Abstract: A device control apparatus which can remotely control an information processing apparatus on a network using an internal device is provided. The device control apparatus 20 transmits virtual device identification information 204 identified for recognizing the internal device 40 as a device under virtualization control to the information processing apparatus 10, relays data communication using USB data performed with the internal device 40 while the information processing apparatus 10 performs virtualization control on the internal device 40 based on the virtual device identification information 204, and converts the relayed USB data into a first data format used for data communication with the internal device 40 and into a second data format used for data communication with the information processing apparatus 10.

Abstract: Disclosed is a technique for setting a body frame for a pattern and collectively deleting an area located outside the body frame. Consecutive codes can be assigned to scanned patterns.

Abstract: An image process is performed using a computer, without needing any special knowledge by a user. First, when a picture on a screen is designated and inputted by an input unit, a check is made to determine if an input figure name corresponding to the input figure is defined in a first table stored in a memory. When it is judged that the input figure name is defined, a setting method of a value of a variable in the first table is determined. On the basis of the determined setting method, the value is set into the variable shown by the variable name in the first table. A check is made to determine if a figure shown by a connected figure name which is defined in a second table stored in the same memory as that of the first table, and is interlocked with the variable shown by the variable name exists on a screen. When it is judged that such a figure exists, the figure shown by the connected figure name is edited and displayed on the basis of the display type in the second table.

Abstract: A figure pattern is processed by modifying a point array that forms the figure pattern. The modification may include moving the points of the array, inserting points into the array, deleting points of the array, and changing the attributes of the points or the point array. According to one arrangement, a sample point of an array forming the outline of a figure pattern is designated for deletion and a figure pattern corresponding to the sample point array is generated on the basis of an attribute of sample points adjacent to the sample point designated for deletion.

Abstract: A change in magnification of a figure pattern within a predetermined area is performed by designating a desired rectangular frame or one point on a screen, A plurality of menus associated with figure processes are performed by interruption,

Abstract: A fuel assembly has part length and full length fuel rods, and a pair of large-diameter water rods which occupy an area which can accommodate 7 fuel rods. Natural uranium regions are provided in the upper and lower end portions of the effective fuel zone of the fuel assembly. An intermediate region between these upper and lower natural uranium regions provides an enriched uranium region which has three axial sections: an upper section, a middle section and a lower section. The middle section has the highest average enrichment, the lower section has the medium average enrichment and the upper section has the smallest average enrichment. The difference in the average enrichment between the middle section and the lower section is smaller than that between the middle section and the upper section. The upper section has a lower concentration of burnable poison than other sections of the enriched uranium region.

Abstract: A core construction for boiling water nuclear reactor in which a multiplicity of core units each having four fuel assemblies disposed in a square pattern adjacent to a control rod are arranged to form a reactor core, wherein the reactor core comprises control cells comprising four fuel assemblies which have been in the core more than three cyclic periods. The fuel assemblies located in the outer peripheral portion of the core are fuel assemblies which have been in the core more than three cyclic periods. Most of the core units comprise four fuel assemblies of first-, second-, third- or fourth-burning cyclic periods. The core is rotationally symmetric by 90 degrees. The core can be divided into four identical 1/4 cores by two vertical planes passing axial center lines of the core. Each of the 1/4 cores is substantially mirror symmetric about a plane passing the axial center line of the core.

Abstract: A fuel assembly to be charged in a reactor core comprises a channel box extending vertically in the core and having a substantially square cross section, a number of fuel rods arranged in the channel box in the form of a lattice in cross sections thereof, the fuel rods extending vertically in the channel box with spaces between each other, a plurality of spacers for supporting the fuel rods in the channel box so as to maintain axial spaces between the fuel rods and upper and lower tie plates for supporting upper and lower end portions of the fuel rods. The fuel rods include first type fuel rods arranged at and near four corner portions of the channel box, each of the first type fuel rods being composed of upper and lower areas, except for extreme upper and lower ends, in which a fuel enrichment of the upper area is made lower than that of the lower area.

Abstract: A fuel assembly for a nuclear reactor includes a number of fuel rods filled with a fuel material. A plurality of fuel rods have a partial effective fuel area filled with a fuel material and has a portion in which enrichment of a fissile nuclide is significantly reduced or the fissile nuclide does not exist at all on an axial level including a reactor shut-down zone at which subcriticality becomes small during a reactor operation period. The other fuel rods are filled with the fuel material throughout the entire axial length thereof. The first mentioned fuel rod may be provided with a partially interposed zone or may be constructed by a fuel rod having a length shorter than that of the other fuel rod. The tube means may be arranged in the fuel assembly so as to pass the moderator therethrough.

Abstract: A fuel assembly for a nuclear reactor comprises a fuel bundle in which a number of fuel rods are regularly arranged and a channel box surrounding the outer periphery of the fuel bundle. The interior of the channel box is designed so that the inner cross sectional area of the channel box increases from the upstream side of the coolant flow towards the downstream side thereof, for example, by stepwisely shaving the inner surface of the channel box. The corner portions of the channel box may be chamfered to improve the stress due to the inner pressure.

Abstract: A fuel assembly for a nuclear reactor includes a number of fuel rods filled with a fuel material. A water rod having a cross sectional area larger than that of each fuel rod is disposed at substantially the central portion of the fuel assembly. The fuel rods include first fuel rods having a whole effective fuel zone filled with a fuel material throughout the entire length thereof and second fuel rods each having an interposed zone in which enrichment of a fissile nuclide is significantly reduced or the fissile nuclide does not exist at all. The second fuel rods are arranged so as to surround the water rod so that the interposed zones are positioned on an axial level including a portion at which subcriticality is made small at a period in which maintenance of reactor shut-down margine is made difficult during the reactor operation period.