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Modeling of heat extraction from variably fractured porous media in Enhanced Geothermal Systems

Geothermics

Hadgu, Teklu H.; Kalinina, Elena A.; Lowry, Thomas S.

Modeling of heat extraction in Enhanced Geothermal Systems is presented. The study builds on recent studies on the use of directional wells to improve heat transfer between doublet injection and production wells. The current study focuses on the influence of fracture orientation on production temperature in deep low permeability geothermal systems, and the effects of directional drilling and separation distance between boreholes on heat extraction. The modeling results indicate that fracture orientation with respect to the well-pair plane has significant influence on reservoir thermal drawdown. The vertical well doublet is impacted significantly more than the horizontal well doublet.

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TYPE Journal Article YEAR 2016
ScopusOSTIDOI

Integrating management of spent nuclear fuel in the United States by consolidating storage

15th International High-Level Radioactive Waste Management Conference 2015, IHLRWM 2015

Rechard, Robert P.; Price, Laura L.; Kalinina, Elena A.; Bonano, Evaristo J.; Jenkins-Smith, Hank C.

The theme of the paper is that consolidated interim storage can provide an important integrating function between storage and disposal in the United States. Given the historical tension between consolidated interim storage and disposal in the United States, this paper articulates a rationale for consolidated interim storage. However, the paper concludes more effort could be expended on developing the societal aspects of the rationale, in addition to the technical and operational aspects of using consolidated interim storage.

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TYPE Conference Poster YEAR 2015
ScopusOSTI

Transportation of spent nuclear fuel from reactor sites in the US - What will it take?

15th International High-Level Radioactive Waste Management Conference 2015, IHLRWM 2015

Kalinina, Elena A.; Busch, Ingrid K.

The Department of Energy (DOE) is laying the groundwork for implementing the Administration's Strategy for the Management and Disposal of Used Nuclear Fuel and High-Level Radioactive Waste, which calls for a consent-based siting process. Potential destinations for an interim storage facility or repository have yet to be identified. The purpose of this study is to evaluate how planning for future transportation of spent nuclear fuel as part of a waste management system may be affected by different choices and strategies. The transportation system is modeled using TOM (Transportation Operations Model), a computer code developed at the Oak Ridge National Laboratory (ORNL). The simulations include scenarios with and without an interim storage facility (ISF) and employing different at-reactor management practices. Various operational start times for the ISF and repository were also considered. The results of the cost analysis provide Rough Order of Magnitude (ROM) capital, operational, and maintenance costs of the transportation system and the corresponding spending profiles as well as information regarding the size of the transportation fleet, distance traveled (consist and cask miles), and fuel age and burnup during the transportation. This study provides useful insights regarding the role of the transportation as an integral part of the waste management system.

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TYPE Conference Poster YEAR 2015
ScopusOSTI
Results 101–124 of 124
Results 101–124 of 124