Publication Laka-library:
The geochemistry of radionuclides with long half-lives. Their expected migration behaviour (1980)
| Author | B.Skytte Jensen |
| Date | April 1980 |
| Classification | 6.01.2.10/38 (TECHNICAL - GENERAL INFORMATION) |
| Front | 
|
From the publication:
Introduction The high-level radioactive waste contains several radionuclides whose lifetimes vastly exceed the time spans mankind has had experience in handling. It is obvious that no one can secure that geological or manmade structures remain undisturbed for several hundred thousand years or more. On can therefore not ascertain that some of the activity in geological disposed waste will not be released from the repository in some distant future. It is generally agreed that the only medium for transportation of eventually released activity to the biosphere is groundwater. It is therefore important to be able to predict the behaviour of the long-lived radionuclides under the conditions in groundwaters which may be found in diverse geological formations now and in the future. Although 90sr is the potentially most dangerous activity in the waste, its rather short half-life (29 years) secures that reasonable delays in its release will reduce its possible impact on the surroundings to a negligible magnitude. The long-lived radionuclides in the waste, which are formed in larger amounts, are found among the transuranium elements, i.e. 239Pu, 237Np, 241Am etc. In addition the long-lived fission product 99Tc need also be considered because it is one of the major components of the waste. Most of the chemistry of these compounds has been studied under conditions which deviate appreciably from those encountered in nature, but at present new information is published which supports predictions based on theoretical considerations.
This publication is only available at Laka on paper, not as pdf.
You can borrow the publication or request a copy. When we're available, this is possible for a small fee.