Jet pump beam bolt retainer cutter
First Claim
1. A cutting apparatus for mounting onto a jet pump assembly in a nuclear reactor system including a transition piece and an inlet mixer, said transition piece effective for receiving water from an inlet riser and for routing at least a portion of said water to a single inlet mixer of said jet pump assembly, said inlet mixer being effective for engaging a jet pump beam including trunions and a beam bolt defining a laterally flanged lower circumference effective for securing said inlet mixer, said transition piece including arms joined at their upper ends by beam means for joining said arms and defining notches for engaging in holding action with the ends of said jet pump beam, said inlet mixer defining a surface against which the beam bolt is bearable near its lower circumference and including vertical sides straddlingly adjacent said surface, said inlet mixer being coupled together at initial assembly with a retaining piece including vertical and horizontal portions, one of said vertical portions being fixedly mounted on one of said vertical sides and including other arms for holding engagement with said beam bolt, said cutting apparatus being seatable on said inlet mixer and transition piece with said jet pump beam rotated 90 degrees out of normal installed position to permit cutting operation, said cutting apparatus comprising a baseplate including mounting extensions for respectively being supported upon said inlet mixer and by the arms of said transition piece, further comprising a first latch means mounted on said baseplate for securing said cutting apparatus onto said jet pump beam and said retaining piece, and horizontal means for horizontally translating on said baseplate, said horizontal means including cutting means for cutting including wheel means for cutting through said retaining piece along a horizontal line, and vertical means for positioning said cutting means vertically at said horizontal line, said horizontal means being effective for horizontally translating said wheel means along said horizontal line for cutting through said retaining piece, whereby the portion of said retaining piece being fixedly mounted onto said transition piece is separated from the remainder thereof.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus for underwater separation of a jet pump beam from the inlet mixer of a jet pump in a nuclear reactor system. The apparatus underwater cuts a retaining piece coupling the beam with the inlet mixer.
44 Citations
26 Claims
- 1. A cutting apparatus for mounting onto a jet pump assembly in a nuclear reactor system including a transition piece and an inlet mixer, said transition piece effective for receiving water from an inlet riser and for routing at least a portion of said water to a single inlet mixer of said jet pump assembly, said inlet mixer being effective for engaging a jet pump beam including trunions and a beam bolt defining a laterally flanged lower circumference effective for securing said inlet mixer, said transition piece including arms joined at their upper ends by beam means for joining said arms and defining notches for engaging in holding action with the ends of said jet pump beam, said inlet mixer defining a surface against which the beam bolt is bearable near its lower circumference and including vertical sides straddlingly adjacent said surface, said inlet mixer being coupled together at initial assembly with a retaining piece including vertical and horizontal portions, one of said vertical portions being fixedly mounted on one of said vertical sides and including other arms for holding engagement with said beam bolt, said cutting apparatus being seatable on said inlet mixer and transition piece with said jet pump beam rotated 90 degrees out of normal installed position to permit cutting operation, said cutting apparatus comprising a baseplate including mounting extensions for respectively being supported upon said inlet mixer and by the arms of said transition piece, further comprising a first latch means mounted on said baseplate for securing said cutting apparatus onto said jet pump beam and said retaining piece, and horizontal means for horizontally translating on said baseplate, said horizontal means including cutting means for cutting including wheel means for cutting through said retaining piece along a horizontal line, and vertical means for positioning said cutting means vertically at said horizontal line, said horizontal means being effective for horizontally translating said wheel means along said horizontal line for cutting through said retaining piece, whereby the portion of said retaining piece being fixedly mounted onto said transition piece is separated from the remainder thereof.
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7. A remotely position-settable and controllable cutting apparatus for mounting a piping arrangement for cutting off a severable portion thereof, said cutting apparatus comprising a seatable structure including a latching portion to latch onto the severable portion of the piping arrangement, whereby said severable portion is secured after cutting by said seatable structure, further comprising a horizontally movable cutting portion slideably mounted on said seatable structure, said cutting portion including an air-driven motor for turning a shaft which has mounted at its end a rotating blade effective for severing said severable portion of said arrangement said cutting portion being remotely vertically position-settable, and said seatable portion being remotely couplable to the severable portion of said structure.
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8. For use in an assembly of mechanical parts including a reference structure, a downwardly securable structure for being secured with respect to said reference structure and defining a horizontal bearing surface, an end-mountable beam for being held in said reference structure and defining a vertical threaded hole and including a downwardly threadable member for threading through said vertical threaded hole, said threadable member defining a lower bearing surface engageable with said horizontal bearing surface and having a circumferential flange adjacent said lower bearing surface, and a retaining means for holding said end-mountable beam in engagement with said downwardly securable structure, said retaining means including a mounted portion for being mounted on said downwardly securable structure, a retaining portion for engaging said end-mountable beam in holding action, and a vertical portion being disposed between said mounted and retaining portions;
- a remotely controllable tool for cutting said retaining means at said vertical portion and thereby permitting said end-mountable beam to be taken out of engagement with said downwardly securable structure, said tool comprising;
base means including mounting means for seating with respect to said reference and said downwardly securable structures, a cutting means for severing said retaining portion from said mounted portion, a horizontally movable means mounted on said base means for supporting said cutting means, first latch means mounted on said base means for coupling engagement with said retaining portion, whereby said retaining portion is secured for cutting. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
- a remotely controllable tool for cutting said retaining means at said vertical portion and thereby permitting said end-mountable beam to be taken out of engagement with said downwardly securable structure, said tool comprising;
Specification