1. [1] Tsukamoto, N., Kaneko, J. and Shiba, S., Safety Research on Regulatory Issues of Spent Fuel Pools (Phase-1), Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority, RREP-2019-1001 (2019).
2. [2] Wallis, G. B., One-dimensional Two-Phase Flow, McGraw-Hill, New York (1969).
3. [3] Murase, M., Sano, N., Takaki, T., Nishida, K., Shimamura, T., Goda, R., Hayashi, K. and Tomiyama, A., Flow Characteristics in a 3×3 Rod Bundle under Countercurrent Flow Conditions, JSMF Multiphase Flow Symposiums 2020, Paper No. 0002 (2020).
4. [4] Sun, K. H., Flooding Correlations for BWR Bundle Upper Tie Plates and Bottom Side-Entry Orifices, Second Multi-Phase Flow and Heat Transfer Symposium-Workshop, Miami Beach, Florida (1979).
5. [5] Yamanouchi, Y., Effect of Core Spray Cooling in Transient State after Loss of Coolant Accident, J. Nucl. Sci. Technol.5, 547-558 (1968).