Method and device for reducing cationic impurities and for dosing lithium in the cooling water of a light water reactor, and a cooling-water system of a light water reactor having such a device
AssigneesFramatome ANP GmbH, ENBW Kraftwerke AG
InventorsManfred Meintker, Michael Bolz, Günther Enkler, Wilfried Rühle
Life of this patent
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Abstract
For dosing lithium in cooling water containing cationic impurities or for reducing cationic impurities, the invention guides cooling water cycle through a first side of an electrodialysis unit and guides a concentration cycle through a second side of the electrodialysis unit. Cationic impurities are filtered out of the medium of the concentration cycle with a selective ion exchanger that is disposed in the concentration cycle.
Claims50
A method for reducing cationic impurities in a cooling water, which comprises:
- providing a light water reactor having:
- a cooling-water loop containing a cationic solution;
- a concentrate loop containing a medium in which a heightened cation concentration is produced;
- and
- a selective ion exchanger disposed in the concentrate loop;
- guiding cooling water of the cooling-water loop through a first side of an electrodialysis unit;
- guiding the medium of the concentrate loop through a second side of the electrodialysis unit;
- and
- filtering out cationic impurities from the medium in the selective ion exchanger.
A method for dosing lithium in cooling water, which comprises:
- providing a light water reactor having:
- a cooling-water loop containing a cooling water with cationic impurities;
- a concentrate loop containing a medium having a heightened cation concentration;
- and
- a selective ion exchanger disposed in the concentrate loop;
- guiding the cooling water of the cooling-water loop through a first side of an electrodialysis unit;
- guiding the medium of the concentrate loop through a second side of the electrodialysis unit;
- applying an electric voltage in the electrodialysis unit to control an exchange of lithium cations between the cooling water in the cooling-water loop and the medium in the concentrate loop;
- and
- filtering out cationic impurities from the medium in the selective ion exchanger.
A method for dosing lithium in cooling water, which comprises:
- reducing cationic impurities in cooling water by:
- providing a light water reactor having:
- a cooling-water loop containing a cooling water with cationic impurities;
- a concentrate loop containing a medium having a heightened cation concentration;
- and
- a selective ion exchanger disposed in the concentrate loop;
- guiding the cooling water of the cooling-water loop through a first side of an electrodialysis unit;
- guiding the medium of the concentrate loop through a second side of the electrodialysis unit;
- applying an electric voltage in the electrodialysis unit to control an exchange of lithium cations between the cooling water in the cooling-water loop and the medium in the concentrate loop;
- and
- filtering out cationic impurities from the medium in the selective ion exchanger.
A method for reducing cationic impurities in a cooling water, which comprises:
- dosing lithium in cooling water by:
- providing a light water reactor having:
- a cooling-water loop containing a cationic solution;
- a concentrate loop containing a medium in which a heightened cation concentration is produced;
- and
- a selective ion exchanger disposed in the concentrate loop;
- guiding cooling water of the cooling-water loop through a first side of an electrodialysis unit;
- guiding the medium of the concentrate loop through a second side of the electrodialysis unit;
- and
- filtering out cationic impurities from the medium in the selective ion exchanger.
In a light water reactor having a cooling-water loop containing a cooling water with cationic impurities and a concentrate loop containing a medium having a heightened cation concentration, a device for at least one of reducing cationic impurities and dosing lithium in the cooling water, the device comprising:
- an electrodialysis unit having two sides, one of said sides connected to the cooling-water loop and another of said sides connected to the concentrate loop;
- and
- a selective ion exchanger disposed in the concentrate loop for at least one of reducing cationic impurities and dosing lithium in the cooling water.
A light water reactor, comprising:
- a cooling-water loop containing a cooling water with cationic impurities;
- a concentrate loop containing a medium having a heightened cation concentration;
- an electrodialysis unit having two sides, one of said sides connected to said cooling-water loop and another of said sides connected to said concentrate loop;
- and
- a selective ion exchanger disposed in said concentrate loop for at least one of reducing cationic impurities and dosing lithium in said cooling water.
A cooling-water system of a light water reactor, comprising:
- at least one of:
- a cooling-water cleanup plant;
- a cooling-water storage device;
- and
- a cooling-water evaporator plant;
- a device for at least one of reducing cationic impurities and dosing lithium in cooling water, said device having:
- a cooling-water loop containing the cooling water with cationic impurities, said cooling-water loop connected to at least one of said cooling-water cleanup plant, said cooling-water storage device, and said cooling-water evaporator plant;
- a concentrate loop containing a medium having a heightened cation concentration;
- an electrodialysis unit having two sides, one of said sides connected to said cooling-water loop and another of said sides connected to said concentrate loop;
- and
- a selective ion exchanger disposed in said concentrate loop.
Dependencies are inferred from the claim text.