Jet pump slip joint labyrinth seal method
AssigneeGeneral Electric Company
InventorsJohn Geddes Erbes, Martin Rudy Torres
Life of this patent
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Abstract
Methods for cutting a labyrinth seal in a nuclear reactor jet pump assembly are described. In one embodiment, the method includes removing an irradiated jet pump inlet mixer from the jet pump assembly, positioning the jet pump inlet mixer underwater, and cutting at least one circumferential groove in an inlet mixer outside surface.
Claims37
A method for cutting a labyrinth seal in a nuclear reactor jet pump assembly, the jet pump assembly comprising an inlet mixer and a diffuser joined by a slip joint, said method comprising:
- removing the jet pump inlet mixer from the jet pump assembly;
- positioning the jet pump inlet mixer underwater;
- cutting at least one new circumferential groove into an outside surface of the inlet mixer, at a location corresponding to the slip joint, with at least one of an abrasive water jet cutting nozzle, an electrical discharge machining system, and an abrasive disk system;
- and
- collecting cutting debris by suctioning water containing the cutting debris into a debris collection system.
A method for cutting a labyrinth seal in a nuclear reactor jet pump assembly, said method comprising:
- removing an irradiated jet pump inlet mixer from the jet pump assembly;
- positioning at least a portion of a cutting system in a jet pump diffuser;
- and
- cutting at least one circumferential groove in a jet pump diffuser inner surface.
A method for cutting a labyrinth seal in a nuclear reactor jet pump assembly, the jet pump assembly comprising an inlet mixer and a diffuser joined by a slip joint, said method comprising:
- removing the jet pump inlet mixer from the jet pump assembly;
- cutting at least one new circumferential groove into at least one of an outer surface of the inlet mixer and an inner surface of the diffuser, at a location corresponding to the slip joint, with at least one of an abrasive water jet cutting nozzle, an electrical discharge machining system, and an abrasive disk system;
- and
- collecting cutting debris by suctioning water containing the cutting debris into a debris collection system.
Dependencies are inferred from the claim text.