IDEA #95DF90 Novel multilayer cylindrical container for storage nuclear waste and nuclear fuel

NEW MATERIALS NOVEL MULTILAYER CYLINDRICAL CONTAINER FOR STORAGE NUCLEAR WASTE AND NUCLEAR FUEL Description The creation of novel, high dense, long body multilayer cylindrical containers having high absorbing properties again neutron and gamma irradiation was developed at Tsulukidze Institute of mining and Technology. The cylindrical multilayer billets were obtained using ex- plosive consolidation technology. The loading intensity were changed up to 10 GPa and low detonation velocity explosive materials such as ammonite (D=3.14km/sec) and its blend with saltpeter were used as an explosive materials. The basic multilayer container walls as well as bottom and cover consists from Al-B(B4C)-Pb(PbO) –Al(Fe) layers. The containers without inner Al(steel) layer and consisting from Al-B4C-Pb & Al-(B+Pb) layers were developed too. Depending on the intensity and density of irradiation the high enriched B10 isotope and oxide of Pb can be applied instead of common B and lead correspondently. The new approach to consolidate and to fabricate long body billets in one time loading process makes possible to fabricate multilayer cylindrical containers with high dense layers from consolidated boron(B) and lead(Pb). The novelty of this new approach hinges on the appli- cation specially developed schemes and assessors pro- viding formation multilayer high dense walls and cov- ers for containers. The practical results of developed multilayer cylindrical containers and different parts are presented in Figures 1 and 2. It was established that developed containers are characterized with high absorbing and strength proper- ties against neutron and γ irradiation, suitable, light during transportation and ecologically friendly. a) b) Figure 1. The pilot sample of developed multilayer container Al-(B4C+Pb)-steel. A) General View; b) Separated cover and body of container. There were carried out the comparative study of physi- cal-mechanical properties and of structure /property relation of obtained consolidated multilayer containers. Innovative Aspect and Main Advantages The study of obtained multilayer containers and evalu- ating their efficiency for storage of radioactive materi- als shows the evident difference in contrast to conven- tional methods of storage nuclear waste and fuel. The simply and low cost technology of fabrication cylindri- cal containers that includes application only low cost and overdue industrial explosives and further simple treatments by lathe of obtained billets makes offered new type containers (figure 1) attractive having high commercial potential for modern countries. Areas of Application The developed multilayer cylindrical containers having high absorbing properties against neutron and γ irradia- tion successfully may be applied during the storage and transportation of nuclear waste and nuclear fuel. Figures 2. Explosively fabricated billets (different dimensions) of container’s central parts with different content of protective layer. Stage of Development The development is ready for patent application and licensing. Contact Details: Dr. Akaki Peikrishvili Science and Technology Centre in Ukraine Information Office in Tbilsi 7, E. Mindli str. Tbilsi, 0186, Georgia Tel: (+995.32) 321657 Email: stcu@internet.ge ; akaki.peikrishvili@stcu.int