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Title: Computational Fluid Dynamics Model for Saltstone Vault 4 Vapor Sapce

Abstract

Computational fluid dynamics (CFD) methods have been used to estimate the flow patterns for vapor space inside the Saltstone Vault No.4 under different operating scenarios. The purpose of this work is to examine the gas motions inside the vapor space under the current vault configurations. A CFD model took three-dimensional transient momentum-energy coupled approach for the vapor space domain of the vault. The modeling calculations were based on prototypic vault geometry and expected normal operating conditions as defined by Waste Solidification Engineering. The modeling analysis was focused on the air flow patterns near the ventilated corner zones of the vapor space inside the Saltstone vault. The turbulence behavior and natural convection mechanism used in the present model were benchmarked against the literature information and theoretical results. The verified model was applied to the Saltstone vault geometry for the transient assessment of the air flow patterns inside the vapor space of the vault region using the boundary conditions as provided by the customer. The present model considered two cases for the estimations of the flow patterns within the vapor space. One is the reference baseline case. The other is for the negative temperature gradient between the roof inner and top groutmore » surface temperatures intended for the potential bounding condition. The flow patterns of the vapor space calculated by the CFD model demonstrate that the ambient air comes into the vapor space of the vault through the lower-end ventilation hole, and it gets heated up by the Benard-cell type circulation before leaving the vault via the higher-end ventilation hole. The calculated results are consistent with the literature information.« less

Authors:
Publication Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC
Sponsoring Org.:
USDOE
OSTI Identifier:
881442
Report Number(s):
WSRC-TR-2005-00288
TRN: US0603088
DOE Contract Number:  
DE-AC09-96SR18500
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; AIR FLOW; NATURAL CONVECTION; TEMPERATURE GRADIENTS; TURBULENCE; VENTILATION; FLUID MECHANICS; FLOW MODELS; STORAGE FACILITIES; RADIOACTIVE WASTE STORAGE; SAVANNAH RIVER PLANT

Citation Formats

Lee, Si Young. Computational Fluid Dynamics Model for Saltstone Vault 4 Vapor Sapce. United States: N. p., 2005. Web. doi:10.2172/881442.
Lee, Si Young. Computational Fluid Dynamics Model for Saltstone Vault 4 Vapor Sapce. United States. doi:10.2172/881442.
Lee, Si Young. Mon . "Computational Fluid Dynamics Model for Saltstone Vault 4 Vapor Sapce". United States. doi:10.2172/881442. https://www.osti.gov/servlets/purl/881442.
@article{osti_881442,
title = {Computational Fluid Dynamics Model for Saltstone Vault 4 Vapor Sapce},
author = {Lee, Si Young},
abstractNote = {Computational fluid dynamics (CFD) methods have been used to estimate the flow patterns for vapor space inside the Saltstone Vault No.4 under different operating scenarios. The purpose of this work is to examine the gas motions inside the vapor space under the current vault configurations. A CFD model took three-dimensional transient momentum-energy coupled approach for the vapor space domain of the vault. The modeling calculations were based on prototypic vault geometry and expected normal operating conditions as defined by Waste Solidification Engineering. The modeling analysis was focused on the air flow patterns near the ventilated corner zones of the vapor space inside the Saltstone vault. The turbulence behavior and natural convection mechanism used in the present model were benchmarked against the literature information and theoretical results. The verified model was applied to the Saltstone vault geometry for the transient assessment of the air flow patterns inside the vapor space of the vault region using the boundary conditions as provided by the customer. The present model considered two cases for the estimations of the flow patterns within the vapor space. One is the reference baseline case. The other is for the negative temperature gradient between the roof inner and top grout surface temperatures intended for the potential bounding condition. The flow patterns of the vapor space calculated by the CFD model demonstrate that the ambient air comes into the vapor space of the vault through the lower-end ventilation hole, and it gets heated up by the Benard-cell type circulation before leaving the vault via the higher-end ventilation hole. The calculated results are consistent with the literature information.},
doi = {10.2172/881442},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {6}
}

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