Ventilation Model and Analysis Report

Technical Report · Fri Jul 18 00:00:00 EDT 2003

DOI:https://doi.org/10.2172/836532· OSTI ID:836532

Chipman, V

This model and analysis report develops, validates, and implements a conceptual model for heat transfer in and around a ventilated emplacement drift. This conceptual model includes thermal radiation between the waste package and the drift wall, convection from the waste package and drift wall surfaces into the flowing air, and conduction in the surrounding host rock. These heat transfer processes are coupled and vary both temporally and spatially, so numerical and analytical methods are used to implement the mathematical equations which describe the conceptual model. These numerical and analytical methods predict the transient response of the system, at the drift scale, in terms of spatially varying temperatures and ventilation efficiencies. The ventilation efficiency describes the effectiveness of the ventilation process in removing radionuclide decay heat from the drift environment. An alternative conceptual model is also developed which evaluates the influence of water and water vapor mass transport on the ventilation efficiency. These effects are described using analytical methods which bound the contribution of latent heat to the system, quantify the effects of varying degrees of host rock saturation (and hence host rock thermal conductivity) on the ventilation efficiency, and evaluate the effects of vapor and enhanced vapor diffusion on the host rock thermal conductivity.

• Research Organization: Yucca Mountain Project, Las Vegas, NV (United States)
• Sponsoring Organization: US Department of Energy (US)
• OSTI ID: 836532
• Report Number(s): ANL-EBS-MD-000030, Rev. 03; DOC.20030723.0002, DC36099; TRN: US0500917
• Resource Relation: Other Information: PBD: 18 Jul 2003
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
CONVECTION
DIFFUSION
HEAT TRANSFER
POSITIONING
RADIOISOTOPES
SATURATION
THERMAL CONDUCTIVITY
THERMAL RADIATION
VENTILATION
WATER VAPOR
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTE DISPOSAL
FLOW MODELS
VALIDATION
RESERVOIR ROCK