1) F. Masuyama, I. Ishihara, T. Yokoyama and M. Fujita : Therm. Nucl. Power (Karyoku Genshiryoku Hatuden), 46(1995), 498.
2) F. Abe, M. Igarashi, N. Fujitsuna, K. Kimura and S. Muneki : Proc. 6th Liege Conf. on Mater. for Adv. Power Eng., Part I, Forschungszentrum, Jülich, (1998), 259.
3) F. Masuyama : Rep. 123rd Committee on Heat-resisting Met. and Alloys, 38 (1997), 211.
4) K. Kimura, T. Matsuo, M. Kikuchi and R. Tanaka : Tetsu-to-Hagané, 72 (1986), 474.