Читать книгу Management of Radioactive Waste - Jean-Claude Amiard - Страница 23
1.3.5. British classification
ОглавлениеThe British classification of radioactive waste adopts the IAEA classification into five categories by defining its own criteria for activity levels (Table 1.3).
Table 1.3. The British nuclear waste classification system (source: [OJO 14, RAH 15])
Waste classes | Characteristics of this class |
VLLW, small volume | Waste of 0.1 m3 that can be disposed of with regular garbage if it contains less than 400 kBq of activity, as well as hospital and university waste. For waste containing carbon-14 and tritium, the activity limit is 4,000 kBq |
VLLW, large volume | Radioactive waste with an upper limit of 4 MBq per ton (not including tritium) is disposed of in specified landfills. For waste containing tritium, the upper limit is 40 MBq per ton |
LLW | Containing radioactive material other than that suitable for disposal with ordinary waste, but not exceeding 4 GBq per ton of waste or 12 GBq per ton of β and γ activity |
ILW | Waste with radioactivity levels above the upper limits for LLW, but which does not generate heat |
HLW | Wastes in which the temperature can increase significantly due to their radioactivity, so this factor must be taken into account in the design of storage or disposal facilities |