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Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Constellation Energy’s earnings skyrocket as investors eye AI
Investor’s Business Daily reported May 10 that the first-quarter earnings of Constellation Energy, the largest operator of nuclear power plants in the United States, surged 858 percent to reach a share price of $2.78, partly as a result of promising expectations regarding demand for artificial intelligence data centers. The S&P 500 stock value of Constellation jumped 3.7 percent on May 8 to $208.
G. Santistevan, R. Bentley, D. Wells, A. Hutton, A. Stavola, S. Benson, K. Jordan, J. Gubeli, P. Degtiarenko, L. Dabill
Nuclear Science and Engineering | Volume 198 | Number 1 | January 2024 | Pages 167-173
Note | doi.org/10.1080/00295639.2023.2178232
Articles are hosted by Taylor and Francis Online.
Copper-67 is a radioisotope of interest for medical imaging and therapy as well as for understanding stellar and interstellar evolution pertaining to the formation of proton-rich nuclei. Since 67Cu decays 100% to 67Zn, understanding this reaction can shed light on the abundance of this and other p-nuclei elements in the universe. Here, the photonuclear production of 67Cu from 71Ga and natural gallium is examined as an alternative to its photoproduction from zinc. Two research and development production runs were performed at Thomas Jefferson National Accelerator Facility using an electron linac. During the first run, an 805-W, 30.9-MeV beam was used to irradiate a 1-mm tungsten radiator to create a bremsstrahlung flux. The resulting gamma photons irradiated 50.9 g of natural gallium encased in a graphite crucible for 24.2 h; 7.02 Bq/W∙s∙kg of 67Cu activity was produced. During the second run, a 4380-W, 31.5-MeV beam was used for 12.0 h on the same target containing 60 g of natural gallium; 6.41 Bq/W∙s∙kg of 67Cu activity was produced. Because of the difficulties in spectroscopically differentiating 67Cu from 67Ga, prior to each run, an isotopically pure 71Ga disk was irradiated using a 100-W beam for 1 h, at the same respective energies. These baseline irradiations allowed for separation of 67Cu from 67Ga in the spectroscopic measurements of the natural gallium targets.