Test plan for engineering scale electrostatic enclosure demonstration Page: 29 of 46
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7. Shut down the experiment in the reverse order of the start up
8. Remove filter and coupon samples, after weighing place samples in petri dishes, and save
for SEM or chemical analysis
9. Recover as much soil as possible during clean up of thz enclosure and ventilation test
section and place any paper towels used in clean up in the compactible radioactive waste
container according to the TRA procedure.
5.3.2 CRT Tests
The CRT is placed in the duct position as shown in Figure 4. Steps 1 through 3 and 5 through
9 of the test procedure in Section 5.3.1 are repeated. The data for this test will be the mass loading
of dust caught on the plastic screen, inlet and outlet cyclone samplers, cascade impactor filters, and
SEM and radiochemical analysis of samples from these filters.
5.3.3 Electret Filter Tests
The electret filter is placed in the duct as shown in Figure 2. Steps 1 through 3 and 5 through
9 of the test procedure in Section 5.3.1 are repeated. The data for this test will be the mass loading
of dust caught in the electret filter, outlet filter, cascade impactor filters, and SEM and radiochemical
analysis of samples from these filters.
5.4 Data Analysis
The data analysis includes the following items:
. Coupon samples and filters will be weighed on a 0.0001 g balance.
" Particle size distributions will be determined from cascade impactor filters.
" The SEM will be used to characterize the particle size and composition of the collected
dust. This includes further study of the plutonium contaminates that exist primarily as
independent particles and those attached to or combined with other materials that make
up dust particles.
" Coupon samples and filters will be sent to the radiochemical laboratory for analysis to
determine 239Pu content. The radiochemistry will include selected cascade impactor filters
for determining 239Pu content of different particle size ranges.
The particle mass data and results of the radiochemical analysis will be presented in the form
of tables and bar graphs. The measured amounts of dust and 239Pu from coupons of the different
materials will be compared to determine the effectiveness of grounding the conducting materials as
compared to the polyethylene (insulation material). The input and output cyclone sampler filters
from the ventilation system test section will be used to determine how much 239Pu is removed by the
various ESC devices (e.g., plates, CRT, and electret).18
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Meyer, L. C. Test plan for engineering scale electrostatic enclosure demonstration, report, February 1, 1993; Idaho Falls, Idaho. (https://digital.library.unt.edu/ark:/67531/metadc1317964/m1/29/?rotate=90: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.