Patent Number: 048805955
Section: claims

1. A process for cleaning nuclear reactor cooling water, which comprises contacting nuclear reactor cooling water with an ion exchange resin mixture of (a) 50 to 90% by weight of a cation exchange carboxylic acid-based resin having an average particle size of 30 to 60 .mu.m, and (b) 10 to 50% by weight of anion exchange resin, said mixture being reinforced with 10 to 40% by weight of reinforcing fibers on a dry basis of total weight of said resins and said fibers, thereby trapping cruds or cations in the cooling water; wherein the cation exchange carboxylic acid-based resin is a straight chain type ion exchange resin whose ion-exchange groups are bonded to other elements than carbon atoms constituting a benzene ring. 2. A process according to claim 1, wherein the cation exchange carboxylic acid-based resin is at least one of acrylic carboxylic acid resin and methacrylic carboxylic acid resin. 3. A process according to claim 1, wherein a bonding energy of ion-exchanging groups of said cation exchange carboxylic acid-based resin is not more than 300 KJ/mole. 4. A process according to claim 1, wherein said ion exchange resin mixture is made up of 60 to 85% by weight of said cation exchange carboxylic acid-based resin and 15 to 40% by weight of said anion exchange resin.