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In-Drift Natural Convection and Condensation.

DE2006850421

Publication Date	2005
Personal Author	Nieder-Westermann, G. H.
Page Count	16
Abstract	The in-drift condensation and convection model uses qualified data obtained from project information i.e. data tracking numbers (DTNs) and IEDs as presented in Section 4.1 of this report. The intended use of the model results is to provide reasonable, parametrically bounding estimates for drift-wall condensation occurrence frequency and rate for use in Total System Performance Assessment Model/Analysis for License Application. The probability of condensation at a particular waste package location is described by a correlation function between occurrence and the local percolation flux. For locations at which condensation occurs, the condensation rate is described by another correlation function between rate and local percolation flux. Four equally weighted cases are used in TSPA, corresponding to the possible combinations of high- and low-invert transport, and high- and low-dispersion (Section 8.3.1.1). For each of the four cases, separate correlations are developed for commercial spent nuclear fuel (CSNF) and HLW waste packages (except where no condensation is predicted; see Appendix H). The drift wall condensation rate (which may be zero) is added to the seepage rate (which may be zero) to form the advective flow rate in the EBS flow model.
Keywords	Radioactive waste management Waste packaging License applications High-leve radioactivity Condensation Convection Spent nuclear fuels Spent fuels In-drift condensation and convection model Parametrically bounding estimates Administrative change notices
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Department of Energy, Las Vegas, NV. Yucca Mountain Site Characterization Project Office.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200614

In-Drift Natural Convection and Condensation.

In-Drift Natural Convection and Condensation.
DE2006850421

Publication Date	2005
Personal Author	Nieder-Westermann, G. H.
Page Count	16
Abstract	The in-drift condensation and convection model uses qualified data obtained from project information i.e. data tracking numbers (DTNs) and IEDs as presented in Section 4.1 of this report. The intended use of the model results is to provide reasonable, parametrically bounding estimates for drift-wall condensation occurrence frequency and rate for use in Total System Performance Assessment Model/Analysis for License Application. The probability of condensation at a particular waste package location is described by a correlation function between occurrence and the local percolation flux. For locations at which condensation occurs, the condensation rate is described by another correlation function between rate and local percolation flux. Four equally weighted cases are used in TSPA, corresponding to the possible combinations of high- and low-invert transport, and high- and low-dispersion (Section 8.3.1.1). For each of the four cases, separate correlations are developed for commercial spent nuclear fuel (CSNF) and HLW waste packages (except where no condensation is predicted; see Appendix H). The drift wall condensation rate (which may be zero) is added to the seepage rate (which may be zero) to form the advective flow rate in the EBS flow model.
Keywords	Radioactive waste management Waste packaging License applications High-leve radioactivity Condensation Convection Spent nuclear fuels Spent fuels In-drift condensation and convection model Parametrically bounding estimates Administrative change notices
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Department of Energy, Las Vegas, NV. Yucca Mountain Site Characterization Project Office.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200614