Evaluation and compilation of DOE waste package test data: Biannual report, August 1987--January 1988 Page: 30 of 184
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that within a laboratory, there is a relative precision of 3
to 4 percent and this is typical of routine ICP methods.
Characterization of ATM-105 continued, and gamma scanning was
completed for four boiling water reactor (BWR) rods. Gamma
scanning was initiated for another lot of ATM fuel rods and
will be completed in FY 1988. Fission gas sampling of one
rod showed approximately 112 cm3 of fission gas, and in
another rod the sampling showed almost four times this
amount. In later attempts to fission-gas-sample BWR fuel
rods, the wall plug lens appeared to be radiation damaged.
Another lens was ordered, and it will be installed. The
system used for fission-gas-sampling will be recalibrated.
Calculations showed that the new Criticality Safety
Specification (CSS) batch limits could be met for an ATM-103
and ATM-104 or for an ATM-103 and ATM-106, but could not be
met to segment a third rod. A new storage container is being
designed to solve this problem.
Two ATM-105 rods were sectioned for characterization. To
date, ATMs-103, 104, 106 and two ATM-105s have been
sectioned to produce 137 analytical samples and 31 fuel
sections for storage and future testing. Photomicrographs
were taken of ATM-105 as-polished specimens to examine
fission product particles and inner and outer oxide layers on
the cladding. Samples of ATMs-103, 104, 105, and 106 were
examined with transmission electron microscopy (TEM), and the
common five-metal epsilon-ruthenium phase was found with some
barium zirconate particles within the ruthenium phase. The
five-metal epsilon-ruthenium phase consists of the elements,
Mo, Tc, Ru, Rd and Pd. This phase usually is found in the
micron particle size range near the center of fuel which has
been exposed to high temperatures. The use of TEM revealed
this phase in the nanometer particle size range and showed
that the phase was present in other areas and at the edge of
the fuel. Details of this work will be given in the ATM-103
report. ATM-104 showed the presence of particles with up to
50 percent xenon. This was observed earlier in ATM-101 and
may be common in LWR fuels.
MCC has generated over 100 different samples. The MCC sample
inventory system will be computerized. A detailed inventory
of all MCC ATMs was started. This inventory will provide a
means of verifying control and availability of ATMs and of
disposing of unneeded specimens used in preparing the ATMs.
Radiochemical analyses for ATMs-104, 106 and 105 were
completed. Draft reports have been prepared on the
characterization of ATMs-103, 104 and 106. Work is nearly
complete on meeting software control procedures for license
related work which apply to ORIGEN-2. Work will be planned
to develop a method for analyzing the C-14 content of crud on18
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Interrante, C.; Escalante, E.; Fraker, A.; Ondik, H.; Plante, E.; Ricker, R. et al. Evaluation and compilation of DOE waste package test data: Biannual report, August 1987--January 1988, report, August 1, 1988; United States. (https://digital.library.unt.edu/ark:/67531/metadc691054/m1/30/: accessed March 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.