Abstract: A device for ejecting a weapon from a submergible launch tube includes a nt door and a rear door. The device has an inner tube inside the launch tube and shaped to receive a weapon. The device also has holder elements for holding the inner tube in the launch tube and a pump device for circulating fluid between a front and a rear of the launch tube and the inner tube at a high flowrate.

Abstract: A hanger of steel for guiding a missile in a launcher has arcuate flanges matching the shape of the missile an a guiding element of substantially T-shaped cross section. A longitudinal recess is defined on the outer side of the transverse bar of the "T". The surfaces of the transverse bar facing the flanges define rest surfaces and the adjacent lateral surfaces of the vertikal bar of the "T" serve as lateral guiding surfaces for the missile. A longitudinal, rounded recess is provided between each of the lateral surfaces and the adjacent rest surface, in order to increase the notch radius. The surface of the material is treated to generate internal compressive stress in the regions of the recesses.

Abstract: Fuel rod 2 has a fuel cladding tube 3, and upper end plug 5 and a lower end plug 6 welded to the ends of fuel cladding tube 3. He gas 1 and U pellets 4 are filled in the fuel cladding tube 3. The He gas pressure 1 is about 8 atm, and the average crystal grain size of the U pellet 4 is in the range of 30-60 .mu.m. The fuel rod can be manufactured at a lower manufacturing cost, while maintaining the fuel integrity the same as in a conventional fuel rod.

Abstract: A known gas operated firearm has been modified to be of more compact size and reduced weight while retaining the firepower, the features, and most of the components of its predecessor. A bolt assembly reciprocably mounted in a longitudinal cavity of a receiver assembly for movement between recoil and battery positions has a forwardly facing pressure surface and first and second longitudinally extending coaxial bores. The annular flange of a firing pin is slidable in the second bore and the bolt assembly includes a transversely extending retaining pin engageable by the annular flange to define an aftward terminal position of the firing pin. A recoil assembly includes a pair of tungsten weights mounted in the longitudinal cavity for rectilinear movement with the bolt assembly between the recoil and battery positions and includes means to bias the bolt assembly toward the battery position.

Abstract: A method of replacing a boiling water reactor core shroud includes the steps of removing at least a portion of the existing core shroud from supporting structure in the reactor vessel, lowering a replacement shroud into the reactor vessel, positioning the replacement shroud on the supporting structure such that a bottom portion of the replacement shroud mates cooperatively with the supporting structure to limit lateral movement of the replacement shroud relative to the reactor vessel, and holding the replacement shroud assembly in place by applying axially compressive forces to the shroud in the direction of the supporting structure. If the existing core shroud is secured by welds, a parting cut is made to remove the shroud and the replacement shroud is held in place by securing a plurality of tie rods between sites on the replacement shroud and the supporting structure at a respective plurality of angularly spaced locations about the shroud periphery.

Abstract: A search angle selection system generates a search angle for a torpedo in sponse to a number of inputs. Initially, the system bounds the region to be insonified. The system determines the search angle which best insonifies the region from the surface down to the target's keel depth out to the maximum acquisition range of the torpedo, for each search depth accounting for the torpedo's attack angle. The system determines a set of attainable aimpoints along the surface which are based on the environmental and weapon parameters. It then finds rays which intersect the aimpoints and uses the ray angles to determine an optimal beam steering angle. For each search depth, the system categorizes the sound speed profile between the search depth and the surface, and determines the maximum range that can physically be reached from the search depth. Using the maximum range and the weapon's range gate, a maximum aimpoint is established.

Abstract: A bullet-proof fabric containing a first layer of high-strength fabric, a first layer of ceramic material below the first layer of high-strength fabric, and a second layer of high-strength fabric disposed below the first layer of ceramic material. The first layer ceramic material contains a multiplicity of ceramic structures, each of which has a first orifice extending through it, and a means for fastening the ceramic structure disposed within the orifice.

Abstract: A deception system for deceiving enemy forces including a launcher, and pyrotechnic ammunition which is launched from the launcher and exploded at a location away from the launcher, wherein the pyrotechnic ammunition includes: a detonation mechanism which is set to detonate at the location away from the launcher, and pyrotechnic explosive material which is detonated by the detonation mechanism. When the pyrotechnic explosive material is detonated, a muzzle flash effect is created, and the muzzle flash effect is substantially similar to a real muzzle flash.

Abstract: A search angle selection system determines acoustic homing beam offset ans to be used by a torpedo from a group of target depth conditions in response to given environmental, tactical, target and weapon information. The system optimally bounds the region that is to be insonified. The system determines the search angle which best insonifies the depth band, that is, the region between the upper depth bound and the lower depth bound, for each search depth, accounting for the weapon's attack angle, including search depths which are not in the depth band itself. For each search depth, the system determines the relative depth separation of the search depth from each of the bounds, and based on this separation an aimpoint which projects from a reference plane through the torpedo is chosen at the depth of each bound. The aimpoint is selected from a table of empirically-determined values.

Abstract: A false target deployment system including an inflatable and collapsible decoy packaged in a munition for deploying the decoy in its collapsed state from an actual target at risk due to a potential threat. The decoy is rapidly inflated during deployment and the decoy includes coatings and/or other devices for emulating the infrared, radar and/or laser reflectivity characteristics of the actual target thereby providing a false target for the threat.

Abstract: The ferrule spacer includes a ferrule having an elongated slot with a pair of tabs projecting laterally into the slot. An elongated spring has opposite ends bearing against the interior wall of the ferrule and flats overlying the tabs along the outside of the ferrule. The mid-span portion of the spring projects in a central aperture between the ferrule tabs for biased bearing engagement against the fuel rod. The fuel rod is maintained against oppositely disposed stops formed on the ferrule. The spring is inserted and removed from the inside of the ferrule.

