Robotic system and method for circumferential work processes and delivery of a medium

• US 20060042659A1
• Filed: 09/01/2004
• Published: 03/02/2006
• Est. Priority Date: 09/01/2004
• Status: Abandoned Application

• Current Assignee: Arizona Public Service Company (Pinnacle West Capital Corporation)
• Original Assignee: Pinnacle West Capital Corporation
• Inventors: James, Michael W., Fernandez, Edison, Manley, Curt K., Radigan, Terry M., Amie, Frank P. III, Wilfong, Troy A., Mounnarat, Stephen S., Welch, Edward R.
• Application Number:
  US10/932,180
• Publication Number:
  US 20060042659A1
• Time in Patent Office: Days
• US Class Current: 134/22.100
• CPC Class Codes: B08B 3/024 Cleaning by means of spray elements moving over the surface to be cleaned
• CPC Class Codes: B08B 9/023 Cleaning the external surface B08B9/021 takes precedence
• CPC Class Codes: G21C 17/017 Inspection or maintenance of pipe-lines or tubes in nuclear installations
• CPC Class Codes: Y02E 30/30 Nuclear fission reactors

Abstract

A system (42) for treating a columnar element (22) at a remote location (28) includes a vehicle (68) having a moveable base (98), a clamp (100) attachable to the columnar element (22), a rotating member (104), and a jack (108) having an effector (112) coupled to the rotating member (104). The jack (108) and rotating member (104) lift the effector (112) above the base (98) and rotate the effector (112) about the columnar element (22). A vehicle controller (58), remote from the vehicle (68), but in communication with the vehicle (68), controls the components of the vehicle (68). A method (186) for treating the columnar element (22) using the vehicle (68) entails navigation and positioning of the effector (112) at the region of interest (30) via the vehicle controller (58), and enabling delivery of a medium (72) from the effector (112) about a circumference of the columnar element (22).

Claims

1. A system for treating a columnar element at a remote location comprising:

a vehicle moveable along a floor of said remote location;

an effector mounted on said vehicle; and

a controller positioned remote from said vehicle, said controller being in communication with said vehicle for directing movement of said vehicle to said columnar element and for enabling said effector to act upon a circumferential surface of said columnar element.

2. A system as claimed in claim 1 wherein said vehicle further includes a clamp for clamping attachment to said columnar element.

3. A system as claimed in claim 2 wherein said vehicle further includes an actuator in communication with said clamp, said clamp includes hinged jaws, and said actuator actuates said hinged jaws to encircle said columnar element in response to direction from said controller.

4. A system as claimed in claim 1 wherein said vehicle further includes:

a base moveable along said floor; and

a jack having a first end in communication with said base and having a second end, said effector being coupled to said second end, and said jack being extendible to lift said effector above said base.

5. A system as claimed in claim 4 further comprising:

a pivot hinge coupling a front edge of said first end of said jack to said base; and

means, interposed between said jack and said base, for pivoting said jack about said pivot hinge to tilt said jack in a forward direction.

6. A system as claimed in claim 1 wherein said vehicle further includes:

a base moveable along said floor; and

a rotating member coupled between said base and said nozzle, said rotating member being configured to rotate relative to said base to enable said effector to act upon said circumferential surface of said columnar element.

7. A system as claimed in claim 1 wherein said vehicle is a tracked vehicle having endless tracks.

8. A system as claimed in claim 1 wherein said effector is a nozzle for delivering a medium to said circumferential surface of said columnar element.

9. A system as claimed in claim 8 wherein said columnar element is bottom mounted instrumentation (BMI) that penetrates a reactor pressure vessel of a nuclear reactor at a penetration region, and said nozzle is configured to deliver said medium to said penetration region of said BMI to clean said penetration region prior to a visual examination.

10. A system as claimed in claim 8 wherein said medium is a carbon dioxide cleaning medium.

11. A system as claimed in claim 8 further comprising:

a vessel positioned remote from said vehicle and containing said medium; and

a hose coupled between each of said vessel and said nozzle for delivering said medium from said vessel to said nozzle.

12. A system as claimed in claim 1 wherein said controller is configured for manipulation by an operator, and said system further comprises a camera mounted on said vehicle for providing images of said remote location to said operator.

