Canadian Patents Database / Patent 2766572 Summary

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(12) Patent: (11) CA 2766572
(54) English Title: HEAVY WORKTABLE AND METHOD FOR NUCLEAR REACTOR RETUBE
(54) French Title: TABLE DE MANIPULATION LOURDE POUR LE REMPLACEMENT DES TUBES D'UN REACTEUR NUCLEAIRE
(51) International Patent Classification (IPC):
  • G21C 17/017 (2006.01)
  • G21C 21/00 (2006.01)
(72) Inventors (Country):
  • MORIKAWA, DAVID (Canada)
  • JACOBS, CHRIS THEODORE CHARLES (Canada)
  • CRUZ, GERMAN (Canada)
(73) Owners (Country):
  • ATOMIC ENERGY OF CANADA LIMITED (Canada)
(71) Applicants (Country):
  • ATOMIC ENERGY OF CANADA LIMITED (Canada)
(74) Agent: NORTON ROSE FULBRIGHT CANADA LLP/S.E.N.C.R.L., S.R.L.
(45) Issued: 2018-01-02
(22) Filed Date: 2012-01-16
(41) Open to Public Inspection: 2012-07-14
Examination requested: 2016-10-20
(30) Availability of licence: N/A
(30) Language of filing: English

(30) Application Priority Data:
Application No. Country Date
61/432,964 United States of America 2011-01-14

English Abstract

A worktable for supporting a tool for a nuclear reactor retubing operation. The worktable is positionable adjacent to an end-face of a nuclear reactor core and movable in a direction parallel to the end-face. The worktable includes a frame, a top member supported by the frame and having a surface for supporting a tool for the nuclear reactor retubing operation, a drive unit for moving the top member in the direction parallel to the end-face of the nuclear reactor core to position the tool adjacent to the end-face at a desired location, and a controller operably connected to the drive unit for controlling movement of the top member in the direction parallel to the end-face of the nuclear reactor core.


French Abstract

Une table de travail lourde est destinée à soutenir un outil dopération de retubage de réacteur nucléaire. La table de travail peut être positionnée adjacente à une face dextrémité dun cur de réacteur nucléaire et déplacée dans une direction parallèle à la face dextrémité. La table de travail comprend un cadre, un élément de dessus supporté par le cadre et comportant une surface de soutien doutil dopération de retubage de réacteur nucléaire, un module dentraînement destiné à déplacer lélément de dessus dans la direction parallèle à la face dextrémité du cur de réacteur nucléaire pour positionner loutil adjacent à la face dextrémité à un emplacement désiré, et un contrôleur connecté de manière fonctionnelle au module dentraînement en vue de contrôler le mouvement de lélément de dessus dans la direction parallèle à la face dextrémité du cur de réacteur nucléaire.


Note: Claims are shown in the official language in which they were submitted.


What is claimed is:

1. A worktable for supporting a tool for a nuclear reactor retubing
operation, the
worktable positionable adjacent to an end-face of a nuclear reactor core and
movable in a
direction parallel to the end-face, the worktable comprising:
a frame;
a top member supported by the frame and having a surface for supporting a tool

for the nuclear reactor retubing operation;
a drive unit for moving the top member in the direction parallel to the end-
face of
the nuclear reactor core to position the tool adjacent to the end-face at a
desired location;
and
a controller operably connected to the drive unit for controlling movement of
the
top member in the direction parallel to the end-face of the nuclear reactor
core.
2. The worktable of claim 1, wherein the top member includes a bolt pattern
for
coupling the tool to the worktable.
3. The worktable of claim 1, wherein the top member includes keyways
machined
into the top member.
4. The worktable of claim 1, further comprising rails mounted to the top
member for
providing z-axis movement of the tool towards and away from the end-face of
the nuclear
reactor core.
5. The worktable of claim 1, further comprising an extension coupled to a
front end
of the worktable adjacent to the reactor core and including a top surface,
wherein the top
surface is flush with the top member of the worktable such that the extension
extends the
top member of the worktable in a z-axis direction towards the nuclear reactor
core.
6. The worktable of claim 1, wherein the controller is a local control
pendant for
moving the worktable relative to the face of the nuclear reactor core.

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7. The worktable of claim 1, wherein the controller is a remote retube
control center
operable to control the movement of the top member remotely.
8. The worktable of claim 1, further comprising a vision system for
detecting a
position of the worktable relative to the end-face of the nuclear reactor
core.
9. The worktable of claim 8, wherein the vision system includes a camera.
10. The worktable of claim 1, wherein the drive unit is an x-drive unit for
moving the
top member horizontally in the x-direction parallel to the end-face of the
nuclear reactor
core to position the tool adjacent to the end-face.
11. The worktable of claim 10, wherein the x-drive includes one of a rack
and a
pinion coupled to the frame.
12. The worktable of claim 10, further comprising a y-drive unit for
raising the top
member vertically in a y-direction parallel to the end-face of the nuclear
reactor core to
position the tool adjacent to the end-face.
13. The worktable of claim 12, wherein the y-drive unit includes a screw
and worm
drive for raising the top member.
14. The worktable of claim 10, wherein the x-drive unit provides coarse
positioning
in the x-direction and the y-drive unit provides fine positioning in the y-
direction.

