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2024 ANS Annual Conference
June 16–19, 2024
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Fusion Science and Technology
Latest News
Former Exelon CEO Chris Crane remembered for “transformational milestones”
Crane
Exelon announced that Chris Crane, the company’s former chief executive, passed away on Saturday in Chicago at the age of 65.
Crane served as the company’s president and CEO from 2012 until his retirement in December 2022. During his tenure, he steered the energy company through several transformational milestones, including the successful mergers with Constellation Energy in 2012 and Pepco Holdings in 2016, creating the largest utility business by customer count in the United States.
In 2022, with the spin-off of Constellation as the generation and retail side of energy business (with the largest U.S. nuclear fleet), Crane led the creation of a stand-alone transmission and delivery energy company.
J. D. Galambos, Y-K. M. Peng, R. L. Reid, M. S. Lubell, L. Dresner, J. R. Miller
Fusion Science and Technology | Volume 15 | Number 2 | March 1989 | Pages 1046-1050
Magnet Engineering, Design and Experiments — II | doi.org/10.13182/FST89-A39830
Articles are hosted by Taylor and Francis Online.
The TETRA tokamak systems code is used to compare designs for the International Thermonuclear Experimental Reactor (ITER) that use Nb3Sn and NbTi superconductor magnets. Similar minimum-cost devices are found with both types of conductors when superfluid helium (He-II) is used in conjunction with the NbTi. The cost of using NbTi with He-I cooling is much higher than that of using Nb3Sn or NbTi with He-II cooling. Generally, the minimum-cost devices occur for peak fields at the toroidal field coil of about 11.5–13 T, depending on the physics requirements. Sensitivities to the allowable stress level indicate strong cost increases when the stress is reduced from the nominal 600-MPa level and weaker cost benefits when the stress is allowed to reach higher levels.