Method for removing and installing a control rod drive
Patent
·
OSTI ID:5079316
This patent describes a method for removing an installing an elongated control rod drive from a drive housing mounted in the vessel of a boiling water reactor of the type having an undervessel cavity with a pair of elongated service rails by means of a control rod drive installation and removal assembly. It comprises: a carriage means and an elongated cradle means pivotally connected to the carriage means, wherein the carriage means includes a plurality of pair of carriage wheels that rollingly engage the service rails, and a remotely operable drive train coupled to at least one of the carriage wheels for remotely moving the carriage means along the service rails, and wherein the cradle means has a lifting and lowering means that includes both a leadscrew drive assembly and a hydraulic cylinder and piston means for moving a control rod drive between a position where its length subsumes the length of the cradle means, and a position where it is installed within the drive housing.
- Assignee:
- Westinghouse Electric Corp., Pittsburgh, PA (USA)
- Patent Number(s):
- A; US 5019325
- Application Number:
- PPN: US 7-512249
- OSTI ID:
- 5079316
- Country of Publication:
- United States
- Language:
- English
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