scholarly journals Preliminary evaluation of the expansion system size for a pressurized gas loop: application to a fusion reactor based on a helium-cooled blanket

2017 ◽  
Vol 35 (1) ◽  
pp. 211-218 ◽  
Author(s):  
Gianfranco Caruso ◽  
Matteo Nobili
Keyword(s):  
Fusion Reactor ◽  
System Size ◽  
Preliminary Evaluation ◽  
Expansion System ◽  
Gas Loop

A new 3He gas loop blanket for fusion reactor systems

1989 ◽  
Vol 8 ◽  
pp. 181-184 ◽  
Author(s):  
Eiji Takada ◽  
Tetsuo Iguchi ◽  
Masaharu Nakazawa
Keyword(s):  
Fusion Reactor ◽  
Gas Loop

scholarly journals Cost Assessment of a Tokamak Fusion Reactor with an Inventive Method for Optimum Build Determination

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6817
Author(s):  
Gahyung Jo ◽  
Jae-Min Kwon ◽  
Ara Cho ◽  
Hyun-Kyung Chung ◽  
Bong-Guen Hong
Keyword(s):  
Fusion Reactor ◽  
Cost Model ◽  
Minimum Cost ◽  
System Size ◽  
Capital Cost ◽  
Plasma Current ◽  
Tokamak Fusion Reactor ◽  
Wide Range ◽  
Major Radius ◽  
The Impact

An inventive method was applied to determine the minimum major radius, R0, and the optimum build of a tokamak fusion reactor that simultaneously meets all physics, engineering, and neutronics constraints. With a simple cost model, tokamak systems analyses were carried out over ranges of system parameters to find an optimum build of a tokamak fusion reactor at minimum cost. The impact of a wide range of physics parameters and advanced engineering elements on costs were also addressed. When a central solenoid was used to ramp up a plasma current, design solutions with a cost of electricity (COE) between 109 and 140 mills/kWh, direct capital cost between 5000 and 6000 M/USD, and net electric power, Pe between 1000 and 1600 MW could be found with a minimum R0 between 6.0 and 7.0 m, and fusion power, Pfusion between 2000 and 2800 MW. When the plasma current was driven by a non-inductive external system, the system size and costs could be reduced further; a COE between 98 and 130 mills/kWh, direct capital cost between 4000 and 5000 M$, and Pe between 1000 and 1420 MW could be found with a minimum R0 between 5.1 and 6.7 m, and Pfusion between 2000 and 2650 MW.

scholarly journals Preliminary evaluation of decay heat in a HCPB DEMO fusion reactor

2014 ◽  
Vol 4 ◽  
pp. 126-129 ◽  
Author(s):  
Shanliang Zheng ◽  
David Ward ◽  
Raul Pampin ◽  
Lee W. Packer
Keyword(s):  
Fusion Reactor ◽  
Preliminary Evaluation ◽  
Decay Heat

Alignment of small He-Bubbles during in situ deformation of Al-foils

1978 ◽  
Vol 36 (1) ◽  
pp. 396-397
Author(s):  
E. Ruedl ◽  
P. Schiller
Keyword(s):  
Fusion Reactor ◽  
Matrix Material ◽  
Fusion Reactors ◽  
First Wall ◽  
Potential Matrix ◽  
In Situ Deformation ◽  
Α Particles ◽  
Metal Aluminium

The low Z metal aluminium is a potential matrix material for the first wall in fusion reactors. A drawback in the application of A1 is the rel= atively high amount of He produced in it under fusion reactor conditions. Knowledge about the behaviour of He during irradiation and deformation in Al, especially near the surface, is therefore important.Using the TEM we have studied Al disks of 3 mm diameter and 0.2 mm thickness, which were perforated at the centre by double jet polishing. These disks were bombarded at∽200°C to various doses with α-particles, impinging at any angle and energy up to 1.5 MeV at both surfaces. The details of the irradiations are described in Ref.1. Subsequent observation indicated that in such specimens uniformly distributed He-bubbles are formed near the surface in a layer several μm thick (Fig.1).After bombardment the disks were deformed at 20°C during observation by means of a tensile device in a Philips EM 300 microscope.

Preliminary Evaluation of a Weibull Function for Fitting Slow-Component Eye Velocity over the Time Course of Caloric-Induced Nystagmus

1989 ◽  
Vol 32 (3) ◽  
pp. 681-687 ◽  
Author(s):  
C. Formby ◽  
B. Albritton ◽  
I. M. Rivera
Keyword(s):  
Time Course ◽  
Slow Component ◽  
Weibull Function ◽  
Preliminary Evaluation ◽  
Mathematical Function ◽  
Before And After ◽  
Best Fitting ◽  
Eye Velocity ◽  
Fitting Parameters ◽  
Weibull Equation

We describe preliminary attempts to fit a mathematical function to the slow-component eye velocity (SCV) over the time course of caloric-induced nystagmus. Initially, we consider a Weibull equation with three parameters. These parameters are estimated by a least-squares procedure to fit digitized SCV data. We present examples of SCV data and fitted curves to show how adjustments in the parameters of the model affect the fitted curve. The best fitting parameters are presented for curves fit to 120 warm caloric responses. The fitting parameters and the efficacy of the fitted curves are compared before and after the SCV data were smoothed to reduce response variability. We also consider a more flexible four-parameter Weibull equation that, for 98% of the smoothed caloric responses, yields fits that describe the data more precisely than a line through the mean. Finally, we consider advantages and problems in fitting the Weibull function to caloric data.

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