Canadian Patents Database / Patent 2766470 Summary

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(12) Patent: (11) CA 2766470
(54) English Title: NUCLEAR REACTOR FEEDER REMOVAL PROCESS
(54) French Title: PROCEDE DE DEPOSE DES CONDUITES D'ALIMENTATION
(51) International Patent Classification (IPC):
  • G21C 21/00 (2006.01)
(72) Inventors (Country):
  • KORELL, NORMAN DAVID WILSON (Canada)
  • MAGDA, BRIAN ROY (Canada)
  • KOSAKOWSKI, MARIUSZ (Canada)
  • LAPAGE, PIERRE JEAN PAUL (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: 2017-08-15
(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
61/433,058 United States of America 2011-01-14

English Abstract

A method of removing feeders from a nuclear reactor includes removing at least a portion of a feeder cabinet that can include a feeder cabinet wall and a feeder cabinet soffit, followed by disconnection and removal of feeders used to supply and remove coolant from fuel channel assemblies of the reactor.


French Abstract

Un procédé de retrait de conduites dalimentation dun réacteur nucléaire comprend le retrait dau moins une partie dune armoire dalimentation qui peut comprendre une armoire dalimentation et une tôle ondulée de larmoire dalimentation, suivi par une déconnexion et le retrait des conduites dalimentation utilisées pour alimenter et retirer lagent de refroidissement des ensembles de canaux de combustible du réacteur.


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

CLAIMS
1. A method of removing feeders from a nuclear reactor plant, the method
comprising:
suspending a feeder platform before a face of a nuclear reactor of the nuclear
reactor
plant at a first height;
removing at least a portion of a soffit of a first feeder cabinet using the
feeder platform;
raising the feeder platform to a second height above the first height;
installing a retubing platform (RTP) before the face of the nuclear reactor
and below the
feeder platform after removal of the portion of the soffit, wherein the RTP is
movable to
different positions before the face of the nuclear reactor, independent of the
movement of the
feeder platform;
disconnecting a feeder coupling;
cutting a feeder; and
removing the feeder.
2. The method of claim 1, wherein the act of suspending the feeder platform
includes
suspending the feeder platform beneath the soffit from overhead supports
3. The method of claim 2, wherein the feeder platform is a front feeder
platform the method
further comprising
suspending a rear feeder platform beneath the soffit;
removing at least an additional portion of the soffit from the rear feeder
platform; and
raising the rear feeder platform prior to installation of the RTP.
4. The method of claim 1, wherein the act of removing the feeder includes
removing a lower
feeder using a combination of the feeder platform and the RTP.
5. The method of claim 3 further comprising securing the front and rear
feeder platforms
together, wherein the feeder that is cut and removed is an upper feeder that
is removed from the
secured front and rear feeder platforms.
13

6. The method of claim 1, further comprising removing cantilever supports.
7. A method of removing feeders from a nuclear reactor plant, the method
comprising:
installing a first platform movable to different elevations across a face of
the reactor
plant;
adjustably suspending the first platform to the different elevations across
the face of the
reactor plant;
installing a second platform also movable to different elevations across the
face of the
reactor plant and independently of the first platform;
installing a third platform also movable to different elevations across the
face of the
reactor plant and independently of the first and second platforms; and
supporting the third platform upon at least two columns fixed to a floor of
the nuclear
reactor plant,
cutting and removing a feeder using the first platform along with either the
second
platform or the third platform.
8. The method of claim 7, further comprising removing a first feeder
cabinet wall.
9. The method of claim 8, wherein the act of removing the first feeder
cabinet wall is at
least partially performed from a scissor lift.
10. The method of claim 7, further comprising removing a first feeder
cabinet soffit using the
first platform.
11. The method of claim 10, further comprising removing a second feeder
cabinet soffit
using the second platform.
12. The method of claim 7, wherein the act of removing the feeder includes
removing an
upper feeder and a lower feeder.
14

13. The method of
claim 7, further comprising installing a monorail adjacent headers of the
nuclear reactor.


A single figure which represents the drawing illustrating the invention.

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Admin Status

Title Date
(22) Filed 2012-01-16
(41) Open to Public Inspection 2012-07-14
Examination Requested 2016-10-20
(45) Issued 2017-08-15

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 2017-07-04
Maintenance Fee - Patent - New Act 6 2018-01-16 $200.00 2017-12-15

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Document
Description
Date
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Number of pages Size of Image (KB)
Abstract 2012-01-16 1 10
Description 2012-01-16 12 673
Claims 2012-01-16 4 80
Drawings 2012-01-16 10 703
Representative Drawing 2012-03-13 1 12
Cover Page 2012-07-10 1 38
Prosecution-Amendment 2016-11-16 1 27
Prosecution-Amendment 2016-10-20 1 51
Prosecution-Amendment 2016-11-28 5 295
Prosecution-Amendment 2017-02-23 23 789
Drawings 2017-02-23 10 617
Claims 2017-02-23 3 63
Description 2017-02-23 12 578
Correspondence 2017-07-04 1 37
Representative Drawing 2017-07-13 1 11
Cover Page 2017-07-13 1 37