Page 120 - Thermal Hydraulics Aspects of Liquid Metal Cooled Nuclear Reactors

Design of experimental liquid-metal facilities 93

440
420

400
Temperature (°C) 380

360
340

320
300

280
0 0.5 1 1.5
z (m)

Fig. 3.2.10 Axial temperature profile on pin 1 (inner pin of the bundle).

Velocity
1.39
1.25
1.11
0.97
0.83
0.69
0.55
0.42
0.28
0.14
0.00
(m/s)

0 0.01 0.02 (m)
0.005 0.015
Fig. 3.2.11 Velocity contour on a section 20mm upstream the middle spacer grid.

Fig. 3.2.11 shows the main velocity distribution in a section 20mm upstream the
middle spacer grid. The velocity field is in line with the theoretical expectations and
allows the coolability of the bundle. The secondary flow rate is not relevant for the
design of the bundle, and it is not shown.