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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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ANS Student Conference 2025
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Albuquerque, NM|The University of New Mexico
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Fusion Science and Technology
Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
A. Kumar, M.A. Abdou, M.Z. Youssef, Y. Ikeda, C. Konno, Y. Oyama, K. Kosako, F. Maekawa, H. Maekawa
Fusion Science and Technology | Volume 21 | Number 3 | May 1992 | Pages 2180-2189
Blanket Shield and Neutronic | doi.org/10.13182/FST92-A30043
Articles are hosted by Taylor and Francis Online.
Measurements of long-lived radioactivity are required to generate reliable data-base for qualifying fusion materials for reactor applications. However, long half lives necessitate intense 14 MeV neutron source, long irradiation time, long cooling time, and long counting time under low background. A 32h12m long irradiation, at mean source neutron intensity of 1.13 × 1012 n/s, was carried out on a number of foil packages kept near rotating neutron taiget source at FNS under USDOE/JAERI collaborative program in June 1989. Four identical foil packages were kept at 0, 45, 90, and ∼115 degrees to the d+ beam. Each package contained foils of Ag, Al, Dy, Hf, 151Eu, 153Eu, Hf, Ho, Ir, Mo, Re, Tb, and W. The objective was to measure decay γ radioactivity from 108mAg, 26Al, 158Tb, 152Eu, 150Eu, 94Nb, 186mRe, 178m2Hf, 192mIr, and 166mHo, among others. The half lives of these products range from 13.3y (152Eu) to 0.72My (26Al). These foils were interspersed with dosimetric foils of Nb and Zr. An estimated average fluence of ∼0.83 × 1015 n/cm2 (range: 0.47–1.65.1015 n/cm2) was obtained for the foil-package at zero degree. After cooling times ranging from 1.3 to 2 years, γ-spectroscopy of some of these foils has been completed. Analysis of measurements, done on foil package at zero degree, has been carried out using four radioactivity codes, REAC-2, DKRICF, ACT4 (THIDA-2), and RACC. REAC-2 is the only code that has data for most of the observed products; RACC has data for Al, Mo and W products only. Ratio of computed to experimentally measured activities varies from 4.10−5 to 377. Major update of all four cross-section libraries is recommended as waste classification of many fusion specific materials is likely to change dramatically.
