Abstract: An arrangement for inhibiting low temperature gas-side corrosion of an out of service steam generator and its heat exchange and gas clean-up adjuncts. The arrangement provides for circulating pressurized heated air through the steam generator and its adjuncts, controlling the pressurization of the air to maintain positive gas-side pressure, controlling the heating of the air to maintain gas-side surfaces above the dew point, and returning the air which has passed through the steam generator and its adjuncts to the forced draft fan to be repressurized, reheated and reintroduced into the steam generator.

Abstract: A nozzle and thermal sleeve arrangement whereby the thermal sleeve maintains sealing contact with component parts of the nozzle during thermal expansion and contraction without giving rise to stress causing restraints.

Abstract: An apparatus and method whereby fuel is burned in serially connected furnaces under controlled combustion temperature and airflow conditions so as to inhibit the formation of nitric oxides while achieving complete combustion of the fuel.

Abstract: An apparatus for testing the similarity in cross section and the disposition of each relative to a common axis of a plurality of similar bores formed in a burner tip and distributed around the axis.

Abstract: A support system and method for supporting parallel tubes. A looped tube support clamp comprising a channel base with scalloped arcuate passages for tube support, the sides of the passages forming upright tabs containing a slotted hole suitable for the passage therethrough of a tapered forming tool causing a clamping action to result on the tubes adjacent the looped tab.

Abstract: An impeller comprising a pair of axially adjacent plate members. Each of the plate members is formed with a hub and a plurality of laterally spaced segments extending outwardly from the hub. The plate members are coaxially mounted on a burner nozzle guide tube, with the plate member nearest the nozzle outlet being fixed to the guide tube and the other plate member being rotatable about its central axis to regulate the free flow area between segments.

Abstract: A nuclear reactor pressure vessel nozzle penetration device for fluid coolant delivery to the reactor core or to modular heat exchangers located within the vessel is described. The nozzle penetration device comprises a nozzle conduit having an annular double wall open at one end with thermal insulation therebetween, having the outer wall end attached to a portion of the reactor pressure vessel and disposed radially therefrom forming an air space therebetween.

Abstract: A steam and water drum internal arrangement which provides free access to the drum inner wall and facilitates the removal of the steam and water separators from within the drum by mounting the separators on a duct which extends centrally of the drum and communicates with extension conduits to receive a steam and water mixture from the steam generating tubes.

Abstract: In an illustrative embodiment of the invention, a nuclear reactor pressure vessel, having an internal hoop from which the heated coolant emerges from the reactor core and passes through to the reactor outlet nozzles, is provided with sealing rings operatively disposed between the outlet nozzles and the hoop. The sealing rings connected by flexible members are biased against the pressure vessel and the hoop, establishing a leak-proof condition between the inlet and outlet coolants in the region about the outlet nozzle. Furthermore, the flexible responsiveness of the seal assures that the seal will not structurally couple the hoop to the pressure vessel.

Abstract: An illustrative embodiment of the invention provides a method and apparatus for magnetic inspection of areas of interest in ferromagnetic material by means of both alternating and direct current induced magnetic fields. Moreover, the magnetic fields may be pulsed sequentially and/or simultaneously to detect defects deep within the area of interest.

Abstract: An illustrative embodiment of the invention relates to a mechanical shock suppressor sensitive to velocity or acceleration of a predetermined level capable of restraining relative movement associated therewith of structures supported by the suppressor. The suppressor comprises frictional engaging portions having compressive means disposed thereon which increase the frictional restraining force only during movements of a predetermined level.

Abstract: An illustrative embodiment of the invention eliminates the circumferential thermal stresses found in a feedwater inlet nozzle of a once-through-vapor generator that are caused by the presence of steam in the nozzle during a low flow load condition. Specifically, The cold inlet feedwater is directed upwardly to fill and overflow the nozzle conduit and prevent steam entrance and collection in the nozzle, and then, impinges on a shroud which re-directs the flow downward into fluid flow contact with the nozzle conduit and through the vapor generator.

Abstract: A coal slurry drier which comprises a pulverizer having a housing enclosing a pulverizing zone including horizontally disposed upper and lower grinding rings. A circular row of rotatable grinding elements is positioned between the upper and lower rings. Heated carrier air is passed through the pulverizing zone. A conduit delivers the coal slurry to the pulverizer for drying and pulverization. The conduit includes an insulated portion extending through the housing and has its outlet located within the pulverizing zone.

Abstract: An improved distributor having a central inlet for receiving a stream of gas entrained particles to be divided into a plurality of effluent streams and including an open-ended standpipe disposed therein to maintain the central orientation of the incoming stream thereby attaining a pattern of recirculation which induces a steady flow and uniform distribution of the effluent streams.

Abstract: An arrangement for protecting the wall of a vapor generator from stresses due to thermal expansion of duct end sections and plenums associated therewith, and including support plate means which abut the plenum ends and transmit the stresses to rigid support members to be balanced by similar stresses from the opposite end of the plenum.

Abstract: A vapor pressure relief system comprising a safety valve and vent pipe movable with thermal expansion and contraction of the associated vapor generator, and a fixed exhaust pipe and drip pan, the latter having an opening to admit the vent pipe and accommodate the movement thereof, and including slidable cover plates surrounding the vent pipe and providing a closure over the drip pan opening.

Abstract: In an illustrative embodiment of the invention, a steam and water drum of a steam generating system is provided with an optical viewing device, partially inserted through the drum's manway, which permits visual inspection or observation of the drum internals. The device comprises a transparent protective barrier, or window, at the end of the device within the drum, which eliminates fogging or moisture condensation on the window to ensure visibility, a water cooled lens system having a wide angle lens for increased angular exposure, and an eye piece or camera attached to the other end of the device disposed outside the drum.

Abstract: An arrangement including at least one pair of load cells capable of continuously determining the quantity of material contained within a reservoir and wherein the reservoir support framework will normally convey the load through both cells and includes structural members which can be positioned to by-pass the load around a defective cell and permit the removal thereof without interrupting the operation of the other cell.

Abstract: A bottom supported vapor generator having tubular platens communicating with upper and lower headers and including rigid members fixedly connecting the lower headers to a grid slidably supported on concrete pedestals.

Abstract: A bottom supported vapor generator including rigid means supporting the drums and generating tube banks, and resilient means supporting the furnace tube walls and headers.