Neutronics of neutral beam injector for ITER (Japanese proposal)

✍ Scribed by T. Inoue; M. Akiba; M. Araki; M. Hanada; K. Maki; M. Mizuno; Y. Okumura; Y. Ohara; M. Seki; S. Tanaka; K. Watanabe; T. Uede; Y. Yamashita; A. Ozaki; Y. Saitoh

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 569 KB
• Volume: 18
• Category: Article
• ISSN: 0920-3796
• DOI: 10.1016/0920-3796(91)90153-h

✦ Synopsis

The design concept of the neutral beam (NB) system is described from the viewpoint of neutronics. In order to transport the high-power neutral beams into the reactor plasma, wide ports and beam drift ducts are provided in the design, resulting in a high flux of neutrons streaming into the NB system from the reactor plasma. The neutronics properties in the NB system were obtained by a two-dimensional computation. It is shown that the beamline components are exposed to a neutron flux of the order of 109-1011 neutrons/cm 2 s. The amount of the induced radioactivity in the NB room wall was estimated to be less than 10 -1° Ci/cm 3 one day after shutdown.