ML20210J550
| ML20210J550 | |
| Person / Time | |
|---|---|
| Issue date: | 03/25/1986 |
| From: | Thomas Nicholson NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | Evans D ARIZONA, UNIV. OF, TUCSON, AZ |
| References | |
| NUDOCS 8604030489 | |
| Download: ML20210J550 (4) | |
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.s a 3 1305 Dr. Daniel D. Evans Department of Hydrology _&
Water. Resources University of Arizona Tucson, AZ 85721
Dear Dr. Evans:
As we discussed during the program review conducted January, I would appreciate the inclusion of an executive sunnary in your final report. This summary should address, the progress made with regard to those questions which have been developed by our waste management staff.
In addressing these questions you should reference the more detailed discussion in the body of the report and/or appendices.
Questions that should be addressed in developing the executive summary are:
o How do you measure matrix flow in the unsaturated zone?
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How do you measure fracture flow in the unsaturated zone?
o Is film flow, plug flow, or some combination dominant in fractures? Does it matter in terms of unsaturated flow on a scale relevant to repository siting?
o In terms of unsaturated flow on a scale relevant to repository siting does it matter whether flow is matrix or fracture?
o What are the key properties affecting fluid and vapor flow and transport?
o How can key hydrologic parameters be measured in the unsaturated zone, (e.g.,
liquid and vapor flux, and degree of saturation)? When would we expect that reasonably good measurements of these parameters can be made?
o What can be said about the applicability of existing unsaturated finw data in porous soils for describing flow in fractured rocks?
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What will be the effect of thermal loading in the unsaturated zone? Will it desaturate surrounding media or create recharge pathways in the waste horizon?
o What progress has been make toward assessment of radionuclide retardation and other relatively important flow and transport mechanisms?
o Please highlight results which are presently useable for characterization of the unsaturated zone, and explain their utility.
Sincerely, Thomas J. Nicholson Earth Sciences Branch Division of Radiation Programs &
Earth Sciences Office of Nuclear Regulatory Research cc:
J. Linehan, WMRP, NMSS X. Stablein, WMRP, NMSS P. Justus, WMGT, NMSS J. Pohle, WGT, NMSS M. Fliegel, WMGT, NMSS Distribution /R-2811:
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o What will be the effect of thermal loading in the unsaturated zone? Will it desaturate surrounding media or create recharge pathways in the waste horizon?
o What progress has been make toward assessment of radionuclide retardation and other relatively important flow and transport mechanisms?
o Please highlight results which are presently useable for characterization of the unsaturated zone, and explain their utility.
Sincerely, Thomas J. Nicholson Earth Sciences Branch Division of Radiation Programs &
Earth Sciences Office of Nuclear Regulatory Research cc:
J. Linehan, WMRP, NMSS K. Stablein, WMRP, NMSS P. Justus, WMGT, NMSS J. Pohle, WMGT, NMSS M. Fliegel, WMGT, NMSS Distribution /R-2811:
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a. L a i?i b Dr. Daniel D. Evans Department of Hydrology &
Water Resources University of Arizona Tucson, AZ 85721
Dear Dr. Evans:
As we discussed during the program review conducted January, I would appreciate the inclusion of an executive sumary in your final report. This sumary should address, the progress made with regard to those questions which have been developed by our waste management staff.
In addressing these questions you should reference the more detailed discussion in the body of the report and/or appendices.
Questions that should be addressed in developing the executive sumary are:
o How do you measure matrix flow in the unsaturated zone?
o How do you measure fracture flow in the unsaturated zone?
o Is film flow, plug flow, or.some combination dominant in fractures? Does it matter in terms of unsaturated flow on a scale relevar,t to repository-siting?
o In terms of unsaturated flow on a scale relevant to repositore siting does it matter whether flow is matrix or fracture?
o What are the key properties affecting fluid and vapor flow and transport?
o How can key hydrologic parameters be j
measured in the unsaturated zone, (e.g.,
i ligeid and vapor flux, and degree of saturation)? When would we expect that reasonably good measurements of these pc.rameters can be made?
o What can be said about the applicability of' existing unsaturated flow data in porous soils for describing flow in fractured rocks?
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