Abstract: A reactor core for a boiling water reactor, a fuel assembly and a control rod intended for Pu multi-recycling at a breeding ratio of about 1.0, or 1.0 or more while keeping the economical or safety performance to the same level as in a boiling water reactor now under operation. The reactor has an effective water-to-fuel volume ratio of 0.1 to 0.6 by the combination of a dense lattice fuel assembly constituted of fuel rods formed by adding Pu to degraded uranium, natural uranium, depleted uranium or low concentrated uranium, and having coolants at a high void fraction of 45% to 70% and a cluster-type, Y-type or cruciform control rod.

Abstract: A device for catching cartridges ejected from a fired weapon. The device includes a fabric catch bag mounted on a frame and attached by means of a swivel mount to an extendable, base-mounted support rod. The frame may rotate about an axis parallel to the support rod or may pivot vertically. Cartridges ejected from a gun being fired adjacent to the bag will enter the bag and be contained therein, rather than falling onto the ground.

Abstract: Methods for sealing cracks adjacent stub tube attachment welds in a reactor pressure vessel of a nuclear reactor are described. The reactor pressure vessel includes at least one stub tube through which a control rod housing extends. The control rod housing is attached to one end of the stub tube with an upper stub tube attachment weld. In one embodiment, a sidewall of a control rod drive housing is cut at a location below the upper stub tube attachment weld to form a weld passage in the control rod drive housing between the control rod drive housing and the stub tube. A weld is then formed in the weld passage so that it is in physical contact with both the stub tube and the control rod housing, and thus seals the control rod drive housing against the stub tube.

Abstract: The measurement device includes a means (18) for leaktight passage of a measurement conduit (20), produced in the form of a thimble, and an element (25) for connecting the end of the measurement conduit (20) to a smooth cylindrical extension element. The connection element (25) is produced in the form of a sleeve (26), the internal bore of which includes a first part (35) for receiving the measurement conduit (20) and a second part (36) for receiving the smooth cylindrical extension element. The connection element (25) includes, at the ends of the sleeve (26), a first removable means (28) for fastening and leaktight passage of the measurement conduit (20), and a second removable means (30) for fastening and leaktight passage of the smooth cylindrical extension element. The invention applies both to mobile-probe devices for measuring in the core of the reactor and to fixed-probe measurement devices.

Abstract: A composite zirconium alloy component that exhibits a reduced propensity for irradiation growth and enhanced corrosion resistance when in a radiation field. The component is formed to have an inner core and two oppositely-disposed outer layers that are metallurgically bonded to the inner core. The inner core and the outer layers are formed from two different zirconium alloys, with the inner core alloy contributing to the ability of the component to resist dimensional distortions as a result of irradiation growth, while the outer layer alloy contributes to the ability of the component to resist corrosion. As such, the alloys are combined within the component in a manner that exploits the different corrosion and irradiation-resistance properties of the alloys.

Abstract: A method for mitigating crack growth on the surface of stainless steel or other metal components in a water-cooled nuclear reactor. A compound containing a noble metal, e.g., palladium, is injected into the water of the reactor in the form of a solution or suspension. This compound has the property that it decomposes under reactor thermal conditions to release ions/atoms of the noble metal which incorporate in or deposit on the interior surfaces of the crack. The compound may be organic, organometallic (e.g., palladium acetylacetonate) or inorganic in nature. The palladium deposited inside a crack should exhibit catalytic behavior even if the bulk surface palladium is depleted under high fluid flow conditions. As a result, the electrochemical potential inside the crack is decreased to a level below the critical potential to protect against intergranular stress corrosion cracking.

Abstract: Infrared absorbing compositions useful as high solid coatings comprising 5-50% of a volatile solvent portion and 50-95% of a non-volatile portion which comprises a film-forming binder having dispersed within the binder opacifying polymeric beads and an infrared radiation absorbing pigment selected from the group consisting of copper phosphate, basic copper phosphate, copper pyrophosphate, tungsten trioxide and mixtures thereof.

Abstract: A self-contained magazine for a firearm includes a housing for receiving a plurality of rounds therein, the housing including an open end through which rounds are loaded and unloaded, a follower provided in the housing, said follower being slidable along a longitudinal axial direction of the magazine, a spring biasing the follower toward the open end, to bias rounds toward the open end, an electronic counter means integrated in the magazine for calculating the number of rounds contained in the magazine upon loading rounds into and unloading rounds from the magazine, and display means for displaying the number of rounds in the magazine. The present invention provides a self-contained magazine for a firearm that incorporates all essential features for calculating and displaying the number of rounds therein as the number changes due to loading and unloading.

Abstract: A bottom head dome assembly which includes, in one embodiment, a bottom head dome and a liner configured to be positioned proximate the bottom head dome is described. The bottom head dome has a plurality of openings extending therethrough. The liner also has a plurality of openings extending therethrough, and each liner opening aligns with a respective bottom head dome opening. A seal is formed, such as by welding, between the liner and the bottom head dome to resist entry of water between the liner and the bottom head dome at the edge of the liner. In the one embodiment, a plurality of stub tubes are secured to the liner. Each stub tube has a bore extending therethrough, and each stub tube bore is coaxially aligned with a respective liner opening. A seat portion is formed by each liner opening for receiving a portion of the respective stub tube. The assembly also includes a plurality of support shims positioned between the bottom head dome and the liner for supporting the liner.