Abstract: The present invention is a modular stock system for rifles. The system replaces the rifle's buffer tube with a modified one containing a mount for a constant cheek weld and a rail track for adjustment. A stock module then mounts on the replacement buffer tube. The stock module is interchangeable depending on the user's needs. Various configurations of the stock module are discussed, including adjustable stocks, fixed stocks, and specialized stocks. The stock module may be made even further modular by the addition of rail system.

Abstract: A primary lid is set in a top opening of a vessel body that contains radioactive substance, and closes the top opening. The peripheral edge portion of the primary lid is welded to the inner peripheral surface of the vessel body. As the primary lid is welded, steam in the vessel body is discharged to the outside through a discharge hole in the primary lid, and a shield gas is filled into or run through a space in the outer peripheral portion of the primary lid, so as to prevent the steam from flowing into the welding portion.

Abstract: A neutron spectrometer is provided by a series of substrates covered by a solid-state detector stacked on an absorbing layer. As many as 12 substrates that convert neutrons to protons are covered by a layer of absorbing material, acting as a proton absorber, with the detector placed within the layer to count protons passing through the absorbing layer. By using 12 detectors the range of neutron energies are covered. The flat embodiment of the neutron spectrometer is a chamber, a group of detectors each having an absorber layer, with each detector separated by gaps and arranged in an egg-crate-like structure within the chamber. Each absorber layer is constructed with a different thickness according to the minimum and maximum energies of neutrons in the spectrum.

Abstract: Method for controlling the level of iron in feedwater of a BWR wherein an iron-containing sacrificial electrode in placed contact with the feed water dissolution of the electrode is induced at a rate which provides a desired level of iron in the feedwater.

Abstract: A vortex-assisted pressure control system is provided for controlling fluid flow into an inlet formed in a vehicle where such fluid flow into the inlet occurs during vehicle movement. Vortex generator(s) is (are) positioned forward of the inlet with respect to forward movement of the vehicle to generate streamwise vortices in the fluid as the vehicle moves through the fluid. Each vortex generator is controllable to adjust strength of the streamwise vortices and a lateral position of the streamwise vortices relative to the inlet. Sensors are used to i) detect the lateral position of the streamwise vortices relative to the inlet, and ii) pressure of the fluid that has entered the inlet. A controller adjusts the vortex generator(s) based on sensor measurements in order to control the lateral position of the streamwise vortices and the pressure of the fluid entering the vehicle via the inlet.

Abstract: A replacement cylinder that enables the use of modern smokeless gunpowder in a black powder muzzle-loading revolver is provided. The cylinder includes a main cylinder body and a removable cylinder cap. The main cylinder body includes a number of chambers, each of which having a projectile portion, a propellant portion and a primer portion. The cylinder cap includes a number of captured firing pins positioned therein. During operation, the cylinder cap is allowed to axially translate relative to the main cylinder body. A method of muzzle-loading the cylinder of the invention using modern smokeless gunpowder and a primer is also provided and is facilitated by the provision of a loading plate.

Abstract: A neutron spectrometer for aircraft is provided by a series of substrates covered by a solid-state detector stacked on an absorbing layer. As many as 12 substrates that convert neutrons to protons are covered by a layer of absorbing material, acting as a proton absorber, with the detector placed within the layer to count protons passing through the absorbing layer. By using 12 detectors the range of neutron energies are covered. The preferred dodecahedron embodiment of the neutron spectrometer is a solid, polyethylene dodecahedron assembly with 12 surface facets covered by a solid-state detector stacked on an absorbing layer composed of tantalum. Each absorbing layer is constructed with a different thickness according to the minimum and maximum energies of neutrons in the spectrum.

Abstract: A firearm having an improved action for a muzzleloading firearm which allows the toolless field removal of the firing system for inspection, cleaning and repair. The system provides for quick release, removal and reinsertion of the firing system while maintaining safe and secure operation of the firearm during firing.

Abstract: A primer removal tool comprising a starter tap, a holder for the starter tap, one or more setscrews passing through the holder and against the starter tap for securing the starter tap in the holder, a handle, a spacer bushing connected to the center of the handle, a shaft having one end connected to the starter tap holder and the other end connected to the spacer bushing, and a knurled slider on the shaft, the slider being constrained to slide between the holder and the spacer bushing. The starter tap is inserted into the center of the damaged primer; the tool is held parallel to the centerline of the cannon bore while applying forward pressure; the handle of the tool is rotated clockwise to run the tap into the primer a few turns; and the handle of the tool is rotated counterclockwise one-quarter of a turn. These steps are repeated until most of the tap is in the primer chamber. Next, the slider is gripped, pushed forward toward the primer chamber, and then quickly pulled backward against the spacer bushing.

Abstract: A fuel element for a nuclear reactor has fuel rods with nuclear fuel guided through spacers. The spacers are equipped with devices that exert a swirling impulse upon a coolant flowing along the fuel rods. In order to present as little flow resistance as possible for the coolant, these swirl-introducing devices have the form of a vane with a spoonlike or bladelike shape and they extend into the coolant flow. Owing to the shape—here the vane is curved in the longitudinal and in the transverse directions—practically all cross sections of the vane have such a high geometrical moment of inertia that even a vane made of a thin sheet metal is sufficiently rigid. Fuel elements configured according to the invention are particularly suitable for use in boiling water nuclear reactors.

Abstract: A system is provided for generating high-energy particles and for inducing nuclear reactions. The system includes a laser and for emitting a laser beam, an irradiation target for receiving the laser beam and producing high-energy particles, and a secondary target for receiving the high-energy particles, thereby inducing a nuclear reaction. A method is also provided including producing a laser beam of high-intensity with an ultra-short pulse duration, irradiating the laser beam onto an irradiation target in order to ionize the irradiation target and produce a collimated beam of high-energy particles, and colliding the collimated beam of high-energy particles onto a secondary target containing a nuclei, thereby inducing a nuclear reaction on the secondary target.

