Management of Commercially Generated Radioactive Waste - U.S. ...

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Page 3.1.30. Third paragraph, first sentence. Timber is more comnon
than steel for use in sets with lagging. This sentence should be
Page 5.8. First pa-agraph last line. ". . . 3) use of nuclear parts as
a safeguard measure. Should parts be parks?
ISF is not listed in the glossary.
changed to read ". . . to (timber or steel sets with lagging)." Page 1.6, par. 3, sentence 2: It should be pointed out that we know little
Third paragraph, second sentence. This sentence is not completely
correct. It should be modified to read ". . . .drilled into the rock
and either mechanically anchored or grouted to the rock."
of the actual geochemical and hydrologic conditions prevailing during the
Oklo nuclear reactions, making it difficult to relate those phenomena to
any present environments; nor do we know much of the history of conditions
which prevailed in the millenia after the reactions were sustained.
Third paragraph, fourth line. The sentence starting on this line
should read: "Steel wire mesh, metal sheets, or beams are. . .
Page 1.12, par. 4: There is too much emphasis on the 600 m depth here and
in other places in the report. That is an apparently arbitrary depth. The
Third paragraph, seventh line. The sentence starting on this line
should read "Timber or steel sets are structural. . . .
actual optimum depth is dependent not only on rock type but geohydrologic
conditions and other site and waste characteristics.
.Com st t on . s e ot s s ae
Page 3.1.30. Footnote. Coment on shale strength. Most shales are
layered and their properties perpendicular to the layering are much
different from those parallel to the layers. Hence, any number on shale
Page 1.12, par. 5: The four media mentioned are not "representative of all
geologic media." They are only examples of the typs being considered for
repositories; suggest rewording to that effect.
properties should reference its orientation. Page 1.13, par. 3, last sentence: Not all of shale's properties are
Page 3.1.31. Second paragraph, fourth line. The statement "(sometimes
called rock bursting)" should be removed because it propagates confusion
on the true meaning of rock burst. It is not necessary to the sense of the
sentence can sometimes which be will sudden read, and with hazardous." its removal, "Slabbing during construction
"intermediate"--perhaps only its thermo-mechanical and hydraulic properties.
Its adsorptive properties are probably superior to the other three media and
Its hydraulic properties could be comparable or superior in some cases.
Page 1.13, par. 4, 4 line e 10: Not only hydraulic gradients should be measured
in situ but other hydraulic and geochemical parameters such as permeability,
Page 3.1.35. Last paragraph. The resins used with resin grouted bolts porosity, and sorptive properties.
are polyester, not epoxy. Page 1.13, last par.: This is a gross understatement of the current deficien-
Page 3.1.36. Paragraph on seismic loads. Third line in that paragraph.
Remove the word "explosions" relative to rock burst, and let the sentence
read ". . . . seismicity (earthquakes), rock bursts, and other phenomena."
Page 3.1.123. Fourth paragraph. Nonradioloical Accidents. A comon
fatal/nonfatal accident rate was used for surface construction activities
which seems reasonable. However, a common rate was also used for the underground
construction. This rate was derived from underground mining other
than coal. To be closer to the truth in this area, the accident rates for
more representative industries should be used. For the salt repository,
cies in the data base. Specific gaps in rock-property knowledge should be
Itemized. The interaction between waste and host rock is a major area of
deficiency and thus should not be passed off matter-of-factly. Other major
unresolved issues should be mentioned: shaft and borehole sealing technology;
development of adequate nondestructive in situ geophysical techniques; demon-
strations of adequate large-scale, in situ measurements of solute transport
phenomena (characterizations of sorption and other reactions and dispersion
coefficients, especially for far-field analyses); quantitative methods to
analyze and model ground-water flow and solute transport in fractured rocks;
development of adequate method to measure hydraulic properties of very-lowthe
accident statistics from salt mining and potash mining should be used. permeability rocks and fractured rocks; ability to predict geologic and
For granite and basalt, underground metal and nonmetal hardrock mining is
more appropriate, and for shale, use the coal mine accident statistics.
climatic processes.
Page 3.1.137. Line 7. This line contains the first mention of phosphates.
What is the tie-in with salt repositories that might be constructed?
Page 1.14, par. 1, last sentence: This is an overstatement; suggest striking
"assure" and substituting "will be used to provide high assurance."
Page 3.1.147. Second line from bottom, typo on sentence starting
"Such scenarios. " Sconsiderably
Page 1.14, par. 2: The data base for granite is rapidly approaching thatfor
salt, thanks to the recent work in Sweden, Canada, U.K., and U.S. We know
more about granite than basalt or shale.
Page 3.1.178. Fifth line from the bottom, typographical error on involves.
Page 4.27. Third dot item. Has ISF been defined prior to this use? The
ISF, intemediate scale facility, is defined on page 4.34.
This paragraph again understates the deficiency In the geologic data base.
It stresses media deficiencies and fails to mention inadequate technology