ASIPP EAST Tungsten-copper Divertor Development For EAST Present by D. -M. Yao EAST-Divertor Group,...
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Transcript of ASIPP EAST Tungsten-copper Divertor Development For EAST Present by D. -M. Yao EAST-Divertor Group,...
ASIPPEAST
Tungsten-copper Divertor
Development For EASTPresent by D. -M. Yao
EAST-Divertor Group, ASIPP-Hefei, China
25th Symposium on Fusion Engineering
June 10-14, 2013, San Francisco, US
HT-7/EAST
ASIPP
Outline
1. Plasma-facing components for EAST
2. Necessity of W/Cu Divertor for EAST
3. Structural design, R&D for the W/Cu divertor
4. ITER-like mono-block W/Cu-PFCs development
5. Flat-type W/Cu-PFCs development
6. Summary
2013-6-11 225th SOFE, San Francisco US, June 10-14, 2013
HT-7/EAST
ASIPP
PFC for EAST
2013-6-11 325th SOFE, San Francisco US, June 10-14, 2013
The EAST tokamak 6 campaigns operation , PFCs have been upgraded in deferent stage. The 1st generati on di vertor (2006~2007)
Mo movable poloidal limiter + Stainless Steel PFCs for First Plasma and first campaign operation
HT-7/EAST
ASIPP
PFC for EAST
2013-6-11 425th SOFE, San Francisco US, June 10-14, 2013
Active water-cooled PFC Tolerable heat flux <2MW/m2
Full C PFCFull C PFC
2008-20112008-2011
Mo First Wall + C DivrertorMo First Wall + C Divrertor
20122012
HT-7/EAST
ASIPP
Necessity of W/Cu Divertor
2013-6-11 525th SOFE, San Francisco US, June 10-14, 2013
In the past years, the plasma heating power for EAST does not exceed 10 MW. Simulation results of divertor heat flux summarized as Below:
Divertor Pin (MW) ne, sep (1019/m3) Te,div (eV) qdiv (MW/m2)
CDN1.5 0.31 85 1.02.5 0.55 40 1.15.0 0.98 22 2.010.0 1.65 20 3.6
SN1.5 0.37 100 2.02.5 0.67 40 1.85.0 1.16 26 3.010.0 1.88 27 7.0
HT-7/EAST
ASIPP
Necessity of W/Cu Divertor
2013-6-11 625th SOFE, San Francisco US, June 10-14, 2013
L-Mode
H-Mode
The heating power will be rapid increased to 20MW
HT-7/EAST
ASIPP
W/Cu Divertor Project Divertor
ITER-like configuration and structure, i.e., Monoblock targets (~10MW/m2) and W Flat-type dome and baffler (3~5MW/m2)
First wall Mo +CVD-W or W flat typeMax. heat flux capability 1~3MW/m2
Schedule2013-2014WUdiv + CLdiv + Mo (+ a new upper cryopump) 2015-2016Wdiv + MoFW +WFW(depends)
2013-6-11 1625th SOFE, San Francisco US, June 10-14, 2013
Target: W monoblock
FW: Mo tiles
2013 upper-div: W monoblock and flat-type
2013 low-div: Carbon tiles
HT-7/EAST
ASIPP
Structure design – supports
2013-6-11 25th SOFE, San Francisco US, June 10-14, 2013 8
Outer support
Inner support
Middle support
原热沉位置
现热沉位置
Poster: TPO-110Zibo Zhou
HT-7/EAST
ASIPP
Structure design – PFUs/CB
2013-6-11 25th SOFE, San Francisco US, June 10-14, 2013 9
Flat type Wof ~2mm thick
Compact end-boxesfor cooling connects
End-boxesEnd-boxes
End-box design
Coolant fromCassette body
Monoblockunits ×4-5
Monoblock-W/Cu targets
• ~15,000 monoblocks• 720 monoblock-units• 240 flat-type mockups• E-beam employed for CuCrZr welding
HT-7/EAST
ASIPP
Structure design – CB assembly
2013-6-11 25th SOFE, San Francisco US, June 10-14, 2013 10
Portnumber
Cassettenumber
Cassettes/port
PFUs/cassette
EAST 16 80 5 4/1/5ITER 18 54 3 16/34/22
•Tolerance of plasma- facing surface: toroidal: 2mm; neighbor: 0.5mm
HT-7/EAST
ASIPP
Structure design – cooling
2013-6-11 25th SOFE, San Francisco US, June 10-14, 2013 11
Requirements for cooling• Surface temperature of W monoblock < 1200 ℃
• Maximum temperature of CuCrZr < 500 ℃• Water coolant, inlet temperature 20 , and ℃
temperature rise < 70 , to avoid boiling℃ (total length a set of PFU: 1329mm)
HT-7/EAST
ASIPP
R & D for structure/assembly
2013-6-11 25th SOFE, San Francisco US, June 10-14, 2013 12
VV simulator for assembly of supports + CBs
HT-7/EAST
ASIPP
ITER-like W/Cu monoblocks
• ITER grade W has been manufactured in batch scale in Chinese Company
• W/Cu monoblocks: W&Cu bonded employing HIP technology
2013-6-11 1325th SOFE, San Francisco US, June 10-14, 2013
HT-7/EAST
ASIPP
ITER-like Monoblock W/Cu PFMC
2013-6-11 14
W/Cu mockup with W tiles was manufactured successfully by Hot Radial Pressing (HRP), showing good bonding between monoblocks and CuCrZr tube.
