Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Tsuchiya, Kunihiko; Nishikata, Kaori; Tanase, Masakazu*; Shiina, Takayuki*; Ota, Akio*; Kobayashi, Masaaki*; Yamamoto, Asaki*; Morikawa, Yasumasa*; Takeuchi, Nobuhiro*; Kaminaga, Masanori; et al.
Proceedings of 6th International Symposium on Material Testing Reactors (ISMTR-6) (Internet), 9 Pages, 2013/10
no abstracts in English
Tanase, Masakazu*; Shiina, Takayuki*; Ota, Akio*; Fujisaki, Saburo*; Kawauchi, Yukimasa*; Kimura, Akihiro; Nishikata, Kaori; Yonekawa, Minoru; Ishida, Takuya; Kato, Yoshiaki; et al.
no journal, ,
Preliminary studies for obtaining Tc from, (n,
)
Mo produced in JMTR has been carried out, as a part of the industrial use expansion after JMTR will re-start. In order to obtain high specific-volume of
Tc, a method was proposed for extracting
Tc with MEK, followed by purification and concentration with acidic and basic alumina. In this study, preliminary tests, aiming construction of production system, were carried out using Re instead of
Tc because Re and Tc are homologous elements. The average recovery yield of Re was very high to be 98%. Based on the result, an apparatus for
Tc production was assembled.
Tsuchiya, Kunihiko; Tanase, Masakazu*; Shiina, Takayuki*; Ota, Akio*; Kobayashi, Masaaki*; Morikawa, Yasumasa*; Yamamoto, Asaki*; Kaminaga, Masanori; Kawamura, Hiroshi
no journal, ,
no abstracts in English
Shiina, Takayuki*; Tsuchiya, Kunihiko; Nagai, Yasuki; Morikawa, Yasumasa*; Takeuchi, Nobuhiro*
no journal, ,
According to statistical data reported by the Japan Radioisotope Association (JRIA) in 2014, the Mo/
Tc generator and
Tc injections (
Tc labeled pharmaceuticals) continues to account for approximately 80% of the entire in-vivo supply in Japan. Furthermore, the number of
Tc injection supplies is approximately four times larger than that of the
Mo/
Tc generator. Therefore, Chiyoda Technol Co. have performed a research and development (R&D) for the domestic production of
Tc in cooperation with the Japan Atomic Energy Agency (JAEA) and FUJIFILM RI pharma Co., Ltd. to ensure a constant and reliable supply of
Tc. CTC therefore has a plan to stably produce
Tc from
Mo, which can be produced by the
Mo(n,
) reaction using the Japan Materials Testing Reactor (JMTR) and by the
Mo(n,2n) reaction using some new cyclotrons, and thereby to meet the Japanese demand for
Tc together with pharmaceutical companies in Japan. These production methods of
Mo were selected from viewpoints of safety, nuclear proliferation resistance and waste management. The specific activity of
Mo produced by these methods, however, is very low compared with that of (n,f)
Mo. Therefore, it is essential to develop some techniques for separation, concentration and recovery of
Tc, and it will be necessary to choose the best methods such as a wet method by solvent extraction and a dry method by sublimation, finally. In future, we aim to provide to about 20% of the domestic demand for
Mo using the JMTR and cyclotrons, 100-200 6-day Ci per week at the end of irradiation, and will carry out empirical studies for the commercial production of
Tc.
Nishikata, Kaori; Kimura, Akihiro; Shiina, Takayuki*; Yamamoto, Asaki*; Ishida, Takuya; Ota, Akio*; Tanase, Masakazu*; Takeuchi, Nobuhiro*; Morikawa, Yasumasa*; Kobayashi, Masaaki*; et al.
no journal, ,
no abstracts in English
Shibata, Akira; Ishida, Takuya; Shiina, Takayuki*; Kobayashi, Masaaki*; Tanase, Masakazu*; Kato, Yoshiaki; Kimura, Akihiro; Ota, Akio*; Yamamoto, Asaki*; Morikawa, Yasumasa*; et al.
no journal, ,
Tc, a daughter nuclide of
Mo, is commonly used as a radiopharmaceutical. In case of Japan, all of
Mo are imported from foreign countries. R&D for domestic production of
Mo by the (n,
) method has been being performed in JMTR from viewpoints of nuclear proliferation resistance and waste management. In this study, experiments of
Mo/
Tc production were performed to enhance recovery yields of
Tc. High-density MoO
pellets were irradiated in the Kyoto University Reactor (KUR). Solvent extraction method with MEK was used to extract
Tc from
Mo/
Tc solution and the maximum recovery yields as high as 80% was achieved. Quality tests were performed, and impurities in
Tc solution were evaluated and were efficiently low. It is concluded that
Tc solution produced by this method is suitable for a raw material of radiopharmaceutical.