Solid Radioactive Waste Strategy Report.pdf - UK EPR

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EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 40 / 257 6.3.1 Ion Exchange Resins TABLE 3: WASTE STREAM DATASHEET FOR ION EXCHANGE RESINS Waste Stream Ion Exchange Resins Waste Origin Ion exchange beds are used to minimise soluble radioactive material This material results from corrosion in the primary circuit (mainly in the steam generators) and activation of chemicals in the primary circuit) in the following UK EPR water auxiliary circuits: · Chemical and Volumetric Control System; · Coolant purification system; Spent fuel Storage Compartment Treatment System. The ion exchange resins in the beds are periodically changed to optimise their performance. The spent resins are treated as waste. Waste Physical Description Small spheres (diameter range 0.3 - 1.2mm) of organic resins with polystyrenic, phenolic, acrylic or formophenolic skeleton (cationic resins strongly acid, anionic resins strongly basic and mixed bed resins) Nature of Radioactive Material Activated corrosion products and fission products removed from auxiliary water circuits. Annual Arising 3 m 3 Total Arising 180 m 3 Waste Classification at Time of Generation ILW Main Radionuclides Hazardous Substances Nickel-63 Cobalt-60 Caesium-137 Cobalt-58 Silver-110m Boron: 9000 ppm Mercury: 20 ppm
EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 41 / 257 6.3.2 Spent Filters TABLE 4: WASTE STREAM DATASHEET FOR SPENT FILTERS Waste Stream Spent Filters Waste Origin Corrosion occurring in the steam generators results in particulate corrosion products becoming mobile in the primary circuit [Ref.27]. Upon passing through the reactor core, these corrosion products can become neutron activated. Filters are used to capture and hence minimise such particulate material in the EPR water auxiliary circuits. Spent filter cartridges arise from the treatment lines of water auxiliary circuits: Chemical and Volumetric Control System, Boron Recycle System, Liquid Waste Treatment System, spent fuel Storage Compartment Treatment System. Water filters are withdrawn from operation on the basis of clogging and/or dose rate. Waste Physical Description Cartridges are composed principally of stainless steel supports with glass fibre filter and some organic materials. The amount of particulate radioactive material (metallic oxides) trapped on each filter may be variable. Nature of Radioactive Material Particulate activated corrosion products filtered from water auxiliary circuits. Annual Arising 5 m 3 Total Arising 300 m 3 Waste Classification at Time of Generation 275 m 3 ILW 25 m 3 LLW Main Radionuclides Cobalt-58 Iron-55 Cobalt-60 Silver-110m Manganese-54 Hazardous Substances Boron: 6,000 ppm Lead: 425 ppm Nickel: 210 ppm Chromium: 240 ppm Cadmium: 11 ppm Arsenic, antimony, mercury: 5 ppm Beryllium, selenium: 0.2 ppm
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