Thermal management with ventilation

Danko, G.; Buscheck,; Nitao, John J.; Saterlie, S.F.

doi:10.2172/201544

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Development aspects (Danko et al, 1995(Danko et al, , 1996 User's manual (Mine Ventilation Services, 1986); maintained by Mine Ventilation Services, Inc.…”

Section: ~~ ~~~~mentioning

confidence: 99%

Site characterization progress report: Yucca Mountain, Nevada. Number 15, April 1--September 30, 1996

1997

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DISTRIBUTION OF THIS DOCUMENT I S URPklMtm Washington, DC 20585 A p r i l 2 3 , 1997 NOTE TO READERS:During this reporting period, we released our revised Program Plan which outlines a focused, integrated program that will achieve key Program and statutory objectives. The plan identifies three near-term objectives: (1) updating in 1997 the regulatory framework for repository site characterization, (2) supporting a 1998 viability assessment, and (3) if the site is suitable, submitting a Secretarial site recommendation to the President in 2001 and a license application to the Nuclear Regulatory Commission in 2002. In support of the first near-term objective, we drafted a Notice of Proposed Rulemaking to amend the repository siting process. This notice was subsequently published in the Federal Register on December 16, 1996, which began a 60-day public comment period. Subsequent notices extended the comment period to May 16, 1997.Tunneling was completed in the Exploratory Studies Facility main drift, and the tunnel boring machine continued tunneling up the south ramp. In December 1996, we encountered worse ground conditions than expected, but even with these poor ground conditions, the tunnel boring machine reached the south portal on April 25,1997. The completion of the main drift marks a shift in emphasis from constructing the Exploratory Studies Facility to conducting scientific experiments in the tunnel and alcoves.The initial construction phase of the Thermal Testing Facility was completed and the first phase of the in situ heater tests began on schedule in August 1996. This eighteen month test will measure thermal effects on the rock and the moisture within the rock.Most of our site investigations and design and performance assessment activities this period were directed toward providing information for the 1998 viability assessment, our second near-term objective. Several studies and modeling activities were completed that provided new information on the potential percolation flux in the repository horizon. The new information indicated the potential for preferential water pathways and for a percolation flux higher than previously indicated.During the next period, we will continue modeling, testing, and data collection activities to reduce the uncertainty in the range of percolation flux that can be expected i? the repository horizon. In the Note to Readers for the 14th Progress Report, we indicated that we expected to issue the revised Waste Containment and Isolation Strategy during the first half of 1997. We will re-evaluate issuance of the strategy as a consequence of any changes to the predicted range c,f percolation flux rates. In addition, we will reassess the results from our on-going repository design and performance activities discussed in this progress report in light of the these same changes. 4-15Design Activity 1.1 1.3. PROGRESS REPORT #15 EXECUTIVE SUMMARYDuring the second half of fiscal year 1996, activities at the Yucca Mountain Site Characterization Proj...

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“…Development aspects (Danko et al, 1995(Danko et al, , 1996 User's manual (Mine Ventilation Services, 1986); maintained by Mine Ventilation Services, Inc.…”

Section: ~~ ~~~~mentioning

confidence: 99%

Site characterization progress report: Yucca Mountain, Nevada. Number 15, April 1--September 30, 1996

1997

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“…Pre-dosure ventilation has the potential to enhance repository performance in four ways. It can (1) reduce peak and average near-field temperatures due to sensible and latent heat removal, (2) reduce temperature variations between hot and cold spots along emplacement drifts, (3) reduce relative humidity around the waste packages (WPs) due to air dilution and rock dryout, and (4) delay the return of water to the near-field due to reduced rock moisture content. This paper analyzes the results of ventilation studies conducted by the University of Nevada for the CRWMS M&O Contractor1' and the Nuclear Waste Technical Review Board5.…”

Section: Introductionmentioning

confidence: 99%