Abstract: A foundry mold or core blowing premix nozzle for use in connection with the kold core process. The nozzle contains a mixing chamber that allows thorough mixing to occur during the blowing process. Immediately after the blowing operation the nozzle may be cleaned of any residual sand/catalyst/resin mixture which would ordinarily set up and clog the nozzle if allowed to remain within the nozzle. This cleaning feature is provided by a push through shuttle that sweeps the mixing chamber and moves a turbulence inducing baffle, normally positioned within the chamber, to a position external to the nozzle where it may readily be cleaned.

Abstract: An improved photographic process in which the images on exposed plates are intensified by replacing the silver grains in the photographic plate with an element having more favorable nuclear properties than the replaced silver, and forming a secondary image by autoradiography, which in some cases is produced after activation of the plates by exposure to a neutron flux.

Abstract: An adjustable wall penetration framing member which is adjustable at any point by raising or lowering an adjustment screw and which prevents the infiltration of water and air into the interior of a building through the adjustable member.

Abstract: A compactable control element assembly for a nuclear reactor in which the absorber pins of the assembly are compacted during downward movement of the pin and are returned to their uncompacted state when downward movement is stopped. The control element assembly comprises a support member longitudinally movable within a control assembly duct and a pluraity of absorber pins supported laterally outward of the support member and within the duct by pairs of support arms. The absorber pins are pivotably mounted to the support arms and the support arms in turn are supported from the support member for upward pivotable movement in a longitudinal plane. As the support member is moved downward, the support arms pivot upwardly and the absorber pins move upwardly and inwardly towards the support member. When the support member is stopped the absorber pins return to their uncompacted position.

Abstract: A linear motion device of the type having a plurality of gripper assemblies for engaging projections on a linearly movable element to effect stepwise movement thereof. Each of the gripper assemblies is movable into and out of engageable relationship with the element to thereby yield three relative positions between the element and the gripper assembly--a latched position, a coupled position and an unlatched position. Also, each of the gripper assemblies is movable relative to its support means between respective raised and lowered positions. The gripper assemblies are supported on the support means in spaced relationship and the projections are spacedly positioned on the element so that each gripper assembly, when in its lowered position relative to the support means, can be moved into the coupled position with respect to the element when the other gripper assembly is in its latched position and is in either its raised position or lowered position relative to the support means.

Abstract: A turbine follow system and method for pressurized water reactors with a multiplicity of load bypass valves to provide a substitute load upon a load rejection by shunting excess steam around the load to a condenser. The system provides a circuit whereby not more than one valve is opened on any one system or operator error by utilizing circuit redundancy and a permissive gate operated by one of the redundant circuits.

Abstract: A turbine follow system and method for Pressurized Water Reactors utilizing load bypass and/or atmospheric dump valves to provide a substitute load upon load rejection by bypassing excess steam to a condenser and/or to the atmosphere. The system generates a variable pressure setpoint as a function of load and applies an error signal to modulate the load bypass valves. The same signal which operates the bypass valves actuates a control rod automatic withdrawal prevent to insure against reactor overpower.