23.04.2013 Views

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

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

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

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

3-13<br />

Comment<br />

Comment Number<br />

Number<br />

.c.16 pp. 7.2.4, 7.3.16; DOE/ET-0028 For. Accident 7.6, the safety system is a failsafe wedge type braking<br />

"(Creep) is difficult to stablize in tunnel openings." system on the cage. What is the maximum allowable braking distance <strong>of</strong> the<br />

cage for the expected release?<br />

"From experiments....equations can be developed to describe the creep<br />

behavior<br />

behavior<br />

<strong>of</strong><br />

<strong>of</strong><br />

salt"<br />

3.c.19 Appendix 7A, DOE/ET-0028<br />

The tables in this Appendix present the mining and construction costs for<br />

Since equations have been developed which describe the behaviour <strong>of</strong> salt a repository and its support facilities (surface). Operating and decommis-<br />

a posteriori, the GEIS should discuss whether or not they can predict the sioning costs for a repository should also be given and taken into account<br />

behaviour <strong>of</strong> salt under thermomechanical loading conditions? in comparing the alternatives. The GEIS should consider all costs that<br />

will be incurred through repository closure.<br />

3.c.17 pp. 7.4.24/25; DOE/ET-0028<br />

Several potential occupational and environmental hazards are associatedc.20 Y/OWI/T-36<br />

with the ventilation design as described in DOE/ET-0028 and in Y/OWI/TM-36. TM-36 lacks supporting analyses for salt. For example:<br />

The following questions need to be considered:<br />

3-14<br />

Hydrology: Volume 21 "Ground Water Movement and Nuclide Transport"<br />

o What are the risks <strong>of</strong> escape <strong>of</strong> radionuclides via the fresh addresses granite, shale and'basalt - no salt. P<br />

airway as a consequence <strong>of</strong> a transportation accident underground?<br />

Thermomechanical: Volume 20 "Thermomechanical Stress Analysis and<br />

o How will the integrity <strong>of</strong> seals between fresh airways and storage Development <strong>of</strong> Thermal Loading Guidelines" addresses granite, shale<br />

rooms be maintained if closures <strong>of</strong> up to 2 feet are expected in a and basalt - nn salt.<br />

repository in salt?<br />

3.c.21 General Comment<br />

o What are the risks associated with backfilling and retrieval The problems associated with retrievability have not been adequately<br />

ati discussed in GEIS. The following are specific areas <strong>of</strong> concern regarding<br />

retrievability.<br />

o What measures will be taken to reduce respirable dust to acceptable<br />

concentrations? Note that mining in granite will have an associated 0 Occupational hazards associated with retrieval options. Depending<br />

health hazard due to the siliceous type <strong>of</strong> dust generated. What on the time delay between retrieval and emplacement operations<br />

are the expected health effects due to dust? and the geologic medium <strong>of</strong> the repository, some canisters may be<br />

corroded, damaged or stuck (due to deformation or spalling host<br />

3.c.18 p. 7.4.30, Table 7.4.11. DOE/ET-0028 medium) such that there will be a risk <strong>of</strong> exposure to the workers<br />

No estimate <strong>of</strong> occupational risk is included in the accident analyses nor involved in the retrieval operations. There could also be a<br />

is there any discussion <strong>of</strong> possible impacts on continued repository operation, risk <strong>of</strong> escape <strong>of</strong> radionuclides into the biosphere if the integrity<br />

repository closure or retrieval <strong>of</strong> waste already emplaced. For example <strong>of</strong> seals separating main airways from storage rooms have not<br />

what will such impacts be for accident 7.5 or 7.6.<br />

been maintained.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!