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International High-Level Radioactive Waste Management Conference Breached Drip Shield Test and Validation of a TSPA Sub-Model.

DE2004808018

Publication Date	2004
Personal Author	Walton, Z. P.; Kam, J. T.
Page Count	12
Abstract	The Engineered Barrier System (EBS) represents the system of human engineered barriers in the isolation of high-level radioactive waste in the proposed repository at Yucca Mountain. It is designed to complement and enhance the natural barriers to isolate and prevent the transport of radionuclides into the surrounding environment. The transport mechanism most frequently postulated for radionuclides is liquid water flux that has penetrated the EBS through corrosion breaches in the drip shield and waste packages (WP). A water flux-splitting model is used to predict flow through WP and drip shield breaches and is documented in the EBS Radionuclide Transport Abstraction . The current version of the flux-splitting model is incapable of accounting for water that has been splashed from the impact location, the deviation of water paths (rivulets) from the axis of impact, and water loss due to evaporation. This paper will present the results of a series of breached drip shield tests used to collect empirical data for the initial validation and further development of the flux-splitting model. Additionally, this paper will present a comparison between numerical calculations used as a part of the flux-splitting model validation and calibration and a portion of the data collected from the breached drip shield test.
Keywords	High level radioactive wastes Radionuclides Fluid dynamics Meetings Tables (Data) Mathematical models Equations Yucca Mountain Liquid flow Drip shield Total system performance assessment (TSPA) Flux-splitting Model Engineered Barrier System (EBS) Waste packages (WP)
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Science and Engineering Associates, Inc., Santa Fe, NM.; Department of Energy, Washington, DC.; Bechtel Nevada Corp., Las Vegas.
Supplemental Notes	Prepared in cooperation with Bechtel Nevada Corp., Las Vegas. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200509

International High-Level Radioactive Waste Management Conference Breached Drip Shield Test and Validation of a TSPA Sub-Model.

International High-Level Radioactive Waste Management Conference Breached Drip Shield Test and Validation of a TSPA Sub-Model.
DE2004808018

Publication Date	2004
Personal Author	Walton, Z. P.; Kam, J. T.
Page Count	12
Abstract	The Engineered Barrier System (EBS) represents the system of human engineered barriers in the isolation of high-level radioactive waste in the proposed repository at Yucca Mountain. It is designed to complement and enhance the natural barriers to isolate and prevent the transport of radionuclides into the surrounding environment. The transport mechanism most frequently postulated for radionuclides is liquid water flux that has penetrated the EBS through corrosion breaches in the drip shield and waste packages (WP). A water flux-splitting model is used to predict flow through WP and drip shield breaches and is documented in the EBS Radionuclide Transport Abstraction . The current version of the flux-splitting model is incapable of accounting for water that has been splashed from the impact location, the deviation of water paths (rivulets) from the axis of impact, and water loss due to evaporation. This paper will present the results of a series of breached drip shield tests used to collect empirical data for the initial validation and further development of the flux-splitting model. Additionally, this paper will present a comparison between numerical calculations used as a part of the flux-splitting model validation and calibration and a portion of the data collected from the breached drip shield test.
Keywords	High level radioactive wastes Radionuclides Fluid dynamics Meetings Tables (Data) Mathematical models Equations Yucca Mountain Liquid flow Drip shield Total system performance assessment (TSPA) Flux-splitting Model Engineered Barrier System (EBS) Waste packages (WP)
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Science and Engineering Associates, Inc., Santa Fe, NM.; Department of Energy, Washington, DC.; Bechtel Nevada Corp., Las Vegas.
Supplemental Notes	Prepared in cooperation with Bechtel Nevada Corp., Las Vegas. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200509