Science and Technology of Nuclear Installations

Research Article

CFD Modeling of Wall Steam Condensation: Two-Phase Flow Approach versus Homogeneous Flow Approach

Table 1

Injection characteristics of the TOSQAN ISP47 test (mass flow rates and temperatures).
StageDescriptionProposed timeSteam mean mass flow rate (g/s)Injection mean temperature (°C)Air mean mass flow rate (g/s)Helium mean mass flow rate (g/s)Mean condensing wall temperature (°C)
0Initial phase−600–0 1 0 1 . 3 ± 1
1Transient 10–18001.40 to 1.14,
linear  function
of time		 1 2 4 ± 3 1 0 1 . 8 ± 1
1 + 1aTransient 1 + short steady state 1a1800–5000 1 . 1 4 ± 0 . 0 5 1 2 5 ± 3
1bTransient air5000–5600 1 . 1 4 ± 0 . 0 5 1 2 5 ± 3 3 . 1 6 ± 0 . 0 2
2Steady state 15600–6500 1 . 1 1 ± 0 . 1 0 1 2 6 ± 0
3 + 4Transient 2 and steady state 26500–9500 1 2 . 2 7 ± 0 . 1 2 1 3 4 ± 0 1 0 7 . 8 ± 1
5Transient 39500–12000 1 . 1 1 ± 0 . 1 1 1 3 1 ± 0 1 0 1 . 8 ± 1
6Steady state 312000–13000 1 . 1 1 ± 0 . 0 6 1 2 6 ± 0
6aTransient air13000–13600 1 . 1 1 ± 0 . 0 6 1 2 6 ± 0 3 . 1 6 ± 0 . 0 2
6bShort steady state 6b13600–14000 1 . 1 1 ± 0 . 0 6 1 2 6 ± 0
7Transient 414000–146001.11 to 0.89
linear function
of time		 1 2 6 ± 4 1 . 0 3 ± 0 . 0 2
8Steady state 414600–18000 0 . 8 9 ± 0 . 0 8 1 3 8 ± 0