Abstract: One object of the present invention is to provide a production method for a nuclear fuel assembly support grid that improves the corrosion resistance of welded parts without impairing the characteristics of the support grid so as to be able adequately withstand highly efficient operation. In order to achieve the object, the present invention provide a production method for a nuclear fuel assembly support grid comprising the steps of: assembling a plurality of straps in a grid form; welding intersections of each strap; and carrying out annealing thereafter to precipitate an intermetallic compound on the welded parts.

Abstract: A gun barrel having a muzzle brake (2), especially for large-caliber guns, in which the muzzle brake (2) includes a tubular piece that has openings (16) around its circumference, and a jacket tube (4), which surrounds the tubular piece and has diametrically opposite gas-exit openings (17) that extend perpendicular to the bore longitudinal axis (15). To provide an arrangement comprising a barrel (1) and a muzzle brake (2) that minimizes the firing stresses on the parts of the muzzle brake (2) that are detachably connected to the barrel (1), the muzzle region (3) of the barrel (1) itself is used as a component of the muzzle brake (2. That is, the muzzle region of the barrel is provided with a plurality of openings (16) arranged in ring formation around the barrel (1), and the attached the jacket tube (4) is provided with slot-shaped gas-exit openings (17) over this muzzle region (3).

Abstract: A night-vision optical device of the invention with controlled life expectancy contains a time measuring device built into the housing of the aforementioned device for measuring the accumulated time of active work of the device. In application to a night scope for a firearm, the device also contains a sensor, which is interlocked with activation of the scope and reacts on the shots produced from the firearm in general and separately on those shots produced during active work of the night-vision optics at nighttime. The aforementioned shots of both types are counted and stored in separate memory units. The night-time shots affects the life expectancy of the night-vision optics because of muzzle flashes which cause such devices as an image intensifier to work with an increased light load. The information obtained from the time measuring device and the shot counter makes it possible to timely receive a warning signal about the fact that the night optics or the entire firearm must be replaced.

Abstract: A firearm locking device increases firearm safety and security. A receiver cartridge shaped and sized with same caliber as firearm is loaded into bullet chamber. A barrel rod is removably engaged to the receiver cartridge and protrudes from the end of firearm barrel. Protruding end serves as fast visual indicator that firearm is unloaded and safe to handle, store, or display. A light pull on protruding end also serves as indicator that firearm is unloaded and safe. A lock and cable serve to lock the barrel rod to firearm's trigger guard to prevent removal of barrel rod from barrel.

Abstract: The present invention 10 discloses an illuminating recoil guide rod for use on a handgun 12 modified to include a highly illuminating LED or infrared light 26 for a night vision light source, a tilt or mercury switch 22 that will allow for user selectable starting angles of illumination when the firearm is drawn from the holster comprising a lens 24, battery or batteries 30, housing compartment 32, mercury angle switch 28, electronics 56, 58 and a manual on/off switch 28. The illuminating recoil guide rod 10 of the present invention is completely unobtrusive and is activated simply by drawing the firearm 12 from the holster and raising the barrel 36. The present invention provides for an additional element in the form of a wireless transmitter 56 and receiver 58 for illuminating the LED 26 only while a pressure sensitive pad 60 is depressed.

Abstract: A gun suitable for games is disclosed for permitting an operator to recognize when a trigger is pulled. A target signal receiver receives a target signal sent from a target for causing the gun to recognize that the gun is opposite the target, and notifies a controller that the target signal receiver has received the target signal. Upon detection of a manipulation by the operator, the controller a forces shooting device to perform a shooting operation, and instructs an information generator to generate recognition information. The shooting device emits an optical bullet formed of a light ray. The recognition information generator drives a solenoid to bring associated members into impact against each other to permit the operator to recognize that the operation has been performed.

Abstract: A reactor core (104) includes fuel assemblies (202) arranged in a loading pattern (1100) in response to corresponding power levels of the fuel assemblies (202). A crud deposition model (412) is used to predict crud deposition on the fuel assemblies (202) and fuel pins (300) within the fuel assemblies (202). The prediction of crud deposition enables generation of the loading pattern (1100) and design of lattice structures (1600) for the fuel assemblies (202) that results in the reduction of total crud deposition in the reactor core (104) and causes a substantially uniform crud deposition on the fuel assemblies (202) of the reactor core (104).

Abstract: Method and apparatuses are provided for removing thermal energy from a nuclear reactor, which are fault tolerant. The apparatus includes at least one heat pipe configured to absorb thermal energy produced by the nuclear reactor. In addition, the apparatus includes a first compartment thermally coupled to the at least one heat pipe. The first compartment is configured to contain a first gas. Furthermore, the apparatus includes a second compartment thermally coupled to the at least one heat pipe. The second compartment is configured to contain a second gas and configured to isolate the second gas from the first gas.

Abstract: A rifle scope system allows adjustment of the scope while a shooter maintains the shooting posture and the scope sight picture. The scope system comprises an adjustment system comprising an electromechanical mechanism that responds to a signal from a remote controller manipulated by the shooter without having to significantly disturb the shooting posture. The adjustment system allows the shooter to adjust the scope's point of aim to coincide with a bullet's point of impact at a target. Such adjustment can be performed either by the shooter. Alternatively, such adjustment could be performed by a processor configured to adjust the point of aim based on a ballistic parameter associated with the bullet or the shooting environment. The adjustment system allows such processor-determined adjustments to be effected in a quick manner.