National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Thick Liquid-Walled Spheromak Magnetic Fusion Power Plant.

DE200515013478

Publication Date	2002
Personal Author	Moir, R. W.; Bulmer, R. H.; Fowler, T. K.; Rognlien, T. D.; Youssef, M. Z.
Page Count	46
Abstract	We assume a spheromak configuration can be made and sustained by a steady gun current, which injects particles, current and magnetic field, i.e. helicity injection. The equilibrium is calculated with an MHD equilibrium code, where an average beta of 10% is found. The toroidal current of 40 MA is sustained by an injection current of 100 kA (125 MW of gun power). The flux linking the gun is l/lOOO that of the flux in the spheromak. The geometry allows a flow of liquid, either molten salt, (flibe-Li2BeF4 or flinabeLiNaBeF4) or liquid metal such as SnLi which protects most of the walls and structures from neutron damage. The free surface between the liquid and the burning plasma is heated by bremsstrahlung and optical radiation and neutrons from the plasma. The temperature of the free surface of the liquid is calculated and then the evaporation rate is estimated. The impurity concentration in the burning plasma is estimated and limited to a 20% reduction in the fusion power. For a high radiating edge plasma, the divertor power density of 460 W / m 2 is handled by high-speed (20 m/s), liquid jets. For low radiating edge plasmas, the divertorpower density of 1860 MW/m2 is too high to handle for flibe but possibly acceptable for SnLi with jets of 100 m/s flow speed. Calculations show the tritium breeding is adequate with enriched Li and appropriate design of the walls not covered by flowing liquid 15% of the total. We have come up with a number of problem areas needing further study to make the design self consistent and workable.
Keywords	Spheromak devices Nuclear fusion Configuration Gun electrodes Gun current Gun injection systems Toroidal currents Magnetic fusion energy Liquid walls
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200601

Thick Liquid-Walled Spheromak Magnetic Fusion Power Plant.

Thick Liquid-Walled Spheromak Magnetic Fusion Power Plant.
DE200515013478

Publication Date	2002
Personal Author	Moir, R. W.; Bulmer, R. H.; Fowler, T. K.; Rognlien, T. D.; Youssef, M. Z.
Page Count	46
Abstract	We assume a spheromak configuration can be made and sustained by a steady gun current, which injects particles, current and magnetic field, i.e. helicity injection. The equilibrium is calculated with an MHD equilibrium code, where an average beta of 10% is found. The toroidal current of 40 MA is sustained by an injection current of 100 kA (125 MW of gun power). The flux linking the gun is l/lOOO that of the flux in the spheromak. The geometry allows a flow of liquid, either molten salt, (flibe-Li2BeF4 or flinabeLiNaBeF4) or liquid metal such as SnLi which protects most of the walls and structures from neutron damage. The free surface between the liquid and the burning plasma is heated by bremsstrahlung and optical radiation and neutrons from the plasma. The temperature of the free surface of the liquid is calculated and then the evaporation rate is estimated. The impurity concentration in the burning plasma is estimated and limited to a 20% reduction in the fusion power. For a high radiating edge plasma, the divertor power density of 460 W / m 2 is handled by high-speed (20 m/s), liquid jets. For low radiating edge plasmas, the divertorpower density of 1860 MW/m2 is too high to handle for flibe but possibly acceptable for SnLi with jets of 100 m/s flow speed. Calculations show the tritium breeding is adequate with enriched Li and appropriate design of the walls not covered by flowing liquid 15% of the total. We have come up with a number of problem areas needing further study to make the design self consistent and workable.
Keywords	Spheromak devices Nuclear fusion Configuration Gun electrodes Gun current Gun injection systems Toroidal currents Magnetic fusion energy Liquid walls
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200601