In-Drift Natural Convection and Condensation.

Nieder-Westermann, G. H.

Technical Information Center Oak Ridge Tennessee

关键词: Radioactive waste management;    Waste packaging;    License applications;    High-leve radioactivity;    Condensation;   

RP-ID  :  DE2006850421

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

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.