ORNL-2106 - the Molten Salt Energy Technologies Web Site

ANP PROJECT PROGRESS REPORT
4.0
0.8
0.6
\
O' 0.4
0.2
fsBRw
ORNL-LR-DWG 44740
o n n o 0 0
/CORE SHELL
P
.-CORE SHELL
4 I' :.'El ANNULUS
REFLECTOR
e' f *
0
0 0.2 0.4 0.6 08 1.0
f/f
Fig. 4.1.3. Effect of Local Eccentricity on Flow
Distribution.
the flow distribution in the annulus. Radial
displacement of the shell was found to cause a
slight spiraling of the flow through the annulus.
The configuration studied and the experimental
data obtained are shown in Fig. 4.1.4. The data
are in good agreement with a simple, derived
expression based on parallel and equal system
flow resistances. For a mean radial eccentricity
(tl/io) of 0.8 the maximum deviation of the ratio
Ql/Q3 is about 0.8. The static pressures as a
function of position in the annutus and in the inlet
header were also obtained for the concentric and
eccentric cases and are being analyzed.
Fuel Flow in Core
Further studies of the flow through the 21-in.
ART core model with the Pratt & Whitney vortex
generators installed in the entrance region were
delayed pending the construction of a second test
stand for the core-model experiments. Studies of
other core configurations that may give stable
flow were, however, initiated. In the preliminary
study the following three configurations are being
considered: a core with an area expansion rate
obtained from Nikuradse's gamma function, a
222
4.0
0"
\ 0.9
0-
0.8
0.8 0.9 4.0
td
'0
Fig.4.1.4. Effect of Radial Eccentricity on Flow
Distribution.
ezm€T t
ORNL-LR-DWG (4984
cylindrical annular core with a large area ex-
pansion at the entrance and screens of perforated
plates placed in the region of expansion to obtain
good flow characteristics, and the present 21-in.
core with screens or perforated plates in the
expansion region.
ART CORE HEAT TRANSFER EXPERIMENT
N. D. Greene
G. W. Greene
L. D. Palmer
F. E. Lynch
G. L. Muller
H. F. Poppendiek
The instrumentation and operating character-
istics of the ART volume-heat-source experiment,
described previously,b were checked, and the
galvanometer used with the transient thermo-
couples was calibrated. Fifteen complete power
runs were made for the swirl entrance system.
6N. D. Greene et al., ANP Quar. Prog. Rep. Dec. 10,
1955, ORNL-2012, P 174.
t
.