Preliminary review on isotope separation of long life fission products; Application research of laser isotope separation to Cs

Oshita, Hironori; Ozawa, Masaki; Ishikawa, Makoto; Koyama, Shinichi; Akatsuka, Hiroshi*

JAEA-Review 2007-031, 41 Pages, 2007/09

JAEA-Review-2007-031.pdf:3.73MB

Recently establishment of self consistent nuclear fuel cycle has been required with respect to economical efficiency, safety and reduction of the load to the environment. Especially Cs included in spent fuel of nuclear power plants has extremely long half life (3.010y) and its water solubility leads to the anxiety of exudation into ground water in geologic disposal. Recent technology development of laser has come to make it possible in principle to excite a specific isotope and separate it making use of the intrinsic physical and chemical properties of the excited state. This document reports the review of the isotope separation principle and its application to Cs separation.

International Sodium Handling Technology Training Course

Aoki, Tadao; Sawada, Makoto; Oshita, Hironori; Matsuno, Yoshiaki*; Kitano, Akihiro; KAMEI, Michiru*

JNC TN4520 2004-001, 350 Pages, 2004/09

JNC-TN4520-2004-001.pdf:36.76MB

none

The key development of high power CW electron linac(IV); Preliminary result of high power experiment for a traveling wave resonant ring and klystron output windows

Toyama, Shinichi; ; Hirano, Koichiro; Oshita, Hironori; Nomura, Masahiro; ; Takahashi, Nobutomo

PNC TN9430 93-002, 43 Pages, 1993/01

PNC-TN9430-93-002.pdf:1.44MB

[Background] Development of a CW electron linac which can accelerate a few order higher beam current is under development in PNC. So far, design of main components: accelerating tube and a klystron has been carried out. This time high power RF experiment of the developed components was carried out without electron beam. [Objective] An experiment with high power RF was carrying out in order to validate the design of the components. In regard to ceramic windows for the klystron, improvement of its design was found necessary in accordance with the experiment in last year. Therefore the design was improved, and high power RF experiment was carried out for test window manufactured based on the improved design. [Method] The test system for a accelerating tube and klystron windows was constructed and high power RF experiment was carried out using this system where the trial klystron was used as high power RF source. The experiment was carried out in National Laboratory for High Energy Physics (KEK) in Tsukuba where the high voltage DC power supply is available. [Result] The traveling wave resonant ring was successfully driven with 800 kW RF power which is around the final goal in the case of no beam loading. The unexpected thermal dissipation was observed at the phase shifter of the resonant ring because of its high RF attenuation. The klystron windows that have the optimized design dimension could transmit the 1.7 MW RF power which is strongest over the world in L-band. [Conclusion] The validity of the design of traveling wave resonant ring and klystron windows was demonstrated by high power RF loading experiment. But, the phase shifter needs more improvement to make it possible to use under hundreds of high power RF.

None

Oshita, Hironori; Toyama, Shinichi; Hirano, Koichiro; Konashi, Kenji; Sasao, Nobuyuki; Sato, Isamu

PNC TN8410 91-048, 92 Pages, 1991/02

PNC-TN8410-91-048.pdf:1.75MB

None

None

; Omura, Akiko; Yamazaki, Yoshio; ; Hirano, Koichiro; Oshita, Hironori

Proceedings of LINAC 94, , 

None