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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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Latest News
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
Geoffrey W. Shuy, Ali E. Dabiri, Husam Gurol
Fusion Science and Technology | Volume 9 | Number 3 | May 1986 | Pages 459-475
Technical Paper | Fusion Reactors | doi.org/10.13182/FST86-A24732
Articles are hosted by Taylor and Francis Online.
A system of neutron-lean tandem mirror satellite reactors using the deuterium-3He (D-3He) fuel cycle has been assessed. The 3He fuel is produced via a breeder reactor, also based on the tandem mirror reactor (TMR) concept. The TMR concept was selected because, for the satellite reactors, the fusion energy is mostly in charged-particle form, so efficient, direct energy conversion can be used. For the breeder, the TMR gives a higher maximum achievable support ratio than other concepts give. The optimum satellite operating temperature was found to be ∼75 keV. The safety and cost of the satellite/breeder system were assessed. The D-3He fuel cycle becomes particularly attractive if the deuterium-deuterium (D-D) reaction can be suppressed by nuclear spin polarization. For perfect D-D reaction suppression, this would allow immediate hands-on maintainability of reactor components and allow for reduction in the magnet dimensions, since the shield would no longer be required. For no D-D reaction suppression, ∼3% of the fusion power will be in neutrons. This will then require the use of ∼40-cm shielding, along with activation concerns. Hands-on maintenance f or the satellite reactor is possible even without D-D reaction suppression, if low-activation materials are used. The radioactivity level of the 3He breeder is comparable to that of a deuterium-tritium reactor. The cost of electricity for the system, including the fuel costs, is estimated f or this system.