Solid Radioactive Waste Strategy Report.pdf - UK EPR

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