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):||
|(72) Inventors (Country):||
|(73) Owners (Country):||
|(71) Applicants (Country):||
|(74) Agent:||NORTON ROSE FULBRIGHT CANADA LLP/S.E.N.C.R.L., S.R.L.|
|(22) Filed Date:||2012-01-16|
|(41) Open to Public Inspection:||2012-07-14|
|(30) Availability of licence:||N/A|
|(30) Language of filing:||English|
|(30) Application Priority Data:|
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.
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.
1. A method of removing feeders from a nuclear reactor plant, the method
suspending a feeder platform before a face of a nuclear reactor of the nuclear
plant at a first height;
removing at least a portion of a soffit of a first feeder cabinet using the
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
different positions before the face of the nuclear reactor, independent of the
movement of the
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
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
suspending a rear feeder platform beneath the soffit;
removing at least an additional portion of the soffit from the rear feeder
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
together, wherein the feeder that is cut and removed is an upper feeder that
is removed from the
secured front and rear feeder platforms.
6. The method of claim 1, further comprising removing cantilever supports.
7. A method of removing feeders from a nuclear reactor plant, the method
installing a first platform movable to different elevations across a face of
adjustably suspending the first platform to the different elevations across
the face of the
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
cutting and removing a feeder using the first platform along with either the
platform or the third platform.
8. The method of claim 7, further comprising removing a first feeder
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
11. The method of claim 10, further comprising removing a second feeder
using the second platform.
12. The method of claim 7, wherein the act of removing the feeder includes
upper feeder and a lower feeder.
13. The method of
claim 7, further comprising installing a monorail adjacent headers of the
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|(41) Open to Public Inspection||2012-07-14|
|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
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|Fee Type||Anniversary Year||Due Date||Amount Paid||Paid Date|
|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|
|Maintenance Fee - Patent - New Act||6||2018-01-16||$200.00||2017-12-15|