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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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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.
B. Unterberg, U. Samm, M. Z. Tokar', A. M. Messiaen, J. Ongena, R. Jaspers
Fusion Science and Technology | Volume 47 | Number 2 | February 2005 | Pages 187-201
Technical Paper | TEXTOR: Radiation Cooling and Confinement | doi.org/10.13182/FST05-A699
Articles are hosted by Taylor and Francis Online.
The concept of a cold radiating plasma boundary has been proposed as a solution to the problem of power exhaust in magnetically confined fusion plasmas. We describe experiments to study the impact of the radiating impurities on transport processes in the plasma boundary and the plasma core in the tokamak TEXTOR.The injection of impurities (neon, silicon, or argon) leads to the formation of a radiating plasma boundary where up to 90% of the input power can be distributed to large wall areas, thereby strongly reducing the convective heat flux density onto the plasma-facing components. At high plasma densities the impurity seeding leads to a transition to an improved confinement state termed the radiative improved mode. This operational scenario combines high density and high confinement with power exhaust by radiation under quasi-stationary discharge conditions.The confinement improvement can be explained by a reduction of transport caused by the ion temperature gradient mode. This reduction is initiated by the impurity content and amplified by a characteristic steepening of the density profiles of the background plasma. The extrapolation of the results obtained in TEXTOR, based on experiments in larger devices, is discussed.