ORNL-1771 - Oak Ridge National Laboratory

ANP QUARTERLY PROGRESS REPORT
UNCL ASSIFIE D
Y -12601
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Fig, 7,9. Type-310 Stainless-Steel-Clad Copper
Brazed to Inconazl Tubing with Coast Metals Alloy
52 and Exposed to Static Air at 1500OF for 400 hr.
As polished. 50X. Reduced 16%.
Radiator Fabrication
P. Patriarza
G. EA. Slaughter
Metallurgy Division
J. M. Cisar
Ai rcmft Reactor Engineering Division
A sodium-ta-air radiator witti 6 in. of type-430
stainless-steel-clad copper fins was fabricated by
using a combination heliarc welding and brazing
procedure. The tube-to-fin section was assembled
and brazed with Coast Metals alloy 52 at 1020°C.
The split headers ,were then assembled and heliarc
welded by using the seniiautomatic equipment
available in the Welding Laboratory. A photograph
of the radiator arid welding torch after the welding
of the 108 tube-to-header joints is shown in Fig.
7.1 1.
The remaining header sections were then manually
heliarc welded by utilizing the complete penetrafion
technique. Although a pressure test indicated that
six tube-to-header joints were not leak-tight, a
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F i 3. 7. IO. Type430 Stai aal es s-Steel-CI ad Copper
Bra~ed with Coast Metals Alloy 52 and Exposed
to Static Air at 15OQOF for 400 kr. As polished,
5QX. Reduced 17.5%.
back-brazing operation satisfactorily sealed the
leaks ondremo~ed the effects of notches as sources
of stress concentrations. The completed unit, as
shown in Fig. 7.12, was helium leak-tight after the
rebrazing operation. This unit is to be used in the
100- kw g os- f i red 1 i qui d-metal- heating sys tern.
NOZZLES FOR THE GAS-FIRED
I IQUID-ME TAL-H E AT E R SYSTEM
P. Patrinrca
K. W. Reber G. M. Sluughter
Metallurgy Division
J. M. Cisar
Aircraft Reactor Engineering Division
One of the design features of the 100-kw gas-fired,
liquid-metal-heater system now being constructed is
the packed-rod nozzle assembly to be used for inlet
control of the air and the gas flow. Test data aid
theoretical considerations indicated that &-in.-dia
stainless steel triangularly packed sods would be
satisfactory for use in this nozzle. It was expected
that these rods could be joined in a rigid bundle