Long Term Population Dose due to Radon from Uranium Mill Tailings:Douglas B. Chambers, Leo M. Lowe & Ronald H. Stager
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| Table 2: UNSCEAR assumptions used to derive population dose estimate for long term release of radon from uranium mill tailings | |
| Uranium fuel requirements | 210 tU (250 t U3O8) per GW-year of electrical energy |
| Normalised tailings surface area | 1 hectare per GW-year |
| Radon release rate | 3 Bq m-2s-1 |
| Normalised emission rate | 1 TBq per year per GW-year |
| Population density | 3 km-2 < 100 km |
| Air dispersion factor at 1 km (release from semi-arid area at an effective height of 10 m) | 3 x 10-6 Bq m-3 per Bq s-1 |
| Reduction in concentration with distance | X-1.5 (X in km) |
| Dose conversion factor (equilibrium equivalent radon concentration) | 9 nSv h-1 per Bq m-3 (EEC) |
| Radon progeny equilibrium factors | 0.4 (indoors, occupancy 80%) 0.8 (outdoors, occupancy 20%) |
| Collective effective dose factor | 0.015 person-Sv per TBq |
| Cumulative exposure period | 10 000 years |
| Collective effective dose (range) | 150 (1 to 1000) person-Sv per GW-year |
Source: UNSCEAR | |
Long Term Population Dose due to Radon from Uranium Mill Tailings:Restore Frames | Sym Home | Programme | Back
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© copyright The Uranium Institute 1998