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  • [发明专利]JP19870289236 _ SIEMENS AG 1987年11月16日
    For the purpose of lengthening its permissible residence time, a fuel element in the reactor core of a pressurised-water reactor has a nuclear fuel column, the enrichment of which with fissionable atomic nuclei as averaged over half at the outlet of t...
  • 2.
    [发明专利]JP20070269751 _ 2007年10月17日
    A jet pump diffuser weld repair device includes a lower ring section and an upper ring section respectively sized to fit around a circumference of the diffuser on opposite sides of the weld to be repaired. The lower and upper ring sections are provide...
  • 3.
    [发明专利]JP20000530914 _ 1999年01月19日
    In order, in a pressure accumulator, to generate a required operating pressure of a fluid situated in the pressure accumulator, a heater device is provided, disposed in an upper region of the pressure accumulator. The device generates a vapor cushion ...
  • 4.
    [发明专利]JP19970532237 _ 1997年02月28日
    A core barrel for a reactor pressure vessel of a nuclear reactor plant has a carrying structure that is supported on an inner surface of the shroud of the barrel. The carrying structure receives a tension rod that extends parallel to the longitudinal ...
  • 5.
    [发明专利]JP19950257796 _ 1995年10月04日
    The thermal valve (25) consists of a vessel (26) surrounding a heat exchanger (22) immersed in a pond (11) contg. fluid. The vessel (26) has at least one opening at the top and fluid can enter at the bottom. The opening can be partially or fully opene...
  • 6.
    [发明专利]JP19940507385 _ 1994年08月18日
    PCT No. PCT/FR94/01013 Sec. 371 Date Jul. 22, 1996 Sec. 102(e) Date Jul. 22, 1996 PCT Filed Aug. 18, 1994 PCT Pub. No. WO95/06318 PCT Pub. Date Mar. 2, 1995The installation includes at least one loading line comprising a framework support, a magazine ...
  • [发明专利]JP19800083757 _ HITACHI LTD 1980年06月19日
    A method of repairing the housing of a control rod driving system of a nuclear reactor, the housing being inserted through the wall of a pressure vessel of the reactor into a cylindrical sleeve secured to the inner surface of the vessel, which housing...
  • [发明专利]JP19810201730 _ WESTINGHOUSE ELECTRIC CORP 1981年12月16日
    A mechanical spectral shift reactor comprises a reactive core (34) having fuel assemblies (32) accommodating both water displacer elements (40) and neutron absorbing control rods for selectively changing the volume of water-moderator in the core (34)....
  • [发明专利]JP19870144213 _ WESTINGHOUSE ELECTRIC CORP 1987年06月11日
    The invention relates to a nuclear fuel assembly having a plurality of fuel-rod spacer grids (16) with detents (46,48) designed to apply to each fuel rod (18) a predetermined force laterally supporting it against displacement and vibration. The predet...
  • [发明专利]JP19840267629 _ WESTINGHOUSE ELECTRIC CORP 1984年12月20日
    Elongated tubular elements containing burnable absorber material are clustered in an array to provide a burnable absorber assembly for insertion within one or more guide thimbles of a fuel assembly for controlling reactivity. The burnable absorber ass...
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