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

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15<br />

shaft and borehole sealing; large-scale sorption measurements; long-term Page 3:1.39, par. 3, line 3: Substitute minimal for "no" after "transport<br />

verification <strong>of</strong> models; large-scale dispersivity measurements; and other pathways."<br />

deficiencies.<br />

Page 3.1.39, par. 3, line 4: Substitute "increase flow <strong>of</strong>" for "introduce<br />

Page 3.1.27, par. 2, line 5: The large increase in volume <strong>of</strong> gypsum from owng" after "changes could.e fow <strong>of</strong>" for "ntroduce<br />

anhydrite could cause detrimental stresses in a repository; thisshould be<br />

mentioned. Page 3.1.39, par. 3, line 5: Insert "and through" after "ground water to."<br />

Page 3.1.28, par. 1: Because <strong>of</strong> the great public concern over hazards <strong>of</strong>ubstute shou for "w after c medium.<br />

radioactive waste from comnercial nuclear power reactors, we believe that Page 3.1.41, par. 5: Interception <strong>of</strong> an aqulferwould certainly violate<br />

considerable. effort would be justified toward the objective <strong>of</strong> translating repository criteria and would preclude the option <strong>of</strong> backfilling emplaced<br />

levels <strong>of</strong> radioactivity <strong>of</strong> the waste into terms that are readily understand- waste.<br />

able to the public, and that facilitate a comparison with naturally radioactive<br />

materials or with natural sources <strong>of</strong> radioactivity. In the present Page 3.1.44: Somewhere in section 3.1 a discussion should be ncluded on the<br />

statement, considerable effort appears to have been made in accomplishing present problems and uncertainties <strong>of</strong> long-term bnrehole, shaft, and tunnel<br />

this type <strong>of</strong> comparison in the area <strong>of</strong> routine and accidental exposures to backfill and sealing technology. If the shafts and disturbed zones around<br />

radioactivity from artificial sources such as radioactive waste by comparison them are not adequately sealed for the time required, they would act as a<br />

with natural sources such as the earth, the cosmos, and the human body. dangerous short circuit from the reposit teo the biosphere.<br />

However, it would be helpful to make similar comparisons between the radio-ry to the bosphere.<br />

activity <strong>of</strong> the disposed waste (for example, as permanently buried in a Page 3.1.47, par. 3, lines 2-3: Hydrology should also be a prime considergeologic<br />

repository) and the radioactivity <strong>of</strong> various typical uranium ore ation in geologic site selection.<br />

deposits, at various times after disposal <strong>of</strong> the waste. The brief discussion<br />

here (p. 3.1.28) is not in sufficient detail to be useful in evaluating prob- Page 3.1.47, last par: The possible value <strong>of</strong> spent fuel as a resource should<br />

able consequences <strong>of</strong> drilling into buried waste canisters at various future also be mentioned for consideration.<br />

dates by comparison with drilling into typical uranium ore deposits.<br />

Page 3.1.48, par. 1, line 5: Insert "and to provide as long a pathway to n<br />

Page3.1.29, par. 3, line 4: Insert "and hydraulic head gradient" after the surface as feasible" after "surface phenomena." Ul<br />

0mass."<br />

Page 3.1.48, last par., last sentence: This sentence is an overstatement.<br />

Pages 3.1.29, par. 3, last 4 lines: The Inflow <strong>of</strong> such high quantities <strong>of</strong> We do not have adequate, accepted techniques for testing fractured rocks or<br />

ground water would probably disqualify the site. rocks with extremely low permeabilities or high degrees <strong>of</strong> anisotropy and<br />

heterogeneity. We are especially lacking in nondestructive field techniques<br />

Page 3.1.29, last par., last line: After last sentence insert "However, (those which do not require a lot <strong>of</strong> wells directly n the repository areas).<br />

there would be wide variation in these spacings from place to place."<br />

Page 3.1.49, par. 2, sentence 1: Add transmissivity, storage coefficients,<br />

Page 3.1.32, par. 2, line 2: Insert "per unit head gradient" after "unit boundary conditions, and porosity to list <strong>of</strong> factors needed.<br />

time."<br />

Page 3.1.49, par. 2, line 3: Substitute "available" for "one <strong>of</strong> several"<br />

Page 3.1.29, par. 2. lines 6-9: It seems highly unlikely that criteria would after "From."<br />

allow a repository in an area with such high ground-water inflow.<br />

Page 3.1.49, par. 3, lIne 1: Substitute "very low" for "low to no" after<br />

Page 3.1.29, par. 4: At end <strong>of</strong> paragraph, insert "However, studies in Sweden, "The areas <strong>of</strong>." Every place has some ground water.<br />

Great Britain, and Canada indicate that considerable fracturing can be found<br />

in granites at postulated repository depths." Page 3.1.49, par. 3, lines 6-8: Laboratory methods are not satisfactory for<br />

measurement <strong>of</strong> in sltu hydraulic parameters In any type <strong>of</strong> media (especially<br />

Page 3.1.29, par. 6, lines 3-4: The questions <strong>of</strong> shaft and borehole plugging fractured). This section should be deleted.<br />

apply to all media, not just salt.<br />

Page 3.1.35, par. 1: It should be mentioned that heat sources in salt draw<br />

water toward them.<br />

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