13. A system as claimed in claim 1 further comprising:

a control cable coupled between said vehicle and said controller; and

a cable tensioner interfaced with said control cable, said cable tensioner functioning to remove an excess amount of said control cable from said remote location and to insert an additional amount of said control cable to said remote location as said vehicle moves about said remote location.

14. A system as claimed in claim 13 wherein said cable tensioner comprises:

a motor for driving said control cable in either of a first direction and a second direction; and

a drive input in communication with said motor and said controller, said controller directing said motor to drive said control cable in one of said first direction and said second direction in response to said movement of said vehicle.

15. A method for cleaning bottom mounted instrumentation (BMI) at a penetration region of a reactor pressure vessel, said method comprising:

remotely directing a vehicle to said BMI; and

remotely enabling delivery of a frozen carbon dioxide medium from a nozzle of said vehicle to said penetration region.

16. A method as claimed in claim 15 further comprising positioning said vehicle in clamping engagement with said BMI prior to delivery of said frozen carbon dioxide medium.

17. A method as claimed in claim 15 wherein said penetration region is positioned at a distance above a floor underneath said pressure reactor vessel, said vehicle is moveable along said floor, and said method further comprises adjusting a height of said nozzle to reach said penetration region.

18. A method as claimed in claim 15 further comprising rotating said nozzle about said BMI to clean a circumferential surface of said BMI at said penetration region.

19. A method as claimed in claim 15 further comprising periodically repeating said enabling operation separated by intervals of non-delivery of said frozen carbon dioxide medium.

20. A method for treating a columnar element at a remote location using a remote controlled vehicle, said vehicle including a moveable base, a clamp mounted on said base, a jack in communication with said base, and an effector coupled to an end of said jack, said method comprising:

directing movement of said vehicle to said columnar element;

actuating hinged jaws of said clamp to encircle said columnar element;

extending said jack to lift said effector above said base; and

enabling said effector to act upon a surface of said columnar element.

21. A method as claimed in claim 20 wherein said vehicle includes a rotating member coupled to said base and configured to rotate relative to said base, said effector being coupled to said rotating member, and said method further comprises adjusting a position of said effector via said rotating member to enable said effector to act upon a circumference of said columnar element.

22. A method as claimed in claim 20 wherein said vehicle includes a camera, and said method further comprises providing images of said surface via said camera following said delivering operation.

23. A system for cleaning a columnar element at a remote location comprising:

a vehicle including;

a base moveable along a floor of said remote location;

a clamp mounted on said base for clamping attachment to said columnar element;

a rotating member coupled between said base and configured to rotate relative to said base about said columnar element; and

an effector in communication with said rotating member so that rotation of said rotating member causes rotation of said effector; and

a controller positioned remote from said vehicle, said controller being in communication with said vehicle for directing movement of said effector to said columnar element and for enabling said effector to deliver a cleaning medium to a circumferential surface of said columnar element.

24. A system as claimed in claim 23 wherein said vehicle further includes a jack having a first end in communication with said base and having a second end, said effector being coupled to said second end, and said jack being extendible to lift said effector above said base.

25. A system as claimed in claim 24 wherein said vehicle further includes:

a pivot hinge coupling a front edge of said first end of said jack to said base; and

means, interposed between said jack and said base for pivoting said jack about said pivot hinge to tilt said jack in a forward direction.

26. A system for remote cleaning of a penetration region of bottom mounted instrumentation (BMI) that penetrates a reactor pressure vessel of a nuclear reactor comprising:

a vehicle including;

a base moveable along a floor of said remote location;

a rotating member coupled to said base;

a jack having a first end in communication with said rotating member and having a second end; and

a nozzle coupled to said second end of said jack, said jack being extendible to lift said nozzle above said base and said rotating member being configured to rotate relative to said base about said BMI to enable said nozzle to deliver said cleaning medium about a circumference of said penetration region; and

a controller positioned remote from said vehicle, said controller being in communication with said vehicle for directing movement of said nozzle to said penetration region and for enabling said nozzle to deliver said cleaning medium to said circumference of said penetration region.