Abstract: A top guide to shroud head interface is described. In one embodiment, the interface includes a top guide that includes a flange that is configured to engage a corresponding flange of the shroud head. The top guide flange includes a plurality of frusto-conical shaped guide pins extending from the top surface of the flange. The shroud head flange includes a plurality of guide pin openings configured to align with the guide pins located on the top guide flange. Each guide pin opening includes a frusto-conical portion that extends through the flange from the bottom surface of the shroud head flange and has a slope equal to the slope of the frusto-conical pins. Each guide pin opening also includes a cylindrical portion that extends from the small base of the frusto-conical portion of the guide pin opening to the top surface of the shroud head flange.

Abstract: A device for carrying out a surveillance program to monitor the environmental effect of radiation and high-temperature oxygenated water on the shroud material in an operating reactor. The device is a holder containing shroud material specimens and encapsulated neutron flux monitors. The holder is installed on the shroud wall and left in place for a predetermined period of reactor operation time for the purpose of monitoring the neutron fluence effect on the shroud material specimens housed in the holder. The specimen holder is later removed from the reactor. The specimens are removed from the holder and examined in a laboratory to determine any changes in material properties. The specimen holder comprises a bolt-like device having a hollow head and a threaded shaft. The hollow head provides space for material specimens and neutron flux monitors. The specimen holder is attached to the shroud wall by screwing the threaded shaft into a threaded hole in shroud wall.

Abstract: Methods and apparatus for polishing seal surfaces in a nuclear reactor are described. One embodiment of the apparatus includes a universal joint which has a universal joint housing and a drive shaft extending therefrom. A polishing plate is secured to the universal joint housing. A working surface of the polishing plate is configured to polish the seal surfaces. The seal surfaces of incore monitor housings and valves may, for example, be polished using various embodiments of the apparatus.

Abstract: The present invention relates to a metering dispenser attachment for packaged fluent products, and more particularly to a dispenser attachment adapted to be mounted on an exterior surface of the package for cooperation with an existing dispensing opening. A metering chamber is included for receiving products through the dispensing opening and accumulating a predetermined amount when the package is turned upside down. Dispensing of the accumulated product is then achieved when the package is turned right side up.