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Yagi, Masahiro; Watanabe, Masanori; Oyama, Koji; Yamamoto, Kazuyoshi; Komeda, Masao; Kashima, Yoichi; Yamashita, Kiyonobu
Applied Radiation and Isotopes, 67(7-8), p.1225 - 1229, 2009/07
Times Cited Count：11 Percentile：57.89(Chemistry, Inorganic & Nuclear)Kusunoki, Tsuyoshi; Magome, Hirokatsu; Takeuchi, Masaki; Kobayashi, Shinsho*; Yamashita, Kiyonobu
no journal, ,
JAEA has been conducting practical irradiation for production of Neutron-Transmutation-Doped-Silicon (NTD-Si) since 1977. The JRR-3 and JRR-4 of JAEA are used to irradiate Silicon ingots at present. A Silicon ingot is irradiated with an irradiation facility in the heavy water reflector tank in the JRR-3. The maximum size of silicon ingot which can be irradiated in the facility of JRR-3 is about 152 mm (6 inches) in diameter and 600 mm in length. A silicon ingot is irradiated in the irradiation facility by the side of reactor core in the JRR-4. The maximum silicon ingot which can be irradiated in JRR-4 is about 125 mm (5 inches) in diameter and the 400 mm in length. The amount of NTD-Si was about 3.7 tons at the JRR-3 and about 0.7 tons at the JRR-4 in 2006 Japanese fiscal year. We are planning to investigate the expansion technology of the NTD-Si productivity in the JRR-3.
Yanagisawa, Kazuaki; Inoue, Tomio*; Hayakawa, Kazushige*; Shiotari, Harutaka*; Nakamura, Yoshihide*; Matsuyama, Kazuya*; Nagasawa, Kiyoshi*
no journal, ,
The economic scale of radiological technology in medicine/dentistry in 2005 was about 13 billion dollars. Economic scale of medical/dental cares in 2005 was large to the magnitude of 17% than that in 1997. It is worthy of mentioning that almost radiological items used in medical/dental cares were increased except a radioisotope examination in medical care. Namely, radioisotope examination was 1.7 million dollars in 1997 but was 0.4 million dollars in 2005. No radioisotopes were used in the examination of dentist.
