TFA Multiyear Program Plan FY99-FY03 Page: 45 of 249
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includes development and assessment of corrosion monitoring methods that provide more
direct and real-time measurement of the corrosion potential within a tank than do corrosion
coupons. The strategy for evaluating tank integrity also includes near- and longer-term
approaches. Commercial NDE techniques will be deployed near term using an arm-based or
crawler-based system to inspect tank walls. Longer-term efforts will integrate needs from
multiple sites to define, develop, and test the specific systems needed to inspect tank floors,
inspect surfaces below a liquid level, and assess a tank's integrity before reuse or waste
retrieval. Specific technologies supported by the TFA to replace the baseline techniques
include
" Develop an electrochemical noise corrosion monitor, which is deployed through a tank
riser, for use at SRS and Hanford,
" Develop a Raman-based nitrate, nitrite, and hydroxide (NO/NO3/OH-) in-tank sensor for
corrosion inhibitor concentration monitoring at SRS.
" Develop NDE end effectors to be deployed by an LDUA or crawler-based platform.
Problem Element 1.1.2 is titled "Ventilate Tanks." The TFA's goal regarding this problem
element is to reduce the cost of active ventilation. Specific activities include
* Explore and evaluate passive ventilation concepts for use in replacement of the active
ventilation systems on specific waste tanks at SRS.
* Select and demonstrate regenerable filter systems to replace HEPA filters within the
existing active ventilation system. A commercial system will be procured for
demonstration.
Problem Element 1.1.3 is titled "Characterize Waste." The TFA's goal regarding this
problem element is to invest in tools and methods to characterize waste in situ to support
sludge and supernate processing at SRS and ORR. Specifically, the TFA will
* Develop and deliver a weight percent suspended solids monitor for SRS use in sludge
settling and decanting operations to ensure continued feed to DWPF and process
evaporators.
" Develop a sludge mapping system for ORR to determine the volumes and interface
between supemate, sludge, and/or hard heel.
" Develop and deploy nested-array fluidic sampler and at-tank analysis system into
Hanford waste tank to support feed staging for waste treatment.
Problem Element 1.1.4 is titled "Reduce Waste Volumes." The TFA's goal regarding this
problem element is to implement technologies to reduce source and recycle streams at SRS
and INEEL. Specifically, the TFA will
* Assemble a treatment train of commercially available technologies to meet the waste
acceptance criteria for SRS's liquid effluent treatment plant. Specifically, the TFA will
evaluate the use of a compact processing unit concept to avoid large capital expenditures
on new facilities. The TFA will also evaluate options for reducing mercury concentration
in this stream, which would reduce the complexity of the treatment train.Section 6 - Technical Program
6.5
TFA Multiyear Program Plan
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Allen, R. W. TFA Multiyear Program Plan FY99-FY03, report, September 28, 1998; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc794474/m1/45/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.