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Sub seabed disposal of high level radioactive wastes

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Title Sub seabed disposal of high level radioactive wastes
 
Creator Krishnamoorthy, T M
Nair, R N
Sarma, T P
 
Description 1-8
Diffusion and advection controlled migration of radionuclides through sub seabed sediments is analyzed to determine the flux at the sediment-water boundary which is subsequently translated into radionuclide concentration in ocean water. The emplaced canister is modelled as an area source and analytical solutions are obtained for two modes of releases, viz. instantaneous release and release due to leaching from a fixed inventory, the formed being a worst case condition. Results indicate little influence of canister/waste matrix integrity on concentration. Any radionuclide with a half-life < 105 y and Kd > 103 ml.g-1 will not appear in ocean surface water when buried at 10 m. Unlike other radionuclides, 129I and 238U show appreciable and more or less uniform concentration for burial depths ranging from 1-50 m under all conditions studied. Sensitivity of pore water velocity, porosity and temperature on concentration is examined and found that they affect the radionuclide concentration by different rates.
 
Date 2016-12-06T10:24:03Z
2016-12-06T10:24:03Z
1990-03
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/38175
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.19(1) [March 1990]