Volatility: Fluorinator Design FV-100, Zr-U Fuel Element Processing Phase Page: 2
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2.0 INTRODUCTION
Oxidmtion of UF
bubbling fluorine
for sempling purpcses.
3.1 METHODS
at process flor conditions of
trap was sealed off and the
entire straw forced through a glass wool filter cartridge attached to a
Cartridge weight increase over a specific time
corrosion specimen nozzle-
Studies were
r 9
58C
up of Of
effect ci
3.0 GAS KHM IM Iff STUDIES USING
TE MARKK XI FLUORINATOR
Fret studies by G. X. Cathers etal. indicated possible build
in a large gas chamber above the salt resulting in an equilibrating
sing suppression of UF, evolution from the welt. The double
cheaper moel avoids this conditon by creating a slightly higher velocity
vas used for deterwination of gas stream entrairwint rate,
attempted under tew nature conditions listed in Table 1.
A barren molten salt charge was used (equi-molaz HaP-ZrP,) in the Nark
II vessel to saturate nitrogen gas with ar " "
22.3 ala. The norunl eus exit through the CRP
through the reduced passege of the connecting section, thereby preventing
back flow. Laboratory work indicated increased particle settling rates as
the gas chamber approached isothermal conditions, believed to be the result
of turbulence reduction brought about by approaching a sfTewl inert gas flow
pattern.
The Nark XU double chamber nodal will consist of two 16 in. o.d.
cylindrical sections connected by a 5 in. NFS pipe with an overall heisht
of about 7 ft. (see Fig. 1). ASMS hearts will be used for the chamber tops.
The -han^nr bottoms will be conical to facilitate funneling solids through
the 5 in. neck into the lower reaction chantwx and to facilitate liquid
agitation in the lower chamber. The ASMS Boiler Code, Section 8, Unfixed
Pressure Vessels, with a mimmm corrosion allowance of 0.110 in. will apply.
The bottom rhaWr is sized for a 55 liter charge plus about 507 freeboard.
The upper chmmber is about equal in volume. All process nosales except the
gw straw exit will enter the lover chwhar top dished head in the heated
zone. The product gas stream will exit through the nozzle via way of the
5 in. inspection nosale located on top of the uvper chawber. See Figures
1, 2 and 3 for general features.
of bottom nmnge daused while jack hawwring a vaste salt charge from the
Nark XI -B Fluorinator. Three previous pilot plant node la revealed the
folloving mnjor needs 1 (1) a method for melting and draining unwanted
solidified salt from those proem 11 we extending into the molten salt,
(2) to maintain the entire reaction chamber tempereture above the salt
melting point, avoiding salt solidification on the wall and in process
lines above the salt level, (3) a solids settling chamber for precipitation
of solids and entrainment from the gas strew at tesperaturee lower than
those of the molten salt rhwhher, and (M a satisfactory method of agitation
to UFe and subsequent. volet 111 net ion accomplished by
____________ through a liquid mixture of molten fluoride salts of
zirconium, l1thium, sodium and fission products at 500-600 C requires a
special reaction vessel. Design inforwation for the Volatility Fllot Plant
Nark TTT Fluorinator is furnished. Vassal r spier sweat is rsqui red becmuse
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Ruch, J. B. Volatility: Fluorinator Design FV-100, Zr-U Fuel Element Processing Phase, report, May 28, 1959; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc1241013/m1/2/: accessed June 6, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.