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Journal Articles

Radiochemical research for the advancement of $$^{99}$$Mo/$$^{rm 99m}$$Tc generator by (n,$$gamma$$) method, 2

Fujita, Yoshitaka; Seki, Misaki; Namekawa, Yoji*; Nishikata, Kaori; Kato, Yoshiaki; Sayato, Natsuki; Tsuchiya, Kunihiko; Sano, Tadafumi*; Fujihara, Yasuyuki*; Hori, Junichi*; et al.

KURNS Progress Report 2019, P. 157, 2020/08

no abstracts in English

Journal Articles

Radiochemical research for the advancement of $$^{99}$$Mo/$$^{rm 99m}$$Tc generator by (n,$$gamma$$) method

Fujita, Yoshitaka; Seki, Misaki; Namekawa, Yoji*; Nishikata, Kaori; Kimura, Akihiro; Shibata, Akira; Sayato, Natsuki; Tsuchiya, Kunihiko; Sano, Tadafumi*; Fujihara, Yasuyuki*; et al.

KURNS Progress Report 2018, P. 155, 2019/08

no abstracts in English

Journal Articles

Neutron irradiation effect of high-density MoO$$_{3}$$ pellets for Mo-99 production

Fujita, Yoshitaka; Nishikata, Kaori; Namekawa, Yoji*; Kimura, Akihiro; Shibata, Akira; Sayato, Natsuki; Tsuchiya, Kunihiko; Sano, Tadafumi*; Fujihara, Yasuyuki*; Zhang, J.*

KURRI Progress Report 2017, P. 126, 2018/08

no abstracts in English

Journal Articles

Molybdenum adsorption and desorption properties of alumina with different surface structures for $$^{99}$$Mo/$$^{99m}$$Tc generators

Suzuki, Yoshitaka; Kitagawa, Tomoya*; Namekawa, Yoji*; Matsukura, Minoru*; Nishikata, Kaori; Mimura, Hitoshi*; Tsuchiya, Kunihiko

Transactions of the Materials Research Society of Japan, 43(2), p.75 - 80, 2018/04

no abstracts in English

Journal Articles

Compatibility between Be-V alloy and F82H steel

Tsuchiya, Kunihiko; Namekawa, Yoji; Ishida, Takuya

Journal of Nuclear Materials, 386-388, p.1056 - 1059, 2009/04

 Times Cited Count:0 Percentile:100(Materials Science, Multidisciplinary)

Beryllium alloys such as Be-Ti and Be-V have been expected as promising candidates for advanced neutron multipliers of DEMO blankets from viewpoints of high melting point, high beryllium content, low radio activation, good chemical stability. In this study, the compatibility between Be-V alloy and F82H was investigated. The Be-7at%V specimens that includes $$alpha$$Be and Be$$_{12}$$V phases were tested. From the XRD analysis of the specimens after annealing of the Be-V alloy in contact with F82H, reaction products such as BeNi and Be$$_{2}$$Fe were observed on the surface of F82H. The thickness of reaction layer between Be-V alloy and F82H was about 10$$mu$$m. Thus, it has been clarified that compatibility between Be-V alloy and F82H is better than that between Be and F82H.

Oral presentation

Compatibility tests between Be-7at%V alloy and SS316LN

Tsuchiya, Kunihiko; Namekawa, Yoji; Ishida, Takuya; Emori, Noriyasu

no journal, , 

Beryllium alloys such as Be-Ti and Be-V have been expected as promising candidates for advanced neutron multipliers of DEMO blankets from viewpoints of high melting point, high beryllium content, low radio activation, good chemical stability. In this study, the compatibility between Be-V and SUS316LN was investigated. The Be-7at%V specimens that includes $$alpha$$Be and Be$$_{12}$$V phases were tested. After annealing of the Be-V in contact with SS316LN, white reaction zones were observed on the surface of SS316LN. From the XRD analysis, reaction products such as BeNi and Be$$_{2}$$Fe were observed on the surface of SS316LN and intensity of these peaks increased with increasing annealing temperature and time. The thickness of reaction layer between Be-V and SS316LN was smaller than that between Be and SS316LN and the thickness was less than 1/5. Thus, it has been clarified that compatibility between Be-V and SS316LN is better than that between Be and SS316LN.

Oral presentation

Vacuum improvement of J-PARC 3GeV synchrotron

Kamiya, Junichiro; Noshiroya, Shiyoji; Namekawa, Yuya; Hikichi, Yusuke; Sato, Atsushi; Kinsho, Michikazu; Yanagibashi, Toru*

no journal, , 

The 3 GeV synchrotron (Rapid Cycling Synchrotron: RCS) in J-PARC facility is one of the highest proton beam power accelerators, aiming 1 MW beam power. The RCS was completed in 2007. Since then, the vacuum system of the RCS has been stably operated through the steady/non-steady maintenances and the additional upgrades. This report aims to introduce the upgrade in the RCS vacuum system and the vacuum status of the beam line during the accelerator operation period.

Oral presentation

Development of alumina adsorbents for $$^{99}$$Mo/$$^{99m}$$Tc generator, 2; Effect on molybdenum adsorption of alumina with different surface properties

Suzuki, Yoshitaka; Namekawa, Yoji; Kitagawa, Tomoya*; Matsukura, Minoru*; Kurosaki, Fumio*; Nishikata, Kaori; Matsui, Yoshinori; Mimura, Hitoshi*; Tsuchiya, Kunihiko

no journal, , 

no abstracts in English

Oral presentation

Development of alumina adsorbents for $$^{99}$$Mo/$$^{99m}$$Tc generator, 1; Effect on surface properties and crystal structure of alumina by sintering conditions

Kitagawa, Tomoya*; Kurosaki, Fumio*; Yoneyama, Takashi*; Matsukura, Minoru*; Mimura, Hitoshi*; Suzuki, Yoshitaka; Namekawa, Yoji; Tsuchiya, Kunihiko

no journal, , 

no abstracts in English

Oral presentation

Molybdenum adsorption and recovery properties of alumina adsorbent for $$^{99}$$Mo/$$^{99m}$$Tc generator

Suzuki, Yoshitaka; Namekawa, Yoji*; Kitagawa, Tomoya*; Kakei, Sadanori*; Matsukura, Minoru*; Yoshinaga, Hideo*; Mimura, Hitoshi*; Tsuchiya, Kunihiko

no journal, , 

no abstracts in English

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