scholarly journals EXPERIMENTAL STUDIES OF TRANSIENT EFFECTS IN FAST REACTOR FUELS. SERIES I. UO$sub 2$ IRRADIATIONS

1962 ◽  
Author(s):  
J.H. Field
Keyword(s):  
Fast Reactor ◽  
Experimental Studies ◽  
Transient Effects

Prompt Transient Heat Transfer Effects in Low-Fluence Laser Induced Incandescence

2012 ◽  
Author(s):  
F. Memarian ◽  
K. J. Daun
Keyword(s):  
Experimental Studies ◽  
Direct Simulation Monte Carlo ◽  
Recent Time ◽  
Direct Simulation ◽  
Transient Effects ◽  
Time Resolved ◽  
Laser Induced Incandescence ◽  
Simulation Monte Carlo ◽  
Heat Transfer Effects ◽  
Particle Cooling

Recent time-resolved laser-induced incandescence (TiRe-LII) experimental studies have revealed anomalies in particle cooling rates that cannot be explained using steady-state conduction models. This is the first study to use Direct Simulation Monte Carlo (DSMC) to investigate possible transient effects in heat conduction between the laser-energized particle and surrounding gas. While the DSMC results reveal an increased cooling rate shortly after the laser pulse, this effect is small relative to experimentally-observed anomalous cooling.

Experimental studies of heat exchange for sodium boiling in the fuel assembly model: Safety substantiation of a promising fast reactor

2017 ◽  
Vol 64 (1) ◽  
pp. 6-14 ◽  
Author(s):  
R. R. Khafizov ◽  
V. M. Poplavskii ◽  
V. I. Rachkov ◽  
A. P. Sorokin ◽  
A. A. Trufanov ◽  
...  
Keyword(s):  
Heat Exchange ◽  
Fuel Assembly ◽  
Fast Reactor ◽  
Experimental Studies ◽  
Assembly Model

scholarly journals E203 Experimental Studies of Natural Circulation Decay Heat Removal in Japan Sodium Cooled Fast Reactor (JSFR)

2009 ◽  
Vol 2009.14 (0) ◽  
pp. 427-428
Author(s):  
Hideki KAMIDE ◽  
Hiroyuki MIYAKOSHI ◽  
Osamu WATANABE ◽  
Yuzuru EGUCHI ◽  
Tomonari KOGA
Keyword(s):  
Fast Reactor ◽  
Natural Circulation ◽  
Experimental Studies ◽  
Heat Removal ◽  
Decay Heat

Temporal Modulation of Electroosmotic Micropumps

2006 ◽  
Author(s):  
Daniel J. Laser
Keyword(s):  
Duty Cycle ◽  
Electroosmotic Flow ◽  
Practical Importance ◽  
Experimental Studies ◽  
Lateral Diffusion ◽  
Zero Field ◽  
Parallel Plates ◽  
Transient Effects ◽  
Square Wave ◽  
Capillary Array

This paper reports on analytical and experimental studies of transient effects in electroosmotic (EO) micropumps, focusing on an EO micropump operational paradigm of practical importance: the use of variable-duty-cycle square wave driving voltages. Models of transient effects in EO micropumps are evaluated and developed, and load inertia as well as thermal and diffusion effects are considered. Detailed models, based on solutions for electroosmotic flow between infinite parallel plates, are presented for slit capillary array EO micropumps with slit half-width on the order of one micron. Driving typical microfluidic system loads, analysis by analogy to Stokes' second problem predicts pseudosteady electroosmotic flow in these micropumps for input frequencies up to 100 Hz, with attenuation of high-frequency components of square-wave inputs due to load inertial effects. In experiments with slit capillary array electroosmotic micropumps driven by 10 Hz square waves, micropump output is observed to be generally nonlinear with duty cycle, with significant flow rate enhancement relative to constant-voltage operation at duty cycles above 40%. Lateral diffusion during temporary zero-field conditions may lead to a slight increase in time-averaged zeta potential for square-wave-driven EO micropumps.

Experimental Studies of Coolant Temperature and Velocity on an Integrated Water Model of a Fast Reactor in Different Operating Regimes

Atomic Energy ◽  
2017 ◽  
Vol 123 (1) ◽  
pp. 25-33 ◽  
Author(s):  
A. N. Opanasenko ◽  
A. P. Sorokin ◽  
A. A. Trufanov ◽  
N. A. Denisova ◽  
E. V. Sviridov ◽  
...  
Keyword(s):  
Fast Reactor ◽  
Experimental Studies ◽  
Water Model ◽  
Coolant Temperature ◽  
Operating Regimes

Experimental studies of U-Pu-Zr fast reactor fuel pins in the experimental breeder reactor-ll

1990 ◽  
Vol 21 (7) ◽  
pp. 1863-1870 ◽  
Author(s):  
R. G. Pahl ◽  
D. L. Porter ◽  
C. E. Lahm ◽  
G. L. Hofman
Keyword(s):  
Fast Reactor ◽  
Experimental Studies ◽  
Reactor Fuel ◽  
Fast Reactor Fuel

Effects of T3 treatment on brown adipose tissue and energy expenditure in a patient with craniopharyngioma and hypothalamic obesity

2015 ◽  
Vol 28 (1-2) ◽  
Author(s):  
Hanneke M. van Santen ◽  
Antoinette Y. Schouten-Meeteren ◽  
Mireille Serlie ◽  
Ruud W.H. Meijneke ◽  
A.S. van Trotsenburg ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Thyroid Hormone ◽  
Energy Expenditure ◽  
Brown Adipose Tissue ◽  
Plasma Concentrations ◽  
Experimental Studies ◽  
Transient Effects ◽  
Hypothalamic Obesity ◽  
Bat Activity ◽  
Brown Adipose

AbstractPatients treated for childhood craniopharyngioma often develop hypothalamic obesity (HO), which has a huge impact on the physical condition and quality of life of these patients. Treatment for HO thus far has been disappointing, and although several different strategies have been attempted, all interventions had only transient effects. Since thyroid hormones increase energy expenditure metabolism (thyroid hormone induced thermogenesis), it was speculated that treatment with tri-iodothyronine (T3) may be beneficial. In 2002, a case report was published on reduction of body weight after T3 treatment for HO. No studies have been reported since. Recent experimental studies in rodents showed that T3 increases brown adipose tissue (BAT) activity via (pre)sympathetic pathways between the hypothalamus and BAT. Our aim was to investigate whether T3 treatment increases BAT activity in a patient with HO resulting from (treatment of) childhood craniopharyngioma.Thyroxine treatment for central hypothyroidism was switched to T3 monotherapy. Serum T3 and free thyroxine (FT4) concentrations were measured twice weekly for 2 months.No change in sympathetic and metabolic BAT activity, energy expenditure, or BMI was seen during T3 treatment despite the expected changes in thyroid hormone plasma concentrations.We conclude that T3 monotherapy does not seem to be effective in decreasing HO in childhood craniopharyngioma.

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