Prediction of Flow Regimes and Thermal Hydraulic Parameters in Two-Phase Natural Circulation by RELAP5 and TRACE Codes

Table 6

Simulations with different flow regime transition boundaries.

Simulation number	Bubbly-to-slug transition boundary	Slug-to-annular transition boundary
0 (default)	10^−3 (default)	0.9 (default)
1	0.25	0.9 (default)
2	0.05	0.9 (default)
3	10^−5	0.9 (default)
4	10^−8	0.9 (default)
5	10^−3 (default)	0.55
6	0.25	0.55