Apparatus for the reduction of tritium emissions into the atmosphere Page: 5 of 7
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Fig. 2.
Environmental Control -System.
1. Holding tank
2. Pressure switch
3. Relief valve
4. Air supply
5. Bellows pump
6. Catalytic converter
7. 4-way valve
8. Molecular sieve containers
9. Solenoid valves
10. Needle valves
11. Programmer
12. Pressure regulator
In -M- Out
IvTContainer
filled with
molecular sieve
pellets0
0
0
a
O
00
0
a
O
0o
0
DO
0OSeparator
plateButterfly
v alve
Fig. 3. Molecular sieve container.,1
2Fig. 4. Molecular sieve containers.
1. Filling cap
2. Butterfly valve
is removed. The remaining dry gas passes back
through the 4-way valve and out a stack. Process-
ing stops when the pressure in the holding tank is
reduced to a value preset on the pressure switch.
The proposed mounting location made it neces-
sary to make the system as compact as possible.
General dimensions are indicated in Fig. 2. The
two molecular sieve containers have butterfly valves
mounted on funnelled bases so the contaminated sieve
pellets (Linde Molecular Sieve - Type 13X) can be
drained periodically and replaced. Figures 3 & 4
illustrate the basic sieve container desJ.gn. Soft
copper tubing and flare fittings are used through-
out.
III. CONTROL AND ELECTRICAL SYSTEM
The ECS is controlled by a stepping switch pro-
grammer (see Fig. 5). The programmer is basically
a drum made up of disks which rotate as a single
unit through 24 positions. Pegs which fit on the
rim of a disk actuate a lever-operated switch when
the disk is roated to the proper position. The pro-
grammer is provided with connections to induce singles
5.
C-1
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Dube, C.M.; Coffin, D.O. & Stoll, R.D. Apparatus for the reduction of tritium emissions into the atmosphere, report, June 1, 1973; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1033776/m1/5/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.