Estimation Tests for Effecting Factor on Decontamination Property in Crystallization Process

Kusama, Makoto*; Chikazawa, Takahiro*; Tamaki, Yoshihisa*

JNC TJ8400 2005-006, 88 Pages, 2005/02

JNC-TJ8400-2005-006.pdf:5.67MB

In crystallization unit, UNH (Uranyl Nitrate Hydrate) crystals are washed by a nitric acid solution to get high decontamination factor, but the data on UNH crystals dissolution by washing procedure is insufficient to evaluate the effectiveness of crystallization unit. So, in this study, the effect of a nitric acid concentration to UNH crystals dissolution and decontamination factor was tested. As results, it was found that UNH-crystals dissolution was suppressed as the nitric acid concentration was higher, for example UNH-crystals dissolution by 1N nitric acid washing becomes half as compared with 8N solution washing. And as for the decontamination factor of UNH crystals, it was found that these values by 1N nitric acid washing raised 2-times as compared with 8N nitric acid washing. It was suggested that the decontamination factor of UNH-crystals have the correlation to UNH-crystals dissolution, and shown that UNH crystals loss by washing is 10~20wt% in this experiment.In addition, the crystallization behavior tests used a simulated spent fuel dissolved solution which was prepared by cold FP elements was carried out in a batch-wise experimental method. As results, it was found that in the condition of the feed solution in process design study, Ba element is crystallized with UNH, but other elements were remained in mother liquid. Besides, in the condition of the feed solution contained extreme quantity of Cs than process design concentration, it was found that Cs element was crystallized with UNH. On the other hand, the decontamination factor of other elements except Ba and Cs was about 10 after crystal-liquid separation by filtration, and then increased about 100 after crystal washing. It was confirmed that UNH crystal purity was increased by crystal-liquid separation and washing procedure.

Characteristics of Alfvn eigenmodes, burst modes and chirping modes in the Alfvn frequency range driven by negative ion based neutral beam injection in JT-60U

Kusama, Yoshinori; Kramer, G. J.; Kimura, Haruyuki; Saigusa, Mikio*; Ozeki, Takahisa; Tobita, Kenji; Oikawa, Toshihiro; Shinohara, Koji; Kondoh, Takashi; Moriyama, Shinichi; et al.

Nuclear Fusion, 39(11Y), p.1837 - 1843, 1999/11

https://doi.org/10.1088/0029-5515/39/11Y/324

no abstracts in English

ICRF heating of plasmas with internal transport barrier during reversed magnetic shear experiments in JT-60U

Iwase, Makoto; Koide, Yoshihiko; Tobita, Kenji; Moriyama, Shinichi; Takenaga, Hidenobu; Fujita, Takaaki; Shirai, Hiroshi; Kusama, Yoshinori; Nemoto, Masahiro; Oikawa, Toshihiro; et al.

Proc. of 13th Topical Conf. on Applications of Radio Frequency Power to Plasmas, p.116 - 119, 1999/04

no abstracts in English

Progress of procurement for ITER components in Japan

Inoue, Takashi; Kusama, Yoshinori; Sugimoto, Makoto; Okuno, Kiyoshi; Nakajima, Hideo

no journal, , 

At present, construction of ITER is in progress at its site in south France, Saint Paul Lez Durance, and in parallel, fabrication of ITER core components and systems are also on-going at 7 Parties. Japan have already completed fabrication of the TF coil superconducting conductors of Japanese share. The TF coil and CS coil conductors are already in production phase for real ITER components. For neutral beam (NB) system, whole system equivalent to that of ITER is being manufactured in advance to test the system at NB test facility (NBTF) at Padua Italy. The power supply components produced in Japan have departed in October 2015 as the 1st shipment to Italy. Outline of design, R&D, and procurement of components of Japanese share, such as Electron Cyclotron system, Blanket remote handling system, Diagnostics (Poloidal polarimeter, Edge Thomson scattering, Divertor impurity monitor and IR thermography etc.), Divertor outer target and Test Blanket Module (TBM) are also reported.