Demineralizer of primary coolant system in pressurized-water reactor power plant and method for purifying primary cooling water in pressurized-water reactor power plant

摘要

By using a boric acid-resistant anion exchange resin as the anion exchange resin used in a demineralizer that purifies the primary cooling water in a pressurized-water reactor power plant, even when a boric acid-containing primary cooling water is brought into contact with the anion exchange resin disposed in the demineralizer, the generation of breaking or cracking in the anion exchange resin can be prevented.

主权项

1. A primary coolant system of a pressurized-water reactor power plant, comprising a demineralizer, which purifies primary cooling water of said pressurized-water reactor power plant, and at least one system of a chemical and volume control system, a boric acid recovery system and a spent fuel pit water puritying-coolant system,
wherein the demineralizer is installed in a demineralization purifying treatment section in the at least one system of the chemical and volume control system, the boric acid recovery system and the spent fuel pit water coolant system, said demineralizer comprising an anion exchange resin-containing layer, wherein the anion exchange resin is: a porous anion exchange resin having a pore volume of 0.05 to 0.50 mL/g-dry resin (measured with CI form) and an average pore radius of 2 to 50 nm (measured with CI form), and said primary cooling water brought into contact with said anion exchange resin-containing layer having a boron concentration within a range from 3000 to 10000 ppm.