Westinghouse Electric Corporation

Westinghouse Electric Company LLC

Other

Leonard J Balog

Arthur W Kramer

Bruce W Bevilacqua

Donald G Sherwood

Harry N Andrews

Ronald J Hopkins

David E Boyle

Robert W Beer

Thomas A Hackley

Edmund C Eglinton

Joseph W Gulaskey

A lower internals nuclear reactor structure having a tubular core barrel with an upper and lower open end, coaxially supported therein. A reflector having an outside curvature that substantially matches the curvature of the inside surface of the core barrel and substantially contacts the inside surface substantially over an axial length of the core, is fixedly connected to the inside surface of the core barrel at a plurality of axial and circumferential locations to be substantially supported by the inside surface of the core barrel.

Modular radial neutron reflector

A method is provided for removing radioactive internals structural members in the core of a reactor pressure vessel in a containment vessel. The method includes placing a first cask in a first internals assembly, detaching radioactive first internals structural members from second internals structural members in the first internals assembly, placing the detached first internals structural members in the first cask, placing the first internals assembly in a second cask, and removing the second cask containing the first internals assembly and containing the casked detached radioactive first internals members from the containment vessel. The first internal members may be radioactive baffle plates, and the second internals members may be former plates bolted to the radioactive baffle plates. Novel tooling, framework and fixtures facilitate disassembling, moving and storing the radioactive baffle plates.

Method and tooling for dismantling, casking and removal of nuclear reactor core structures

An assembly has a base of elastomeric material and a frame for an emblem or ornament. A fastener portion of the frame fits with a stem portion of the base in fixed relation. The base is secured to a surface, such as a vehicle hood, by an adhesive, with no elements through the attachment surface being required. The base is elastic to yield to anticipated forces, such as due to wind, automatic car washes, and manual pulls or pushes, and to return to its intended position, without disturbing the adhesive bond. Base designs include having a stem at an angle to a normal to the base bottom or mounting surface; the amount of such angle being determined to make the emblem be presented in an upright or moderately canted back, position when the assembly is installed on any of a number of vehicles having a range of hood slopes; so that substantially all vehicles and hood slopes in use can be fitted with one of only a small number of base configurations. Economy of construction and ease of installation, including a method that gives an ordinary user correct alignment and orientation, enhances usability of the assembly. Emblems may be selected from a wide variety including some that are replaceable or allow placing a new one on a prior one. The same frame emblem support can also serve, without the fastener portion, as a separate ornamental item, such as a pendant, that can be coordinated with that on a vehicle.

Emblem mounting assembly

An apparatus and method are provided for replacing the existing lower internal components in a nuclear reactor vessel with new components. The alignment of the new lower internals to the pressure vessel and the existing upper internals is achieved by customizing the new lower internals on-site based on alignment measurements obtained by gages installed on the new core barrel and the existing upper core plate. The gages allow the custom machining of radial support keys on the lower portion of the new core barrel and the custom drilling of upper core plate alignment pin holes in the new core barrel.

Apparatus and method for replacing internal components in a nuclear

A mounting system for removably mounting the lower flange of the control rod guide tube over an opening in the upper core plate of a nuclear reactor is disclosed. The system includes a pair of resilient pin members and a pair of reinforcing pin members. The resilient pin members are mounted in a passage formed through first opposing sides of the guide tube lower flange. They are resiliently receivable in first bores formed on first opposing sides of the upper core plate to permit deflection thereof when the guide tube is subject to normal shear loads. The resilient pin members bear substantially all of the normal shear load to which the guide tube is subjected. The reinforcing pin members are mounted on the second opposing side of the guide tube lower flange. They are receivable in second bores formed on the second opposing sides of the upper core plate with a clearance. The reinforcing pin members bear substantially all of the abnormal shear load that exceeds the normal shear load. The clearance between the reinforcing pin members and the second bores limits the deflection of the resilient pin members. After the resilient pin members deflect the distance limited by the clearance, the reinforcing pin members bear any additional abnormal shear loads and prevent the additional abnormal shear loads from bearing on the resilient pin members.

Four pin mounting system for nuclear reactor control rod guide tubes

An apparatus and method for under water remote replacement of the screws which secure together first and second structures in the internal region of a nuclear reactor core, wherein the screws are received and counterbored screw bores in the first structure. First, one or more lateral recesses are machined in the side wall of the counterbore portion. Then an external hex head screw with a shoulder flange is inserted in the screw bore and is threadedly engaged with the second structure with the flange seated in the counterbore portion. A locking cup with a central hex opening is fitted over the hex head of the bolt in the counterbore portion. Then a bifurcated die is seated against the first structure with die fingers extending into the cup, and a drive member is driven through the die coaxially with the screw to move the die fingers against the side wall to deform it into the recesses, thereby locking the assembly in place.

Locking screw apparatus and method for underwater remote replacement

A method of rapidly retubing a steam generator while it is vertically oriented in a containment vessel and keeping the level of radiation to which workmen are subjected at a minimal level.

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Naples, FL, United States of America

Leonard J Balog