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SOD,UM r--- INCONEL TANK ROOF
0 0.5 1 .o 1.5 2.0
UNCLASSIFIED
ORNL-LR-DWG (4949
DISTANCE FROM BOTTOM SURFACE OF ROOF (Cm)
Fig. 1.1.7. Energy Deposition in Sodium Ex-
pansion Tank Roof Due to Gamma Radiation.
Surging and instability were noted in pump
speeds, flow rates, pumping power, and inlet and
discharge pressures
centrifuge hardware
served instabitity.
include the addition of baffles, a reduction in
PERlOD ENDING JUNE 10, 1956
bypass flow rates, and a redesign of the passages
from the pumps to the surge chamber.
CORE FLOW STUDIES
W. T. Furgerson W. J. Stelzman
D. 8. Trauger
Changes in design of both the center volute of
the axial-flow type of header and the island expansion
bellows located within the header of the
proposed ART core resulted in an unsatisfactory
core flow pattern being generated by the previously
satisfactory inlet guide vane, designated GS-2,
and the conical baffle plate, designated GS-2-
P3 (ref. 4). Under the revised design, this particular
guide vane and baffle plate combination
generated flow reversal at the island surface in
the region of the equator. Systematic relocation
of the conical baffle plate only and analysis of
the resulting core flow pattern yielded baffle plate
GS-2-Pl0, which, in combination with guide vane
GS-2, again generated a flow pattern containing
no flow reversal along either the outer core shell
or the island surfaces. Brief periods of minor
flow reversals did occur at the equator; however,
these occurred in midstream and seemed to be
caused by the turbulent condition of the fluid mass
in this region, In general, the flow generated in
the upper half of the core by this cbmbination was
extremely unstable, but it exhibited excellent surface
scrubbing, with very good transfer of fluid
from the walls,and excellent fluid niixing. Below
the equator, some improvements were noted in
the fluid flow properties; however, the streamlines
again tended to hug the inner and outer surfaces
as they approached the core outlet. Attempts had
previously been made with the original axial-flow
header to improve the flow in the lower half of
the core by means of turbulators on the island
mediately below the guide vanes and
the shell surface immediately below
e equator; however, the improvement was only
nor. This latest design is being evaluated in
the half-scale ART volumeheat-source apparatus
sfer and Physical .L
4G. D. Whitrnon, W. J. Stelzrnan, and W. T. Furgcrson,
ANP Quar. Prog. Rep. March 10. 1955, ORNL-2061,
p 24.
25