1. (1) K. Yamazaki, S. Uemura, T. Oishi, J. Garcia, H. Arimoto, and T. Shoji : “Burning plasma simulation and environmental assessment of tokamak, spherical tokamak and helical reactors”, Nucl. Fusion, Vol. 49, 055017 (6pp) (2009)
2. (2) K. Yamazaki, T. Oishi, and K. Mori : “Environmental and Economic Assessments of Magnetic and Inertial Fusion Energy Reactors”, Nucl. Fusion, Vol. 5, 1103004 (6pp) (2011)
3. (3) F. Najmabadi and The ARIES Team : “Spherical torus concept as power plants - the ARIES-ST study”, Fusion Engineering & Design, Vol. 65, pp. 143-164 (2003)
4. (4) S. Nishio, K. Tobita, K. Tokimatsu, K. Shinya, I. Senda, et al. : “Technological and Environ- mental Prospects of Low Aspect Ratio Tokamak Reactor VECTOR”, 20th IAEA Fusion Energy Conf., IAEA-CN-FT/P7-35, Vilamoura, Portugal (2004)
5. (5) K. Tobita, S. Nishio, M. Sato, S. Sakurai, T. Hayashi, et al. : “SlimCS — compact low aspect ratio DEMO reactor with reduced-size central solenoid”, Nucl. Fusion, Vol. 47, pp. 829-899 (2007)