The concentration of corrosion products and other impurities which produce undesirable radionuclides must be maintained at extremely low values in the primary coolant systems of nuclear power plants to keep the resulting dose rate below certain maximum values. This has been normally accomplished in the past by low temperature ion exchange of the pressurized water coolant.

Development of an axial bed filter which can remove radioactive corrosion products from high purity pressurized water coolant at operating temperatures is described. 8.4.5

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