25th SOFE, San Francisco US, June 10-14, 2013
The testing W/Cu mockup with W monoblock tiles was manufactured by Hot Isostatic Pressing (HIP). And also successed.
HIP
Innovative technology combinations
HIP + HIP HIP + HRP
HT-7/EAST
ASIPP
HIP+HIP/HRP
HIP+HRP w/ 34 W-monoblocks ITER qualification mockup
2013-6-11 1525th SOFE, San Francisco US, June 10-14, 2013
===================================================
HIP+HIPEAST design
HT-7/EAST
ASIPP
Flat-type W/Cu PFMC
Flat-type W/Cu mockups have been being manufactured by means of various technologies
HIP & VHP: Step1:The interface of W/Cu were joined by HIP or vacuum hot pressing (VHP) at higher temperature of ~900 ℃, Step2: the interface of Cu/CuCrZr was bonded by VHP or HIP at temperature of 500~600℃.VPS & CVD coatings: Step1: Cu/CuCrZr by VHP / HIP, Step2: coating W on Cu.
2013-6-11 1625th SOFE, San Francisco US, June 10-14, 2013
HIP / VHPVPS / CVD
VHP
or gradient W/Cu layer
HT-7/EAST
ASIPP
VPS/CVD-W & Castellation
2013-6-11 25th SOFE, San Francisco US, June 10-14, 2013 17
W
Cu
VPS-W
VPS-W W
Cu
W/Cu interlayers
CVD-W: WF6+3H2→W+6HF0.3~0.5mm/h, porosity <1%, 99.999wt.%
VPS-W: porosity 5-10%, 99.9wt%
HT-7/EAST
ASIPP
High Heat Flux Testing
23/4/21 18
A 60kW e-beam facility at SWIP
Mockup by HIP + HRP
2013-6-11 1825th SOFE, San Francisco US, June 10-14, 2013
HT-7/EAST
ASIPP
Thermal fatigue testing
Heat load ~ 8.4MW/m2, cooling water of 2m/s, 20℃, 15s/15s on/off cycles.
The mock up survived up to 1000 cycles, with surface temperature up to 1150℃.
The temperature difference of cooling water between inlet and outlet raised up to 18℃.
2013-6-11 1825th SOFE, San Francisco US, June 10-14, 2013
Cycle 1
Cycle 1000
Cycles 1-2
Cycles 999-1000
HT-7/EAST
ASIPP
Ultrasonic NDT for monoblock-PFCs
Single reflector sensor, spiral scanning ultrasonic inspection of W/Cu interface
Cu
W
Defects > 2mm
Developed phased array, rotating reflector ultrasonic NDT inspection technologies.
2013-6-11 2025th SOFE, San Francisco US, June 10-14, 2013
HT-7/EAST
ASIPP
Prototype
Prototype of EAST divertor W/Cu armour was developed
2013-6-11 25th SOFE, San Francisco US, June 10-14, 2013 21
HT-7/EAST
ASIPP
Summary
• The EAST Plasma H&CD power will be increased to 20MW in near future years, EAST upper divertor is being upgrade to ITER-like.
• Structure design,and R & D has been finished
batch manufacture has been satrted.
• First Cassette body and first plasma facing units have been made.
• The ITER-like W divertor expect operate before end of 2013
2013-6-11 25th SOFE, San Francisco US, June 10-14, 2013 22
HT-7/EAST
ASIPP
2013-6-11 23
Thanks for your attention!
25th SOFE, San Francisco US, June 10-14, 2013