Solid Radioactive Waste Strategy Report.pdf - UK EPR

EPR UK
N° NESH-G/2008/en/0123
REV. A PAGE 46 / 257
6.3.7 Air and Water Filters
TABLE 9: WASTE STREAM DATASHEET FOR AIR AND WATER FILTERS
Waste Steam
Air and Water Filters
Waste Origin
All radiation controlled areas of the nuclear
auxiliary building, fuel building, safeguards
buildings, reactor building, operational production
centre, access building and waste treatment
building are served by dedicated ventilation
systems. The extract from these systems is
subject to a number of airborne activity abatement
techniques, including the use of HEPA filtration,
before discharge to the environment. The
abatement systems will therefore produce a
number of spent HEPA filters over the course of
reactor operations. These HEPA filters have the
potential to be classed as radioactive waste should
they have arrested any radioactive particulate or
aerosol.
In addition, water filters may arise from filtering of
the low active effluent filtration (Gaseous
Treatment System, Liquid Waste Treatment
System, Steam Generator Blowdown System)
Waste Physical Description
Cartridges are composed principally of stainless
style 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 (metal oxide) contamination up to a few
Bq/g.
Annual Arising 4 m 3
Total Arising 240 m 3
Waste Classification at Time of Generation LLW
Main Radionuclides
Cobalt-58
Iron-55
Cobalt-60
Silver-110m
Manganese-54
Hazardous Substances
Boron: 8150 ppm
Lead: 904 ppm
Chromium: 333 ppm
Nickel: 291 ppm
Arsenic, antimony, mercury: 7 ppm
Beryllium: 0.3 ppm
Selenium: 3 ppm
Cadmium: 15 ppm