Recent progress in the energy recovery linac project in Japan

Sakanaka, Shogo*; Akemoto, Mitsuo*; Aoto, Tomohiro*; Arakawa, Dai*; Asaoka, Seiji*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; et al.

Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.2338 - 2340, 2010/05

http://accelconf.web.cern.ch/AccelConf/IPAC10/papers/tupe091.pdf

Future synchrotron light source using a 5-GeV energy recovery linac (ERL) is under proposal by our Japanese collaboration team, and we are conducting R&D efforts for that. We are developing high-brightness DC photocathode guns, two types of cryomodules for both injector and main superconducting (SC) linacs, and 1.3 GHz high CW-power RF sources. We are also constructing the Compact ERL (cERL) for demonstrating the recirculation of low-emittance, high-current beams using above-mentioned critical technologies.

None

; ; Sana, Kazuya; ;

JNC TN3410 2001-005, 29 Pages, 2001/04

JNC-TN3410-2001-005.pdf:2.38MB

None

Radiation shielding analysis of the Fugen nuclear power station

; ; ; 2 of others*

PNC TN3410 88-025, 11 Pages, 1988/09

PNC-TN3410-88-025.pdf:0.38MB

The radiation shielding analysis of pressure tube type heavy water reactors was performed using the discrete ordinate transport code, dot 3.5. The present paper describes the analytical methods developed to calculate the dose rates after shutdown in various regions such as pressure tubes, outside the primary shield and penetrations through the primary shield and calandria tank. The calculation methods were applied to analyze the dose rates in Fugen measured by neutron and -ray detectors. These calculated results are in good agreement with the measured values within a factor of approximately 3.

Gamma Dose Rates in the Pressure Tubes of Fugen Nuclear Power Station

; ;

PNC TN341 84-16, 13 Pages, 1984/11

PNC-TN341-84-16.pdf:0.38MB

Evaluation of gamma dose rates in the pressure tube and the streaming through the lower radiation shield of pressure-tube-type heavy water reactor, Fugen, is necessary for design and maintenance of this type of reactor. Calculations of these values using computer programs were made and compared with the experimental results; doser ates in a pressure tube surrounded with fuels and without fuels in adjacent tubes were calculated and the results were in good agreement with the experimental on es.

Development and production of cables for ITER

Takahashi, Yoshikazu; Nabara, Yoshihiro; Nunoya, Yoshihiko; Suwa, Tomone; Tsutsumi, Fumiaki; Oshikiri, Masayuki; Ozeki, Hidemasa; Shibutani, Kazuyuki*; Kawano, Katsumi; Kawasaki, Tsutomu*; et al.

no journal, , 

Japan Atomic Energy Agency (JAEA) is procuring all amounts of NbSn conductors for Central Solenoid (CS) in the ITER project. Before start of mass-productions, the conductor should be tested to confirm superconducting performance in the SULTAN facility, Switzerland. The cable with a shorter twist pitch shows no degradation of Tcs against to electromagnetic load cycles. However, it is difficult to make the cable, because the diameter of the cable with shorter twist pitch is larger and the cable has to compact more. The technology for the cables with STP was developed in Japanese cabling suppliers. The several key technologies and production will be described in this paper.