the neutronics studies of fusion fission hybrid power reactor
DESCRIPTION
The Neutronics Studies of Fusion Fission Hybrid Power Reactor. Youqi Zheng Ph. D N uclear E ngineering C omputational P hysics Lab. Xi’an Jiaotong University. Contents. Background Fusion Source and Blanket Design Neutronics Design and Sensitivity Analysis Conclusions. - PowerPoint PPT PresentationTRANSCRIPT
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核工程计算物理实验室Nuclear Engineering Computational Physics
23/4/19
The Neutronics Studies of Fusion Fission Hybrid Power Reactor
Youqi Zheng Ph. D
Nuclear Engineering Computational Physics Lab. Xi’an Jiaotong University
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Contents
Background
Fusion Source and Blanket Design
Neutronics Design and Sensitivity Analysis
Conclusions
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NOW 2018 2030
2050
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A long way for the pure fusion energy, butA short way for the application of fusion source
Background(1/3)
It is well recognized thatthe fusion fission hybrid power reactor is an important early use of fusion source
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After 2000
1991-2000
1986-1990
1980-1985
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Background(2/3)
R&D of hybrid reactor in China
Re-evaluation for Producing Energy, Breeding and Transmutation
R&D of Hybrid Power Reactor (National Magnetic Confinement Fusion Science Program, 2010)
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Background(3/3)
The target—A hybrid power reactor• 1000MWe Power Output for 5 years• Tritium self-sustaining considering 5% loss• Applying the existing fission technology as much as possible• Sufficient energy multiplication of blanket for different fusion power
The first step• Determining the outline of reactor• Determining the candidate fuel • Evaluating the feasibility
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Contents
Background
Fusion Source and Blanket Design
Neutronics Design and Sensitivity Analysis
Conclusions
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The referred fusion reactor• Citing from the works on FDS-I by ASIPP (under the cooperation in
National Magnetic Confinement Fusion Science Program )
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Fusion Source and Blanket Design (1/4)
Parameters Reference ValueMajor radius/m 4Minor radius/m 1Aspect ratio 4Plasma elongation 1.78Triangularity 0.4
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Fusion Source and Blanket Design (2/4)
Preliminary evaluation of water cooling blanket
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200mm is required for the FW based on the press analysis (Referring: for a PWR vessel 43mm is required , but the practical one is >200mm)
For the fuel pins and pressurized water coolant with 15.5MPa
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Fusion Source and Blanket Design (3/4)
The modular-type pressure tube blanket
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60cm
Tri tium Breeding Zone
Fuel Zone
35.5cm
24.5cm
135cm
120cm
Pressuri zed Tube
Hel ium Tube
LiO2
Graphi te & RAFM
Refl ector&
Shielding Layer
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Fusion Source and Blanket Design (4/4)
The simplified evaluation model
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dVdEdErs
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Contents
Background
Fusion Source and Blanket Design
Neutronics Design and Sensitivity Analysis
Conclusions
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Neutronics Design and Sensitivity Analysis (1/4)
Energy multiplication requirements of the fission blanket
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1000fuP M
For the 50MW fusion power Keff >0.9
For the 100~200MW fusion power Keff~0.8
For the 500MW fusion power Keff~0.6
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Neutronics Design and Sensitivity Analysis (2/4)
Keff varying in the lifetime of different fuels
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Reprocessed fuel for high energy multiplicationSpent fuel for middle energy multiplicationNatural uranium fuel for low energy multiplication
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High energy multiplication blanket
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Neutronics Design and Sensitivity Analysis (3/4)
14.3%w/o PuModerator-fuel ratio 1.0Gd2O3 0.85%w/o
4.5%w/o PuMore plutonium contentFlattened burn-up process
Burnable poison is another choice
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Low energy multiplication blanket• Higher fusion power and released blanket
performance
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Neutronics Design and Sensitivity Analysis (4/4)
Moderator-fuel ratio 0.5Modified blanket
Moderator-fuel ratio 1.0The same blanket
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Contents
Background
Fusion Source and Blanket Design
Neutronics Design and Sensitivity Analysis
Conclusions
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The reprocessed fuel containing existing plutonium from PWRs makes the hybrid power reactor feasible in the coming future
Progress of fusion technology may encourage the more easier fuels like the natural uranium fuel and directly burning the spent fuel from PWRs
Advanced work can and should be boosted based on the analysis
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Conclusions (1/2)
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Discussions• High energy multiplication
Fuel support of the reactors– ~40tons plutonium will be loaded every 5 years
Control of the reactors– 90 times multiplication down to 60 times
• Low energy multiplication For the natural uranium fuel, the required small moderator-
fuel ratio is very difficult to achieve for the pressure tubes For the spent fuel, the fuel processing before loading
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Conclusions (2/2)
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