Method for reducing corrosion erosion in the feeder pipes used in the primary loop of a candu-type nuclear power plant
CA 2393461 C · Owner: Framatome Anp Gmbh · Inventors: Kraemer, Georg; Streit, Klaus; Ammann, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for reducing corrosion erosion in the feeder pipes (12a b) used in the primary loop of a CANDU* type nuclear power plant. According to the present invention to this end the surface roughness of the primary side inside walls of the heat exchanger tubes (22) of a steam generator (20) that is arranged in the primary loop which is caused by operation of the nuclear power plant is reduced by treatment with an abrasive. *CANDU is a registered trade-mark of Atomic Energy of Canada Limited.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 15, 2002 and granted December 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.