Integral forged shroud flange for a boiling water reactor
AssigneeGeneral Electric Company
InventorsJack T. Matsumoto, Alex B. Fife
Life of this patent
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Abstract
A forged upper shroud section which may be machined from a single piece rectangular cross-section ring forging and includes a circular flange and a cylindrical shell is described. Openings and slots are machined into the flange to align and support the shroud head. A groove is machined along an inside surface of the cylinder section, and the groove may be used to support top guide grid (not shown). An end of the cylinder section is machined with a weld prep for attachment to the core section of the shroud.
Claims14
A forged upper shroud section for a shroud of a boiling water nuclear reactor, the shroud comprising at least one cylindrical section, said upper shroud section comprising:
- a cylindrical shell;
- a circular shaped flange at one end of said shell, said flange and said cylindrical shell machined from one forging as one piece;
- at least one of a plurality of openings and a plurality of slots in said flange;
- and
- a circumferential groove machined into and extending substantially completely around an inside surface of said cylindrical shell.
A shroud for a boiling water nuclear reactor, said shroud comprising:
- at least one cylindrical section;
- a forged upper shroud section comprising a cylindrical shell and a circular shaped flange at a first end of said shell, said flange and said cylindrical shell machined from one forging as one piece, a second end of said cylindrical shell welded to one of said at least one cylindrical section;
- at least one of a plurality of openings and a plurality of slots in said flange;
- and
- a circumferential groove machined into and extending substantially completely around an inside surface of said cylindrical shell.
A method for fabricating an upper shroud section for a shroud of a boiling water nuclear reactor, the shroud comprising at least one cylindrical section, said method comprising the steps of:
- machining a flange in a single piece rectangular cross-section ring forging;
- machining a cylindrical shell in the forging;
- machining at least one of a plurality of openings and a plurality of slots in the flange;
- and
- machining a circumferential groove into and extending substantially completely around an inside surface of the cylindrical shell.
Dependencies are inferred from the claim text.