Solid Radioactive Waste Strategy Report.pdf - UK EPR

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EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 44 / 257 6.3.5 Evaporator Concentrates TABLE 7: WASTE STREAM DATASHEET FOR EVAPORATOR CONCENTRATES Waste Steam Evaporator Concentrates Waste Origin The UK EPR proposes to make use of evaporation for the minimisation of radioactive liquid effluents arising from the non-recyclable Liquid Waste Treatment System. Evaporation will be used to minimise the discharge of active aqueous effluents. Evaporation of effluents results in the production of a sludge-like concentrate that will contain the bulk of the radioactivity initially present in aqueous effluent streams. These concentrates contain on average 40,000 ppm of boron and have a total salinity of 300 g/L and are liable to crystallise if concentrated further. Waste Physical Description Concentrated sludge containing some activated metal oxides. The concentrate contains a high level of boron (17,000 ppm) and can crystallise if the boron concentration exceeds 40,000 ppm. Nature of Radioactive Material Sludge is contaminated with activated corrosion products and fission products. Annual Arising 3 m 3 Total Arising 180 m 3 Waste Classification at Time of Generation LLW Main Radionuclides Iron-55 Cobalt-58 Cobalt-60 Silver-110m Nickel-63 Hazardous Substances Boron: 1.000 ppm Mercury: 5 ppm Lead: 335 ppm Nickel: 165 ppm Chromium: 190 ppm Antimony: 5 ppm Cadmium: 10 ppm
EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 45 / 257 6.3.6 Low Activity Resins TABLE 8: WASTE STREAM DATASHEET FOR LOW ACTIVITY RESINS Waste Steam Low Activity Resins Waste Origin The Steam Generator Blowdown System is used to recycle blowdown water to the EPR secondary circuit [Ref. 28]. The steam generator blowdown is purified by the use of two parallel filters for the removal of suspended solids and two parallel demineralisation lines which use ion exchange resins to perform the demineralisation. Waste Physical Description Very low active Ion exchangers resins removed from the purification treatment lines of the Steam Generator Blowdown System. Made of balls or grains (diameter ranges 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). Suppliers: PUROLITE, DOWEX, ROHM&HAAS. Nature of Radioactive Material Contamination with soluble activated corrosion products and fission products up to 10 Bq/g. Annual Arising 7.5 m 3 Total Arising 450 m 3 Waste Classification at Time of Generation LLW / VLLW Main Radionuclides Activation products and fission products, beta and beta/gamma emitters (Cobalt-60, caesium-134, caesium-137, beryllium-10, carbon-14, chlorine-36, calcium-41, iron-55, nickel-59, nickel-63, selenium- 79, strontium-90, molybdenum-93, zironium-93, niobium-94, technetium-99, pallasium-107, silver- 108m, tin-121m, tin-126, iodine-129, caesium-135, samarium-151). Hazardous Substances Lead: 22 ppm Chromium: 18 ppm Nickel: 4 ppm Mercury: < 0.5 ppm
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