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Solid Radioactive Waste Strategy Report.pdf - UK EPR

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<strong>EPR</strong> <strong>UK</strong><br />

N° NESH-G/2008/en/0123<br />

REV. A PAGE 43 / 257<br />

6.3.4 Tank Sludges<br />

<strong>Waste</strong> Steam<br />

<strong>Waste</strong> Origin<br />

TABLE 6: WASTE STREAM DATASHEET FOR TANK SLUDGES<br />

Tank Sludges<br />

During operation of an <strong>EPR</strong>, particulates can settle<br />

as a sludge in the buffer and storage tanks<br />

associated with the water auxiliary circuits (e.g.<br />

Liquid <strong>Waste</strong> Treatment System, Liquid Effluents<br />

Release System etc.). These tanks are periodically<br />

cleaned out and the sludge accumulations removed<br />

for treatment as waste.<br />

<strong>Waste</strong> Physical Description<br />

A sludge consisting of settled metal oxide<br />

particulate.<br />

Nature of <strong>Radioactive</strong> Material<br />

Sludge is contaminated with activated corrosion<br />

products and fission products. Activation products<br />

and fission products, beta and beta/gamma<br />

emitters (hydrogen-3, cobalt-60, cobalt-58,<br />

manganese-54, zinc-65, silver-110m, antimony-<br />

125, caesium-134, caesium-137, beryllium-10,<br />

carbon-14, sodium-22, chlorine-36, calcium-41,<br />

iron-55, nickel-59, nickel-63, selenium-79,<br />

strontium-90, molybdenum-93, zirconium-93,<br />

niobium-94, technetium-99, palladium-107, silver-<br />

108m, tin-121m, tin-126, iodine-129, caesium-135,<br />

samarium-151) and a very low amount of alpha<br />

emitters.<br />

Annual Arising 1 m 3<br />

Total Arising 60 m 3<br />

<strong>Waste</strong> Classification at Time of Generation ILW / LLW<br />

Main Radionuclides<br />

Iron-55<br />

Cobalt-58<br />

Cobalt-60<br />

Zinc-65<br />

Nickel-63<br />

Hazardous Substances<br />

Boron: 1.000 ppm<br />

Mercury: 5 ppm<br />

Lead: 335 ppm<br />

Nickel: 165 ppm<br />

Chromium: 190 ppm<br />

Antimony: 5 ppm<br />

Cadmium: 10 ppm

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