Mound Laboratory Progress Report for December, 1964 Page: 20 of 47
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In two r , 10.23 grams of Bat 0, were prepared trtjim the iiventury of enriched methane. T he material
produced was at 92" enrichment in carbon-13 and ontained 1.16 grams of carbun-13. The capacit of the
conversion system has been increased up to 0.7 gram ot carbon-13 can now be converted to barium car-
bonate n a single run.
Chemical Exchange Inprr _d techniques in the operation of the carbon dioxide-monoethanolamine cheri-
cal exchange apparatus incitedsed the separation factor for carbon- f3 from 1.10 to 1.20 for comparable re-
action times. The separation factor of 1.20 represents a value corresponding to about 20% of the time re-
quired to -each equilibrium. Evidence was found that carbon dioxide is still present in the dissociated
amine sol.,tion which is recirculated through the system. Increased decomposer temperatures indicate that
decomposition was not complete.
HELIUM
A new charcoal trap in a cylindrical shape instead of a coil is being prepared for tritium removal experi-
ments. The second experimental run on the charcoal trap in the coil shape shtrwed no reduction of tritium
from an initial concentration of 10-1%. This was insufficient to meet our specification of 2xl0-% The
trap had been evacuated and heated for degassing. The new style trap is expected to allow better degas-
sing of the charcoal bed through improved conductance.
cNEON
The 96-foot. 4-column. +stage cascuae for the en-
richment of the neon isotopes was started with gas
containing reon-21 enriched to about 2%. The total
amount of neon-21 in the system was approximately
600 cc. After 5 days the neon-21 peak reached a con-
centration of 19%.
The static neon-21 profile is shown mn Figure 5.
ARGON
In a four-stage cascade system, draw-off of argon-
36 with a concentration of greater than 99.98% from
the top of the fourth stage at the rate of 1.8 milli-
liters per hour has allowed a slow decrease of the
concentration at the bottom of the last stage to 99.26%
argon-36. At the same time the concentration of
argon-38 in the bottom of the third stage has in-
creased to 9.0%. Figure 6 shows the change in
argon-3B concentration at the bottom of the third
stage over a period of about two months.'lU
72
g
I
e
E
0
U48
240 20 40 60 80
Neon-21 Concentration, %100
Figure S. Neon-21 Profile in the 96-Foot Thermal
Diffusion Column After Running Under Static Con-
ditions for 5 Days-
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EIchelberger, J.F.; Grove, G.R. & Jones, L.V. Mound Laboratory Progress Report for December, 1964, report, December 21, 1964; United States. (https://digital.library.unt.edu/ark:/67531/metadc930121/m1/20/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.