Results 221 to 230 of about 79,655 (259)

Evaluation of radiation shielding, nuclear heating and dose rate for JT-60 superconducting modification

Fusion Engineering and Design, 2002
Abstract The radiation shielding, nuclear heating and dose rate have been evaluated for JT-60 superconducting modification. The double-walled structure of a vacuum vessel was adopted so that the maximum nuclear heating at the inboard side of the superconducting TF coil could be suppressed to be lower than 2.5 mW/cm3.
A. Morioka, A. Sakasai, K. Masaki, S. Ishida, N. Miya, M. Matsukawa, A. Kaminaga, A. Oikawa   +7 more
openaire   +1 more source

The Nuclear Physics Uncertainty on Kilonova Heating Rates and the Role of Fission

2019
The detection of an electromagnetic counterpart to GW170817 suggests that r-process elements are produced in neutron star mergers. This electromagnetic counterpart has been modeled as a kilonova, which is a light curve thought to be powered mainly from the radioactive decay of heavy elements formed.
Y. L. Zhu, T. Sprouse, M. R. Mumpower, N. Vassh, R. Surman, G. C. McLaughlin   +5 more
openaire   +1 more source

Study of New Core Design for Typical Nuclear Research Reactor to Enhance the Heat Transfer Rate

Journal of Nuclear Energy Science & Power Generation Technology, 2015
Rough surfaces have been used as a tool to enhance heat transfer by increasing the level of turbulence mixing in the flow. In numerically simulating such flows. The main purpose of the present work is to increase the production of Mo-99 from a typical MTR nuclear research reactor by improving the thermal hydraulic properties in the reactor core.
Said MA Ibrahim Hesham F, Elbakhshawangy Mohammed GA   +1 more
openaire   +1 more source

Enhanced Condenser Tubes in a Nuclear Power Plant for Heat Rate Improvement

Heat Transfer Engineering, 2011
Analysis was performed to determine the performance and economic benefits of using enhanced condenser tubes in an existing nuclear plant. This work consisted of using measured heat transfer and friction performance of two enhanced tube geometries to calculate the resulting reduction of condenser saturation temperature.
openaire   +1 more source

Measurement of nuclear reactor local heat rates by optical fiber infrared emission

Optical Engineering, 1997
Gamma thermometers have been in routine use in nuclear power plants for power distribution monitoring for more than 35 years. These instruments depend upon the heating of a metal block by gamma rays. The generated heat is proportional to the specific power of nearby fuel rods.
openaire   +1 more source

On the Calculation of the Distribution of Heat Liberation Rates in Nuclear Reactor Components,

1955
Abstract : Knowledge of local heating rates is needed for estimation of operating temperatures, thermal stresses, and cooling requirements in nuclear reactor components. Heat is liberated by the dissipation of the energy of fission fragments, beta particles, fast neutrons, and gamma photons.
openaire   +1 more source

IGF-I slightly improves nuclear maturation and cleavage rate of bovine oocytes exposed to acute heat shockin vitro

Zygote, 2014
SummaryAnin vitromodel of embryo production was used to examine the effects of insulin-like growth factor (IGF)-I on maturation and developmental competence of oocytes exposed to heat shock. Cumulus–oocyte complexes were matured at 38.5°C or exposed to acute heat shock (HS; 41.5°C), with or without 100 ng/ml IGF-I, for 22 h throughin vitromaturation ...
Qi, Meiyu, Di, Liu, Zvi, Roth
openaire   +2 more sources

Fermi Level Density of States in AgAu Alloys. Nuclear Magnetic Spin‐Lattice Relaxation Rate and Low‐Temperature Specific Heat

physica status solidi (b), 1989
AbstractThe electronic structure of AgAu alloys is studied using LMTO self‐consistent band structure calculations. Both, the total and partial density of states as function of Au‐content at the Fermi level are presented. Some results of band structure calculations are analysed using a simple cluster model, which reveals that the behaviour of the ...
K. Kokko, E. Ojala, K. Mansikka
openaire   +1 more source

3D assessment of nuclear heating, dose rate, and structural damage in the generic ITER diagnostics upper port plugs and adjacent magnet coils

Fusion Engineering and Design, 2010
Abstract The USITER Project is responsible for providing a generic design of 18 diagnostics upper port plugs (UPPs). These plugs are designed to provide effective nuclear shielding, adequate nuclear heat removal capability, and allowance for personnel accessibility shortly after shutdown. In addition, the design limits for other parameters should not
Mahmoud Z. Youssef, Russell Feder
openaire   +1 more source

Evolution of stochastic chemical rate theory from the dynamics of molecular reactant and product nuclear modes coupled to a continuous manifold of heat bath oscillators

Chemical Physics, 1989
Abstract The Fokker-Planck equation for the system population in potential wells which represent reactants and products of chemical processes in solution, is most frequently taken as the starting point for stochastic approaches to chemical rate theory.
A.A. Belousov, A.M. Kuznetsov, J. Ulstrup   +2 more
openaire   +1 more source