Progress and Preliminary R&D Plans of China Solid Breeder TBM
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1 Progress and Preliminary R&D Plans of China Solid Breeder TBM K.M. Feng Presented at 13 th Ceramic Breeder Blanket Interaction Workshop Santa Barbara, CA, USA Nov. 30-Dec. 2,
2 Contents I. Introduction II. Design Progress of CH HC-SB TBM III. Preliminary R&D and Test Plans IV. Possible Collaboration with Other Parties V. Summary 2
3 I. Introduction A description design and it s performance analysis of CH HC-SB TBM have been carried out recently. A design description document (DDD) of the HC-SB TBM have been completed recently. The relevant R&D, test plans based on the TBM design were proposed. China hopes to widely collaborate with other ITER parties under TBWG framework, and expects to deliver a HC-SB TBM to ITER on day one. Possible collaboration field on TBM R&D with partiers have been given. 3
4 II. Design and Analyses of CH HC-SB TBM 4
5 CH HCS 630mm(d) X 660mm(w) X 890mm(h) TWCS Present design is based on the ¼ port size on Port C; However, It is easily extended to a half-port-space module. Assumed Port Position for CH HC-SB TBM Module 5
6 Modular Design on Structure 90mm 664mm 664mm 630mm Be armor: 2 mm Max Temp. 543 O C First wall:thickness: 30 mm Material: Eurofer Max T: 530 O C Cooling tube: 18x14.5mm Unit cells: 3X3 sub-modules He pressure: 8 MPa Sub-modules m in toroidal m in radial m in poloidal Integration view of structure design 6
7 Main Characteristics 1. Modular structure design improve and strengthen the safety performance, reliability, maneuverability of test in ITER, and disassembly feasibility, more easy to replace the sub-module; 2. The BOT with ceramic pebble bed concept, Be as neutron multiplier are used in the design; 3. A U-shaped double-shell FW structure is used; 4. Each cell as a sub-module has relative independently cooling circuit (8 MPa He) and purge gas circuit (0.1 Mpa ). The cooling model in series connection from FW to sub-modules are used; 5. Each sub-module is a closed box by the top-lower plates with two side-plates. 7
8 Schematic view of CH HC-SB TBM Outside of structure Cross-section of module Coolant manifold Configuration of Sub-modules Sub-module structure Cross-section of sub-module 8
9 Exploded 3-D view of HC-SB TBM Structure and components design in detail is on going. 9
10 Cooling tube of FW section plane Coolant manifold Heat exchanger U-shaped double-shell FW structure 10
11 Interface Description HCS sub-system in TCWS Test port general arrangement TBM module assembly Equatorial test port area with transporter Transporter side wall pipe arrangement 11 Equatorial port and pipe area
12 Design parameters for the HC-SB TBM 12
13 HC-SB TBM Auxiliary Sub-system VV Port Cell TWCS vault BC TBM HCS CPS TMS NMS TES Tritium Building 13
14 Schematic views of Coolant flow Toroidal cross-section Coolant flow in FW Coolant flow in the sub-module Breeding zone Arrangement Back-plate Back-plate 14 Coolant Flow Direction
15 9 2b He,10MPa 300 2a 1 7a 6a 5 ES ES 8 6b 7b 4 He,300 3a 10 3b He 1 H2 He 16 11b 4b V2 V1 4a 2b 3 2a 1 TB M 2a/2b Filter 3 C ooler 4a/4b/4c Ionization Chamber 5 C old Trap 6 Wat er Colle ctor 7 Recuperator 8a/8b Molecular Sieves 9a/9b/9c Buffer 10 Hot Mg Be d 11a/11 b Co mpre ssor 12 Pd/Ag Permeater 13a/13 b/13c Ge tte r Bed 14a/14 b ISS 15 Heate r 16 Ma ke-up Un it 6 15 ES 7 8a Check v avle Op en v a vl e Cl os ed va vl e Pressure reducing vavle ES Evacuation system 4c ES 8b 13a 11 a 12 9b 13b 9c 14a 14 b 13c HC-SB TBM Auxiliary Sub-system Helium Cooling System (HCS) Tritium Measurement System (NMS) Tritium Extraction Subsystem (TES) TBM HCS TWCS Circ ulato r Dust filter ± ± 9a 10 HC-SB TBM Electr ic heater recup erator 3.5x 2.5m 2Va lve Main HX Flow chart of the TMS ± 5 Tritium Extraction System for TBM Flow scheme of the HCS system Draft layout of the helium cooling subsystem in the TCWS 21 The schematic of the gas flow calorimeter Layout of the TMS HCS TMS TES 30 Flow chart of the TES sub-system Space Requirement: The TES system must be installed in a glove box. The size of the Glove Box is: 5.5m 1.2m 5.5m (L W H). Lay-out of the TES sub-system 26 Coolant Purification System (CPS) Neutron Measurement System (NMS) 2200 micro-fission chamber 1-gas flow controller; 2a/2b-impurities getter bed; 3a/3b-tritium getter bed; 4-heater; 5-cooler; 6a/6b-buffer bank; 7a/7b-ionization chamber; 8-gas chromatograph9 circulator; 10 ZrCo bed Flow chart of the CPS Space requirement: A space of 1500mm 1200mm 2200mm (L W H) is needed for its assembly, maintenance and operation of the CPS Layout of the CPS 27 Schematic diagram of neutron fluxes and spectra measurement system Space Space requirement: A minimum minimum net net foot foot print print area area of of m 2 2 in in the the TCWS TCWS vault, vault, 0.5m 0.5m 3 3 in in transfer transfer cask, cask, will will be be needed needed Space Arrangement in TCWS for HCS subsystem micro-fission chamber assembly29 23 CPS NMS TCWS 15
16 Performance Analysis a. Neutronics calculations b. Activation analysis c. Thermo-hydraulic Analysis d. Thermo-Mechanical Analysis e. Preliminary E-M analysis; f. Preliminary LOCA, LOFA analysis, etc., Above performance analysis have been completed. The results in detail have been given in the CH HC-SB TBM DDD document. 16
