Structural design for intermediate heat exchanger of the HTTR

Kunitomi, Kazuhiko; Takeda, Takeshi; Shinozaki, Masayuki; Okubo, Minoru; *; Koikegami, Hajime*

Nihon Genshiryoku Gakkai-Shi, 37(4), p.316 - 326, 1995/00

https://doi.org/10.3327/jaesj.37.316

no abstracts in English

MONJU Primary prototype pump test

*; *; *; *; *

PNC TN941 85-79, 157 Pages, 1985/05

PNC-TN941-85-79.pdf:3.61MB

In-sodium test was carried out for MONJU primary prototype pump, having a new hydrostatic bearing and convection suppressing fin. The test parameters were sodium level in the pump and flow of the seal gas. The test results are summarized as follows. (1)The pump operated satisfactorily on each condition of low sodium level with and without seal gas and normal sodium level without seal gas. This shows the pump has the soundness even in the cases of primary piping broken and the seal gas stopped. (2)It was obtained from the low sodium level test that each time of radial temperature difference for both inner and outer casings was its maximum and stable respectively. (3)It was approved that the maximum radial temperature differences for both inner and outer casings were increased with the time passing and sodium level falling, and also approved that the time which the temperature differences became their maximum were short with sodium level falling. (4)Maximum displacement of outer casing was smaller than the approved value at the lowest sodium level test, so it seems there is no problem on the real pump operation. (5)The test showed that convection suppressing fin was useful why the displacement of the casings were suppressed, because the times of the maximum radial temperature differences of the casings were late and displacement of outer casing was increased slowly. (6)It was approved that the pony motor of the pump was stopped and started again satisfactorily at the lowest sodium level.

MONJU Primary prototype pump test; Pony motor system performance test

; *; *; Aoki, Tadao; *; *

PNC TN941 82-216, 62 Pages, 1982/09

PNC-TN941-82-216.pdf:2.57MB

This report describes the performance test of pony motor system mounted on the MONJU primary prototype pump. The test was conducted under various operation modes, and the following results were obtained: (1)The transition from the main motor to the pony motor was achieved very smoothly. (2)The transmission of the pony motor system worked well with its speed and torque kept constant. (3)start-up of a pump with a pony motor was accomplished very smoothly. (4)Apony motor current was about 6365% of it rated operation. (5)A characteristics of pony motor system in high temperature atomosphere remained as same as that in the room temperature. (6)The amplitude of pony motor bearing vibration during operation was a little.

Experimental evidences of light's orbital angular momentum carried by helical undulator harmonics

Sasaki, Shigemi*; Miyamoto, Atsushi*; Hosaka, Masahito*; Yamamoto, Naoto*; Kyo, Ayataro*; Kato, Masahiro*; Imazono, Takashi; Koike, Masato

no journal, , 

The phenomenon of higher harmonic radiation from a helical undulator carrying orbital angular momentum (OAM) attracts a great deal of attention because this novel property may be used as a new probe for synchrotron radiation science that would be performed in diffraction limited light source facilities. Although a diffraction limited VUV and X-ray sources do not yet exist, the 750 MeV UVSOR-III is already a diffraction limited light source in the UV region. In this ring, a tandem-aligned double-APPLE undulator system is installed. Using this set-up, we observed spiral interference patterns between two different harmonic radiations with a scanning fiber multi-channel spectrometer and a CCD camera placed at the end of BL1U beamline. By these measurements, various interference patterns such as single, double, and triple spirals were observed which concur with the theoretical prediction for every mode in the right or left circular polarization.