Immobilization of long-lived radionuclides in carbon matrices produced with the use of polyimide binders
- V. G. Khlopin Radium Institute, 194021, 28, 2nd Murinsky pr., Saint-Petersburg (Russian Federation)
- Institute of Macromolecular Compounds RAS, Russian Academy of Sciences (IMC RAS), Bolshoi pr.31, Saint-Petersburg, UR-199004 (Russian Federation)
- RAS, Petersburg Nuclear Physics Institute (PNPI), 188300 Gatchina (Russian Federation)
- Kinectrics Inc., 800 Kipling Avenue, Toronto, Ontario M8Z 6C4 (Canada)
Available in abstract form only. Full text of publication follows: Conditions for immobilization of long-lived radionuclides {sup 99}Tc, {sup 129}I and {sup 241}Am in carbon matrices were investigated by using their chemical analogs. Stable isotopes of rhenium, iodine and europium were used as chemical analogs of {sup 99}Tc, {sup 129}I and {sup 241}Am, respectively. It is shown that the carbon matrices incorporating the above elements can be produced by carbonization of composites with ITA-31 polyimide binder of the following composition: equal molar ratio between dianhydride of 3,3/,4,4/-benzophenone-tetracarboxylic acid and tetraacetyl derivative of 4,4/-diaminodiphenyl ester, radionuclide being investigated or its chemical analog and carbon fabric as reinforcing component. The elements under investigation were used both in the form of salts or oxides and in the form of their complexes with ion-exchange resins. The produced composites were carbonized in inert gas (argon) or in vacuum. The physical-chemical properties of the samples were studied. It was revealed that the resultant matrices meet the requirements imposed on waste storage and final disposal. (authors)
- Research Organization:
- American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5990 (United States); Technological Institute of the Royal Flemish Society of Engineers (TI-K VIV), Het Ingenieurshuis, Desguinlei 214, 2018 Antwerp (Belgium); Belgian Nuclear Society (BNS) - ASBL-VZW, c/o SCK-CEN, Avenue Hermann Debrouxlaan, 40 - B-1160 Brussels (Belgium)
- OSTI ID:
- 21156510
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fluorinated and nonfluorinated polyimides based on 4,4{double_prime}-diamino-p-terphenyl
Benzophenone derivatives as fuel additives