and comprising an anode electrode; and a reactor including a cathode electrode (5) made of carbon material and a uranium collector (10) therein.

Abstract: An optical pickup device which is capable of reproducing and recording information from at least two discs having different thicknesses includes a light source, an objective lens provided along the light path from the light source facing the plane of a disc and having a predetermined effective diameter, a beam splitter provided between the objective lens and the light source, a photodetector for detecting the beam split from the light splitter and reflected from the disc, and light controller provided along the light path facing the photodetector lens for controlling the light of the intermediate region between near- and far axis regions of an incident light beam. The optical pickup device is simplified and the manufacturing cost therefor is low. Also, by reducing the spherical aberration effect for the light, discs having different thicknesses can be used in a single disc drive.

Abstract: An optical pickup includes a Wollaston prism for passing incident light generated from a light source and splitting reflected light from an optical disk into two polarized components, and two photodetectors for receiving the split reflected light beams, thereby simplifying and miniaturizing the apparatus.