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XI Conclusions
Pages 121-126

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From page 121...
... the framework in which this must be done is workable: to the DOE uses conformance to a schedule (i.e., meeting milemaximum extent practical, retrieve the waste from the tanks stones) as one of three criteria in determining what constiand separate the recovered waste into high- and low-activity tutes removal of waste to the maximum extent practical in fractions; and dispose of both waste remaining in tanks and the Section 3116 draft waste determination for Tanks 19 and recovered low-activity waste on-site in a manner that pro- 18 at the Savannah River Site.
From page 122...
... Following erly, decoupling for individual tanks need not delay the final closure, modification of stabilized tank waste that is left on- closure of the tank farms. There is little technical advantage site will be difficult, meaning that the form, concentration, in the accelerated closure of the tanks.
From page 123...
... was funded by is to adopt a more risk-informed, participatory, transparent, DOE's Office of Science and Technology to provide technical assistance and consistent decision-making process. Such a process, as with issues related to tank wastes at the Savannah River Site, Hanford Site, recommended in a previous National Research Council Idaho National Laboratory, Fernald Site, and West Valley Demonstration report (NRC, 2005b)
From page 124...
... The Hanford bulk vitrification process is currently committee reiterates, however, that DOE should seek alter- less well developed technically than either the Savannah natives to the DDA process, either by slowing waste inputs River Site saltstone or the Idaho National Laboratory steam (slowing operations or gaining efficiencies) or by finding reforming.
From page 125...
... The committee judges that monitoring in greater detail for processing purposes and to confirm within the disposal facility is the most desirable location for compliance with performance objectives, but this must be the early detection of problems, followed by detection in the done after waste retrieval when mixing makes representative vadose zone, and finally by detection in the nearest aquifer. sampling of the retrieved waste possible and when samples The committee's overall impressions are that the sites' moniof the tank heels can be taken.
From page 126...
... approach and by · Remediation of pipelines, leaking underground pipes following a risk-informed, consistent, and transparent and interwall spaces in double-walled tanks, and other methodology, such as the one outlined in a previous National auxiliary equipment in the tank farms could be challenging, Research Council report Risk and Decisions About Disposiparticularly at Hanford where there are about 100 plugged tion of Transuranic and High-Level Radioactive Waste pipelines (see Chapter III)


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