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Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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Fusion Science and Technology
Exelon files to deactivate the Byron reactors
Exelon on June 16 filed with grid operator PJM Interconnection to deactivate the two Byron reactors in Illinois. The move came one day after the Illinois Senate adjourned without reaching an agreement on a comprehensive energy package that would have provided nearly $700 million to keep Byron’s reactors, as well as Exelon’s Dresden and Braidwood nuclear power plants, in operation. (In August of 2020, Exelon announced that it would close the economically challenged Byron and Dresden facilities in the fall of 2021 without some form of state aid to provide compensation for their clean power.) The state’s House of Representatives also adjourned earlier this week without taking up the bill.
K. Nojiri, M. Sakamoto, K. Oki, M. Yoshikawa, Y. Nakashima, M. Yoshikawa, A. Terakado, R. Nohara, M. Mizuguchi, T. Imai, M. Ichimura
Fusion Science and Technology | Volume 68 | Number 1 | July 2015 | Pages 120-124
Technical Paper | Open Magnetic Systems 2014 | dx.doi.org/10.13182/FST14-893
Articles are hosted by Taylor and Francis Online.
In GAMMA 10/PDX, the relationship between electron density and temperature of the divertor simulation plasma in the divertor simulation experimental module (D-module) and the density of the upstream plasma has been studied. As the amount of gas (H2 and Ar) injected into the D-module increases, the line-averaged electron density (ne_WP) of the west plug plasma (i.e., upstream plasma) increases due to gas flow from the D-module to the upstream. The electron temperature of the divertor simulation plasma monotonically decreases with increase in ne_WP. The electron density of the divertor simulation plasma becomes saturated against increase in ne_WP when the plasma is sustained only by the ion cyclotron heating. This may suggest a sign of the beginning of the density roll-over. Additional electron cyclotron heating to the upstream plasma increases the density of both the upstream plasma and the divertor simulation plasma, and the saturated density of the divertor simulation plasma recovers to a linear dependence on ne_WP, suggesting an enhanced ionization of neutral gases in the upstream and the D-module.