the need for small fusion reactors
DESCRIPTION
THE NEED FOR SMALL FUSION REACTORS. Brendan McNamara, Leabrook Computing,2008 Lawrence Livermore National Laboratory. GLOBAL NUCLEAR ENERGY. NUCLEAR ENERGY STALLS. SLOWER GROWTH MISSES ALL TARGETS. LOW GROWTH IN RECESSION LEAVES NUCLEAR AS MINOR PLAYER AT ~20% MEDIUM GROWTH LEADS TO - PowerPoint PPT PresentationTRANSCRIPT
19/04/2023 [email protected] 1
THE NEED FORSMALL FUSION REACTORS
Brendan McNamara, Leabrook Computing,2008
Lawrence Livermore National Laboratory
19/04/2023 [email protected] 2
GLOBAL NUCLEAR ENERGY
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GLOBAL NUCLEAR GROWTH
GEN II PWR GEN III PWR GT-MHR BREEDER
YEAR
GIG
AW
AT
T-Y
EA
RS
GW
Ye
GEN II PWRs
GEN III PWRs
GT-MHRs
SFRs
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NUCLEAR ENERGY STALLS
0 5 10 15 20 25 30 35 40 45 501E+00
1E+01
1E+02
1E+03
1E+04
1E+05
1E+06
BREEDER STARTUP FROM SPENT PWR FUEL
SPENT PWR RECYCLE TRU SPENT SFR
YEARS FROM 2000
TO
NN
ES
RECYCLE PWR FUEL
TRU STOCK
SFR REFUEL
PWR SPENT FUEL
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SLOWER GROWTH MISSES ALL TARGETSLOW GROWTH IN RECESSION
LEAVES NUCLEAR AS MINOR PLAYER AT ~20%
MEDIUM GROWTH LEADS TOTIGHT MARKETS FOR MINED URANIUMENERGY INDEPENDENCE FOR A FEW
MASSIVE USE OF WIND & SOLAR AT 3X$OR
COAL + RUNAWAY GLOBAL WARMING
RECYCLING + FUSION FUEL BREEDING CHANGES ALL SCENARIOS
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BREEDING FISSILE FUEL • 1T PLUTONIUM 1000 GWTH-days• 1T D-T FUEL 5000 GWTH-days
& 16 X NEUTRONS ALL AT 14.1 MeV
• 1 FUSION FROM HOT FUEL 17.1 MeV• 1 FISSION from a COLD NEUTRON 200 Mev
• TRANSMUTATION OF U-238 ……• 1 kg FUSION NEUTRONS 239 kg Pu
OR, WITH MULTIPLIER 360 kg Pu
HOT NEUTRONS IS THE PRIMARY PRODUCT!
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DEPLETED URANIUMDEPLETED URANIUMA MAJOR RESOURCE
ENOUGH DU IN UK TO RUN ALL ELECTRIC ECONOMY
FOR 500 YEARS
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START @ CULHAM
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NSTX PRINCETON
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TOKAMAK CONFINEMENT
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MAST & NSTX PERFORMANCE
• IPB98: tE = 0.0562 Ip0.93 Bt
0.15 R1.97 (a/R)0.58 M0.19 ne0.41 k0.78 P_in-0.69
• NSTX: Kaye et al. B SCALING MUCH STRONGER THAN ITER• Valovic et al., CULHAM: SIMILAR FOR COMBINED MAST/NSTX
DATA
• Kaye-Valovic: (MAST-type):
tE = Cp Ip 0.51-0.59 Bt
1.08-1.6 R1.97 (a/R)0.58 M0.19 ne0.0-0.44 k0.78
Pin-0.73
• McNAMARA: SELF CONSISTENT POINT MODEL FOR
I , B, T, n , P-fusion & tE,
WITH PLASMA PROFILES & GIVEN MAGNETIC GEOMETRY
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MICRO-INSTABILITY
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ST DESIGN SPACESPlasma N, Te, Ti Profiles
02
468
10
121416
1820
0 0.2 0.4 0.6 0.8 1
Radius
Prof
ile
10*N Te Ti Ion Energy
Fusion Profile
0.000E+00
2.000E-01
4.000E-01
6.000E-01
8.000E-01
1.000E+00
1.200E+00
1.400E+00
1.600E+00
1.800E+00
2.000E+00
0 0.2 0.4 0.6 0.8 1
Fusion Profile
-5
-4
-3
-2
-1
0
1
2
3
4
5
-4 -2 0 2 4
Chamber Wall Plasma Boundary
50% Fusion core
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BIG & COOL 25MW REACTORMAGNETICFIELD
R=1.50a= 0.94Kappa= 3.00Eps= 0.63 Delta=0.40 Bt=3.25
PLASMA
Ip=6.00Beta=5.54N20-peak=0.65 Ti-peak=10.01Te-peak= 7.68 H=1.10
2.00 2.20 2.40 2.60 2.80 3.00 3.20 3.40 3.60 3.80 4.000
1
2
3
4
5
6
7
8
9
10
SST-Pu BIG & COOL @ P-f=25 R=1.5, a=.94alf_n=0.75, alf-Ti=0.75,alf-Te=0.6, Ti=5.72,Te=4.8
I-p 0.1*Beta% QIPB(1.6) Q-KV(1.1) 0.1*P-in KV
Toroidal Field B-t
Te
sla
or
Ra
tio
s
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FIRST WALL NEUTRON DAMAGE
Sergei Dudarev, ITER Materials Chair, Imperial College & Culham
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DEPLETED URANIUM TOPLUTONIUM REACTOR FUEL
MOIR 1985
Cleanest fuel Breeding cycleEver.
Low radioactivity.
No need forFission Breeders.
