1. 1) M. Taneike, F. Abe and K. Sawada : Nature, 424 (2003), 294.
2. 2) S. Ukai, M. Harada, H. Okada, M. Inoue, S. Nomura, S. Shikakura. K. Asabe, N. Nishida and M. Fujiwara : J. Nucl. Mater, 204 (1993), 65.
3. 3) National Institute for Metals Creep Data Sheet, No. 3B, National Research Institute for Metals, Tokyo, (1986).
4. 4) National Institute for Metals Creep Data Sheet, No. 43, National Research Institute for Metals, Tokyo, (1996).
5. 5) Final Report of Research Group on Strengthening of Heat Resisting Steel and Alloy, ISIJ, Tokyo, (2000).