Assessment of CTF Boiling Transition and Critical Heat Flux Modeling Capabilities Using the OECD/NRC BFBT and PSBT Benchmark Databases

Table 4

Geometry and power shape for test assemblies A2 and A3 [2].

Item	Data
Assembly
Rods array	5 × 5	6 × 6
Number of heated rods	25	36
Number of thimble rods	0	0
Heated rod outer diameter (mm)	9.50	9.50
Thimble rod outer diameter (mm)	—	—
Heated rods pitch (mm)	12.60	12.60
Axial heated length (mm)	3658	3658
Flow channel inner width (mm)	64.9	77.5
Radial power shape	A	D
Axial power shape	Uniform	Uniform
Number of MV spacers	7	7
Number of NMV spacer	2	2
Number of simple spacers	8	8
MV spacer location (mm)	457, 914, 1372, 1829, 2286, 2743, 3200
NMV spacer location (mm)	0, 3658
Simple spacer location (mm)	229, 686, 1143, 1600, 2057, 2515, 2972, 3429