Treatment Method for Fermi Barrel Sodium Metal Residues Page: 23 of 40
This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
3.6 Barrels ANL#1135 and
1116
No hydrogen was found in Barrels
ANL#1135 and 1116 with the portable hydrogen
monitor when the barrel bungs were first
opened.
Before the initial carbon dioxide purge,
the hydrogen and oxygen monitors on the vent
line were verified to be in working order, and
additional temperature probes were installed on
the outer surface of the barrels.
Barrels ANL#1135 and ANL#1116 were
purged with dry carbon dioxide one at a time,
but were treated simultaneously (in a serial
arrangement) with humidified carbon dioxide.
Due to the high temperatures encountered earlier
during the dry carbon dioxide purge step, it was
felt that it was safer to purge each barrel by
itself.
- Oxygen - - Hydrogen
4.00 g EE
4.50 1 1tE
3 .00 1 1l 1
C1
2.50
r 2.00
1.50
8 1.00
0.50
1.000.0 1.0 2.0 3.0
Time (hours)4.0 5.0
Figure 17. Barrels ANL#1135 and 1116
measured H2 and 02 concentrations during dry
CO2 purge
The sodium oxide/carbon dioxide reaction
inside both barrels was strong, and the barrel
temperatures at the bottom of the barrels peaked
at 300 and 220 C, respectively. The reaction
was sustained for longer than ten minutes in
Barrel ANL#1135, indicating that there was a
larger amount of sodium oxide in the barrel than
the other barrels treated. These strongtemperature peaks were accompanied by smoke
from the outside bottom of the barrels. In spite
of the smoke, the bottom of the barrels was not
visibly scorched. The measured hydrogen and
oxygen concentrations during the dry carbon
dioxide purge of these barrels are shown in
Figure 17.
The two barrels were purged
simultaneously in a serial arrangement starting
at 12/1/2004 15:06 and ending at 12/14/2004
15:30. Figure 18 shows the measured hydrogen
and oxygen concentrations during the first three
days of treatment. The figure was truncated at 3
days because no significant changes occurred in
the measured hydrogen concentration after the
first three days.
Oxygen - - Hydrogen
0.70
c 0.50
0 0.40
0.30
C
c0.20-
0.10
0.00
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Time (days)
Figure 18. Barrels ANL#1135 and 1116
measured H2 and 02 concentration during
humidified CO2
The barrels were treated in an upright position
for 1.7 days, and were then placed on their sides
for further treatment. The short step increase in
the measured hydrogen concentration at Day 1.7
indicates the point where the drums were rotated
to their sides. The drums were rotated again to
the other side after about 5 days, but no change
occurred in the measured hydrogen and oxygen
concentration. Presumably all of the residual
sodium in the barrels had reacted at that point,
and none remained to cause any increase in the
hydrogen measurement.16
Upcoming Pages
Here’s what’s next.
Search Inside
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Sherman, Steven R. & Knight, Collin J. Treatment Method for Fermi Barrel Sodium Metal Residues, report, June 1, 2005; [Idaho Falls, Idaho]. (https://digital.library.unt.edu/ark:/67531/metadc884276/m1/23/: accessed April 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.