Abstract: The printed circuit board for mounting electronic parts thereon is obtained by transferring flux from a supporting film to the surface of a printed circuit board, and soldering the electronic parts thereto after the supporting film is removed. The supporting film is first coated with the flux, and the flux is transferred to the printed circuit board through the application of heat and pressure. Hot air can be blown from an oblique direction on the flux-coated surface of the printed circuit board after the flux is transferred thereto and before the electronic parts are soldered thereto.This method can provide a uniform flux coat on the printed circuit board and can eliminate various drawbacks which are encountered in conventional approaches in which the surface of the printed circuit board is coated directly with flux in liquid form.

Abstract: A method and an apparatus for detecting failure of nuclear fuel by means of a multi-handle automatic sipper, which comprises a shipper capping operation of mounting a sipper cap of the apparatus for detecting failure of nuclear fuel on the top part of fuel assemblies, an isolation operation of supplying air into the cap after completion of sipper capping operation, thereby forming an air layer, and isolating the fuel assemblies to be detected from other fuel assemblies, a soaking operation of keeping the fuel assemblies in the isolated state for a predetermined period of time, a cell water removal operation of discharging water from system, and a sampling operation of introducing a predetermined amount of cooling water in the fuel assemblies to a sample water receptacle, the operations being provided in sequence, and other operations being carried out in parallel with the aforementioned operations.

Abstract: An apparatus for detecting failure of the nuclear fuel rod has an outer cap and 16 (sixteen) inner caps. In checking for any faulty fuel rods, the outer cap is placed to cover the upper ends of 16 (sixteen) fuel assemblies mounted in the reactor core, while the inner caps in the outer cap are disposed on corresponding one of the fuel assemblies. To the outer cap are attached 4 (four) air supplying hoses. The inner caps receive corresponding one of 16 sampling tubes attached to the outer cap, and coolant sampling hoses are connected to the sampling tubes. A bundle member is fixed to the center of the upper surface of the outer cap. The four air supplying hoses and 16 coolant sampling hoses are fixed to the bundle member. The bundle member has a handle attached thereto.

Abstract: Apparatus including two types of cutting means or roller cutters and shears for cutting a channel box for a fuel assembly for a nuclear reactor and method therefor. The roller cutters and shears are located in the lower portion of a casing having inserted thereinto the channel box from which the fuel assembly has been removed, with the shears being located beneath the roller cutters. The roller cutters continuously cut the channel box axially thereof, while the shears shear the axially-split portions of the channel box in a direction intersecting the center axis of the channel box. Means for outwardly expanding the axially-split portions of the channel box is provided between the roller cutters and the shears. Means for downwardly moving the channel box in the casing is inserted in the casing. Means for drawing off coolant from the casing to clean the latter is connected to the upper portion of the casing.

Abstract: A nonvolatile semiconductor memory apparatus is provided which comprises a flip-flop circuit formed of a pair of MOS FETs and a pair of MNOS FETs coupled to the bistable output terminals of the flip-flop circuit, respectively. The memory apparatus further has a pair of MOS FETs coupled to have the current paths in parallel with the current paths of the pair of MOS FETs of the flip-flop circuit.

Abstract: A double effect absorption refrigerating system having improved thermal efficiency is provided wherein a solution concentrated by a high pressure generator is, after being used to raise the temperature of a weak solution fed to the high pressure generator and before being fed into a low pressure generator, heated with heat energy transferred thereto from a refrigerant passed through a tube within the low pressure generator.

Abstract: A double effect absorption system having improved thermal efficiency is provided wherein a part of a weak solution fed from an absorber to a high pressure or first generator is bypassed to a second generator and the bypassed solution is transferred with the heat energy from refrigerant passed through a tube within a low pressure or second generator.