Abstract:
A fuel assembly included a plurality of fuel rods, fuel spacers for maintaining gaps between the fuel rods and a channel box. The channel box includes spacer support portions projecting inwardly from an inner surface of the channel box and supporting the fuel spacer in a transverse direction and creep deformation inhibition portions disposed at the lower end portion of the channel box and projecting inwardly. The distance between the spacer support portions disposed to oppose one another in a horizontal direction is smaller than the distance between the creep deformation inhibition portions opposing one another in the horizontal direction.
Abstract:
A fuel assembly has a water rod which consists of a coolant ascending path and a coolant descending path, the coolant ascending path opening below a fuel support of a lower tie plate, the coolant descending path opening above the fuel support and adapted to guide downwardly the coolant that has flowed up the coolant ascending path to the upper portion of the water rod. The lateral cross section of the coolant ascending path is more than 25 times that of the coolant descending path.The nuclear reactor with these fuel assemblies loaded in the core is operated as follows. After startup of the reactor when the reactor power is low, all the control rods inserted in the core are withdrawn completely. Then, the reactor power is controlled by regulating a liquid level formed in the water rods. This reactor operation method prolongs the lifetime of the control rods, thereby reducing the number of times they have to be replaced.
Abstract:
A speed control device for a sewing machine includes at least means for providing a speed reference voltage signal, means for producing a motor speed voltage signal responsive to an actual speed of the driving motor, and means for comparing the speed reference voltage signal with the motor speed voltage signal to provide a speed difference signal. The speed difference signal is utilized to determine triggering angle of a thyristor means for controlling the motor speed and to maintain the predetermined motor speed irrespective of any variation in the driving torque of the motor, the voltage of the power source and the frequency of the A.C. power source.
Abstract:
To provide a container usable as a deep bottom- and shallow bottom-type container by changing between deep bottom- and shallow bottom-type container configurations by folding along prescribed ruled lines, forming a protruding part on the circumferential wall surface and forming undistorted smooth surfaces; and to provide a manufacturing method thereof. This container usable as a deep bottom- and shallow bottom-type container in which a deep bottom-type container configuration can be changed into a shallow bottom-type container configuration, wherein said deep-bottom type container is obtained by folding, along prescribed ruled lines, a single blank having a part with prescribed ruled lines and corresponding to the bottom surface, a part sectioned into compact triangles and quadrilaterals and corresponding to a partition surface, and a part corresponding to an inner folded surface, and said deep-bottom type container comprises a protruding part formed without distortion on the circumferential wall surface; and a manufacturing method thereof.
Abstract:
The invention provides a method for evaluating a corneal disorder quantitatively and is applicable to living eyes. In particular, the invention provides a method for measuring a corneal transepithelial electric resistance, which method comprises: (1) a step of placing a first electrode on the cornea and a second electrode on the conjunctiva; and (2) a step of flowing an electric current between the first electrode and the second electrode to measure the electric resistance. The invention also provides a device for measuring a corneal transepithelial electric resistance value.
Abstract:
A display apparatus for displaying color images on a screen by projecting each-color image beams modulated with a display device includes a memory storing correction data exhibiting a registration deviation amount on the screen; a displacement calculating unit calculating the registration deviation amount every one pixel of at least one-color signal based on the correction data stored in the memory; a correcting unit correcting the signal level of the one-color signal so that the signal level becomes in proportion to a brightness level on the screen; and a registration deviation correcting unit correcting the registration deviation of the one-color signal every one pixel by interpolation arithmetic processing of the color signal corrected with the correcting unit based on the registration deviation amount calculated with the displacement calculating unit, wherein the display device of the corresponding color is driven by the color signal corrected with the registration deviation correcting unit.
Abstract:
A sputtering apparatus includes a substrate holding section that holds a substrate on which surface a film is formed; a plate-shaped target made of a material of the film and disposed in a position facing the surface of the substrate in an atmosphere of a predetermined gas; a magnetic field generator that is disposed on a side, opposed to the substrate side, of the target, that generates a magnetic field having an arc shape with a vertex reaching the substrate side, and that rotates the magnetic field along the target; a power source that applies, to the target, voltage of a polarity causing ions of the predetermined gas to head for the target; and a magnetic plate that is inserted between the target and the magnetic field generator and that limits the magnetic field reaching the target at a part of a rotation path of the magnetic field.
Abstract:
A velocimeter is disclosed that includes a plurality of photodetectors detecting scattered light in different directions, the light being emitted from a laser source and reflected on a moving object. The velocimeter includes an analog-to-digital conversion unit converting detection signals of the photodetectors, a velocity calculator calculating velocities of the moving object, an amplitude calculator calculating the amplitudes of the detection signals, a dropout detector detecting dropouts of the detection signals, a time keeper keeping detection times of the dropouts, a switching-time calculator calculating signal switching times, a storage memory storing the velocities, the amplitudes, and the signal switching times, and an output selector selecting one of the velocities stored in the storage memory based on the amplitudes and the signal switching times and outputting the selected velocity.
Abstract:
An image display apparatus for displaying an image on a panel having pixels each including a plurality of subpixels of different colors includes an interpolation operator interpolating consecutive sampling values of pieces of input color data to correct phases of the pieces of input color data on the basis of positions of the subpixels in each pixel and output pieces of output color data; an area detector detecting a specific area from the image displayed on the panel by processing the input color data or the output color data; and a correction unit computing and outputting weighted averages of the pieces of input color data and the pieces of output color data on the basis of a detection result obtained by the area detector. The specific area is an edge portion, a portion where a luminance level gradually changes, or a repeated-pattern portion where a spatial frequency is high.