May 23 – 27, 2017
Seoul
Asia/Seoul timezone

Progress in Ultra-Low-Radioactive titanium production

May 26, 2017, 3:30 PM
20m
Seoul

Seoul

Oral Session 8

Speaker

Mr Alexander Chepurnov (SINP MSU)

Description

Basic principles of titanium production together with very high technological culture of titanium industry predefined a possibility to develop a technological cycle of the ultra-low-radioactive titanium (ULR-Ti) production. It was confirmed experimentally that it is possible to produce a titanium sponge with a level of contaminations below 1 mBq/kg of U and Th within an industrial Kroll-process. At the next step ULR-Ti sponge was converted into the construction titanium of VT-00 grade using EB-vacuum melting followed by bi-directional cold rolling and annealing to avoid a recontamination and keep the material as pure as the original sponge. The mechanical properties of the manufactured ULR-Ti fit demands for the VT-00 grade. Hence, this material could be used for production of cryostats, containment tanks, passive shielding and other mechanical elements of the modern low-background detectors. It was also tested and confirmed that a laser welding is preferable to an arc welding in order to keep ULR-Ti original purity. The mass of the first ULR-Ti bunch produced for test purposes and spent for radio-purity and mechanical tests at different production stages was of a scale of tens kilos. The jump from a laboratory kilos scale to the tons scale needs additional investigations. But it should be noted, that current kilos scale samples where manufactured by the standard industrial processes.

Primary author

Mr Alexander Chepurnov (SINP MSU)

Co-authors

Dr Alexander Chub (Solikamsk Magnesium Plant) Dr Elena Mozhevitina (Dmitry Mendeleev University of Chemical Technology of Russia) Prof. Igor Avetisov (ARMOLED Ltd) Dr Ivan Nikulin (Laboratory of Radiation Physics, Belgorod National Research University) Prof. Vadim Glebovsky (Institute of Solid State Physics Russian Academy of Sciences) Mr Vladimir Pavletsov (Lomonosov Moscow State University, Faculty of Physics) Dr Yury Suvorov (Physics and Astronomy Department, University of California)

Presentation materials