12


15. A worktable for supporting a tool for a nuclear reactor retubing
operation, the
worktable positionable adjacent to an end-face of a nuclear reactor core and
movable
horizontally in an x-direction and vertically in a y-direction parallel to the
end-face, the
worktable comprising:
a frame;
a top member supported by the frame and having a surface for supporting a tool

for the nuclear reactor retubing operation;
an x-drive unit for moving the top member horizontally in the x-direction
parallel
to the end-face of the nuclear reactor core to position the tool adjacent to
the end-face;
a y-drive unit for moving the top member vertically in the y-direction
parallel to
the end-face of the nuclear reactor core to position the tool adjacent to the
end-face; and
a controller operably connected to the x-drive unit and the y-drive unit for
controlling movement of the top member in the x-direction and the y-direction,
wherein
the controller is programmed to control movement of the top member in the x-
direction
independently from the y-direction.
16. The worktable of claim 15, wherein the x-drive unit provides coarse and
fine
positioning in the x-direction and the y-drive unit provides fine positioning
in the y-
direction.
17. The worktable of claim 15, wherein the x-drive includes a rack and a
pinion
coupled to the frame.
18. The worktable of claim 15, wherein the y-drive unit includes a screw
and worm
drive for raising the top member.
19. The worktable of claim 15, further comprising a vision system for
detecting a
position of the worktable relative to the end-face of the nuclear reactor
core.

13


20. A method of retubing a nuclear reactor, the method comprising:
providing a worktable adjacent to an end-face of a nuclear reactor core,
wherein
the worktable includes a surface for supporting a tool for the nuclear reactor
retubing
operation and a drive unit for positioning the worktable relative to the end-
face of the
nuclear reactor core;
supporting the tool for the nuclear reactor retubing operation on the
worktable;
positioning the worktable relative to the end-face of the nuclear reactor core
by
controlling the drive unit; and
retubing the nuclear reactor using the worktable to locate the tool relative
to the
end-face of the nuclear reactor core.
21. The method of claim 20, wherein the drive unit includes an x-drive unit
and a y-
drive unit, wherein the step of positioning the worktable relative to the end-
face of the
nuclear reactor core further comprises:
coarsely controlling the position of the worktable relative to the end-face in
a
horizontal x-direction substantially parallel to the end-face using the x-
drive; and
finely controlling the position of the worktable relative to the end-face in a

vertical y-direction substantially parallel to the end-face using the y-drive.
22. The method of claim 20, further comprising extending the worktable in a
z-
direction towards the end-face of the nuclear reactor by attaching an
extension to a front
of the worktable.
23. The method of claim 20, further comprising moving the tool towards the
end-face
of the nuclear reactor core along a rail provided on the worktable.
24. The method of claim 20, wherein controlling the drive unit further
comprises
remotely controlling the drive unit from a remote retube control center.
25. The method of claim 20, wherein controlling the drive unit further
comprises
controlling the drive unit from a local control pendant.

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A single figure which represents the drawing illustrating the invention.

For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Administrative Status , Maintenance Fee  and Payment History  should be consulted.

Admin Status

Title Date
(22) Filed 2012-01-16
(41) Open to Public Inspection 2012-07-14
Examination Requested 2016-10-20
(45) Issued 2018-01-02

Maintenance Fee

Description Date Amount
Last Payment 2017-12-15 $200.00
Next Payment if small entity fee 2019-01-16 $100.00
Next Payment if standard fee 2019-01-16 $200.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

  • the reinstatement fee set out in Item 7 of Schedule II of the Patent Rules;
  • the late payment fee set out in Item 22.1 of Schedule II of the Patent Rules; or
  • the additional fee for late payment set out in Items 31 and 32 of Schedule II of the Patent Rules.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Filing $400.00 2012-01-16
Maintenance Fee - Application - New Act 2 2014-01-16 $100.00 2014-01-03
Maintenance Fee - Application - New Act 3 2015-01-16 $100.00 2015-01-13
Maintenance Fee - Application - New Act 4 2016-01-18 $100.00 2016-01-04
Request for Examination $800.00 2016-10-20
Maintenance Fee - Application - New Act 5 2017-01-16 $200.00 2017-01-04
Final $300.00 2017-11-09
Maintenance Fee - Application - New Act 6 2018-01-16 $200.00 2017-12-15

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Abstract 2012-01-16 1 18
Description 2012-01-16 10 525
Drawings 2012-01-16 9 398
Claims 2012-01-16 4 147
Representative Drawing 2012-03-13 1 33
Cover Page 2012-07-10 1 64
Prosecution-Amendment 2016-10-20 1 53
Prosecution-Amendment 2016-10-24 1 30
Prosecution-Amendment 2016-12-08 5 244
Prosecution-Amendment 2017-03-02 17 897
Drawings 2017-03-02 9 402
Claims 2017-03-02 4 140
Description 2017-03-02 10 521
Correspondence 2017-11-09 2 69
Representative Drawing 2017-12-04 1 23
Cover Page 2017-12-04 1 56