Enough DepletedUranium in SellafieldFor 500 years of anAll electric UK!
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FUSION NEUTRONS
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THORIUM & U-233
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CROSS BREEDING FUEL
MHR Tritium Production vs Neutron Fraction
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
0.05 0.1 0.15 0.2
fT, Neutron Fraction for Li-6 Breeding
Tri
tiu
m P
rod
uc
tio
n (
kg
)
6x MHR600s 4x MHR 600s 3x MHR600s
SST P-Fusion vs Breeding Fraction
0
20
40
60
80
100
120
140
1 1.2 1.4 1.6 1.8 2
b-Pu, Pu Breeding per Triton burned
Fu
sio
n P
ow
er (
MW
)
3 x 600MWth MHRs 4 x 600MWth MHRs
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5 MISSIONS FORSMALL FUSION REACTORS
1. BREED Pu FROM DU – CLEAN, LOW RADIOACTIVITY
2. BREED U-233 FROM THORIUM
3. BREED TRITIUM FOR SFusR FLEETS
4. DESTROY LONG LIVED FISSION PRODUCTS
5. FUSION-FISSION POWER REACTORS WITH RECYCLED Pu
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SCALING1. MULTIPLE UNITS HIGH AVAILABILITY, EASY
MAINTENANCE
2. LOW POWER EXPENSIVE ELECTRICITY
3. ITER MATERIALS REQUIRED FOR FUSION POWER DEVELOPMENT
4. FAST REACTORS UNECCESSARY
5. OPERATED UNDER OUR STRICT NUCLEAR SAFEGUARDS LOCKDOWN.
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LASER FUSION BREEDER
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Be MULTIPLIER SPECTRUM
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LIFE & ST BLANKETS
Seed the startup. Run slowly shifting fuel balance. Thorium version, Moir 2008
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LLNL FUSION ACHIEVEMENTS
MAJOR COMPONENTS OF FUSION PROGRAMMES
SUPERB TECHNICAL ABILITY
INVENTIONS
MICROSTABLE PLASMAS
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LIQUID WALL MIRROR
• 10-15M CENTRAL COLUMN 30MW
• VERTICAL FOR EASY LIQUID WALL DESIGN.
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10A/20keV NEUTRAL BEAM
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BEST US COMPUTING
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SUPERCONDUCTING MAGNETS
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RESTORE THE
US FUSION PROJECTS!
OBAMA: $150Bn forRenewable Energy & Nuclear?
Yucca Mtn $25Bn diverted?
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GROWING UP WITH FUSION
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GROWING UP WITH FUSION
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ST POWER REACTORS
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SUPPORTING SLIDES
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IAEA FUSION CONF., GENEVA
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D3D @ GENERAL ATOMIC
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TRISO fuel in fuel blocks
Electricity
Hydrogen
LWRSpent Fuel
TRISO
Low-Enriched UraniumTRISO
Common Reactor Core - Ultra Safe Design
Weapons Surplus Pu
TRISO
LithiumBreedsTritium
1.7 kg/GW-y
Heat
MHRs can also use diverse fuels in same core design:because of properties of graphite and helium
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RECYCLING ‘SPENT FUEL’PWR
Breeding Ratio 0.6
UREX
93% U
2.5% Fissile
5.5%FP
PWR FUEL
4.5% 235U
95.5% 238U
SPENT FUEL1.1% 235U
92.0% 238U
0.12% Acts.
1.3% Pu
5.5% ASH-Fission
Products
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U-235 & Pu-239 FISSION
Shows why thermal reactors are easiest to build,.Plutonium is best for bombs. Fusion and Fast Reactors can burn anything. Australian Uranium Association
Fusion14.1 Mev
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DEEP BURN GT-MHR
4842
3630
24
General Atomics: Inflammable – No Meltdown – Burns U, Pu, Actinide Waste –
High Temperature (900 C) – 50% Thermal Efficiency – No Pu leakage –
300 year ILW.Russian Weapons Pu Burner
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VI. MILLION YEAR TRISO FUEL
Any enriched Fuel: U, Pu, Actinides
Contains all fission Products for 1 million years
No Pu leakage to contaminate structures No long lived ILW
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MOLTEN SALT THORIUM BREEDER
232Th + n 233Pa + b- + g 233U + b-
DBERR BUREAUCRACY
HAS WITHDRAWN THE UK
FROM PARTICIPATION IN
THE GENERATION IV PROGRAMME
2007
• THORIUM:• Good for
another 3000 Years
• France leads Gen IV research on:
• PWRs• MHRs• MSThBR• GCFR• SFR• Recycling
• UK Selling out
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UK Committee on Radioactive Waste Management
• Propose geological storage for all spent fuel, depleted Uranium, and ILW.
WRONG
• Should build Nuclear Fuel Vaults good for 1000 years.
• Should build Advanced Fuel Cycle & TRISO reprocessing plants.
• Should reserve all 300 year ‘waste’ of valuable metals.
• Should put the small amounts of ash and long lived waste in deep disposal.
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URANIUM MARKETSIAEA RED BOOK URANIUM
RANK Mt MINE PWRS
DATE
KNOWN 3.2 2000 207
EXPECTED 5.1 2020 330
SPECULATIVE 12.1 2030 784
MIT GUESS 80 2030 5174
SEAWATER 4000 ???? 258699
MUST EXTRACT FROM ENTIRE GULF STREAM!
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FUEL ENRICHMENT
Spent fuel is still 95% fuelAll Thorium, Uranium, Plutonium, Neptunium, & higher Actinides
can be transmuted and fissioned.
Each tonne can yield ~1000 GWth-days
Enough Uranium to run 10,000 reactors for 2000 years.