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Fusion Research Center

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Author: Mandrekas, John × Author: Stacey, Weston M. × End date: 2004 × Start date: 2003 × Item Type: Publication × Has files: Yes ×

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2004 Annual Report Fusion Research Center, Georgia Institute of Technology [Title page]

2004-10 , Stacey, Weston M. , Mandrekas, John

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Extensions of the TEP Neutral Transport Methodology

2004-04 , Stacey, Weston M. , Zhang, Dingkang , Mandrekas, John

Recent extensions of the Transmission and Escape Probability methodology and its implementation in the 2-D neutral transport code GTNEUT are presented. These extensions address the issues of anisotropy of the neutral distribution function at the interfaces and the non-uniformity of the first collision source in short mean free path regions. Comparisons with Monte Carlo for a number of model problems are discussed.

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Theory, Analysis and Code Development

2003-12 , Stacey, Weston M. , Mandrekas, John , Zhang, Dingkang , Umansky, Maxim V. , Rognlien, Thomas D.

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Next-Step Option Physics (Grant ER54350)

2004-10 , Stacey, Weston M. , Mandrekas, John , Hoffman, E. A. (Elisha Albright)

For more than a decade we have been involved in physics and design analysis of possible nextstep tokamak options, including first ITER, later FIRE and most recently a tokamak neutron source for a near-term transmutation reactor for burning the transuranics in spent nuclear fuel. We have also recently supported the National Transport Code Coordination activity under this grant. In recent years, much of the effort has been devoted to defining the physics and performance characteristics required of a tokamak fusion neutron source that could drive a sub-critical reactor for the transmutation of the transuranics in spent nuclear fuel. This document provides a final report for the activity in each of these areas for the last grant period.

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A Superconducting Tokamak Fusion Transmutation of Waste Reactor

2004-01 , Stacey, Weston M. , Mauer, A. N. , Mandrekas, John , Hoffman, E. A. (Elisha Albright)

We are developing a Fusion Transmutation of Waste Reactor (FTWR) concept—a sub-critical, metal fuel, liquid metal cooled fast reactor driven by a tokamak DT fusion neutron source. An emphasis is placed on using nuclear, separation/processing and fusion technologies that either exist or are at an advanced state of development and on using plasma physics parameters that are supported by the existing database. We have previously discussed the general capabilities of DT tokamak neutron sources for driving transmutation reactors [1] and developed a design concept for a FTWR [2] based on normal conducting magnets. The concept has been further developed in papers dealing with nuclear design and safety [3] and with the evaluation of the potential impact on radioactive waste management [4]. The purpose of this paper is to examine how the FTWR design concept would change if superconducting magnets were used.

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Next-step option design studies (DOE GRANT ER54350)

2003-12 , Stacey, Weston M. , Mandrekas, John

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Collaborative Analysis of DIII-D (DoE Grant ER54538)

2004-10 , Stacey, Weston M. , Mandrekas, John

The collaboration of the Georgia Tech Fusion Research Center in the analysis and interpretation of DIII-D experiments as part of the national DIII-D Team began in 1998 under support from General Atomics and has continued since 1999 under support of DoE OFES (Grant DE-FG02-ER54538). This analysis and interpretation of DIII-D experiments has been closely integrated with the ongoing, internally supported code and theory development in the Georgia Tech Fusion Research Center, and results of both efforts are discussed in this section without distinction. The principal areas of experimental analysis and interpretation have been: 1) the physics of the edge pedestal; 2) density limits caused by thermal instabilities in the plasma edge; 3) plasma rotation; 4) neutral atom fueling and recycling in the plasma edge; and 5) impurity transport in general and the radiating mantle in particular.

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Analysis of DIII-D Experiments (DOE GRANT ER54538)

2003-12 , Stacey, Weston M. , Mandrekas, John , Groebner, Rich J. , Petrie, Thomas W. , Colchin, Richard J.

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