17 Performance Analysis (Con t) Neutronics Calculation Temperature distribution of the HC-SB test module Stress distribution of the HC-SB test module Neutron flux distribution Tritium production 12.0 TBR = 1.15 (1-D, Li-6 enriched of 80%) Power: 0.76MW Tritium production: 0.033g/d Peak power: 8.9 MW/m 3 Energy density /MW/cm ONEDANT TWODANT 8.0 MCNP Radial distance from center of plasma /cm Power density 15 First wall Peak Temp. : 543 O C First wall Sub-module Sub-module Max. Stress are 244 MPa in FW and 219 MPa in sub-module cooling plate. Temp. Range: O C in the breeder zone; This analysis result of the cooling plate in the test module satisfies to the requirements Peak Temp.: 522 C in sub-module cooling plate of structure strength regulations Neutronics Thermo-hydraulic Thermo-mechanical Safety and Reliability Analysis Coolant Flow Scheme E-M and Accident Analyses Afterheat Activity model induced eddy currents eddy currents vs. time Deformation Equivalent Stress Safety and reliability 26 Flow scheme 27 In-vessel LOCA shear stresses maximum stresses 17 E-M and accident analysis 31
18 III. Test and R&D plans 18
19 Relevant R&D plans Continuously improve HC-SB TBM design Interface of TBM, frame and auxiliary system design; Improve and develop relevant software and database; Development of tritium measurement technology; Development of neutron diagnostic technology; 19
20 Relevant R&D plans (Con t) Manufacturing of key components Some necessary R&Ds are being performed for the ITER shielding blanket task in China. Relevant fabrication technology obtained will be useful for manufacturing of key components of TBM: (1) HIP technology for joining different materials, such as Be/Cu; (2) NDT inspection method; (3) High heat flux (HFF) test facility and method, etc. 20
21 The Structural Materials Development Strategy Development of RAFMs for TBM in China is being performed; Development of the ODS (oxide dispersion strengthened) steels and vanadium alloy steel are on going in China; Long-term is to develop SiC f /SiC composites material for advanced fusion blanket concepts. 21
22 Ceramic Breeder and Neutron Multiplier China has studied tritium-processing technology supported by national fusion program for many years. Knowledge accumulated in this field is useful for the TBM tritium technology. Two kinds of ceramic breeder( Li 4 SiO 4, Li 2 TiO 3 ), are developing in China. Fabrication of the ceramic powder Fabrication sample of the Li 4 SiO 4 and Li 2 TiO 3 pebbles 22
23 Equipments and Technique for Ceramic Breeder in CAEP Melting-spraying unit for the production of Li 4 SiO 4 pebbles γ-lialo 2 pebbles Separation System Control System 23 Li 2 ZrO 3 Pebbles
24 Time schedule for ceramic breeder technologies R&D Contents Development of microspheres fabrication technique Designing of radiation capsule for material test, designing of tritium circuit Property test ( mechanical,physical chemical and thermal property) Structure and contents designing of tritium; breeder by computation simulation Development of radiation capsule for material test, development of tritium circuit Property test ( radiation stability, tritium release behavior, tritium fabrication property) Tritium absorption and releasing behavior on tritium breeder Tritium breeder fabrication as designed by computation simulation 24
25 Development of Neutron Multiplier Main Chemical Composition of CH 2# and US S-65C ** Type No. Elements (wt.%) Be BeO Fe C Al Mg Grade 2# (CH) S-65C VHP (US) **Data from the Sixth Smelt Factory of Hunan Province. China has also large yielding capacity of Be and relevant experiences of neutron multiplier. China has built Be fabrication and manufactory in Ningxia Orient Non-ferrous Metal Group Co. A new project, to develop high quality Be in China, is being 25 implemented for ITER.
26 Development of Tritium Technologies Development of tritium extraction technology - Instrumentation development; - Hydrogen isotope separation; - Tritium extraction; - He coolant purification simulation loop; - Tritium control technology; - Tritium release behaviour and required purge gas conditions. Theoretical simulation and assessment - Tritium cycle modelling (tritium permeation, tritium inventory). 26
27 Tritium Technologies (con t) Develop tritium permeation barrier amorphous TiN(TiC)films by IBAD; Al 2 O 3 film by ions coating-oxidation, CVD, explosive spray, etc. - TPRF >1000 is obtained in specimen experiments. - To be applied in practice in tritium permeation barrier. Future R&D in the near future - Key technologies for components and subsystem - Tritium system loop test 27
28 Tritium Processing Equipments in CAEP Electrolytic Cell Hydrogen Purification Unit Promising H,T and impurities on line analytical tools 28
29 Tritium Permeation Barrier Study in CIAE 100 Fe-Al layer 316L base Fe-Al layer 316L base atom.% Fe Cr Ni Al Mo 与渗层表面距离 (μm) Microstructure of the Fe-Al coating The composition profile in the coating Fe-Al intermetallic compounds in the coating layer 29 Process apparatus for the Fe-Al coating
30 Time schedule for tritium technologies ISS: TCAP, PMS Component structure optimization CECE tritiated water disposal On line analytic tools :MGC, QMS, Tritium emergency-response system Tritium permeation barrier Demonstration system Integration and test of real system 30
31 Irradiation Test on High Flux Reactors China has built a High Flux Engineering Test Reactor (HFETR) in the China Institute of Nuclear Power (CINP). HFETR is a largest one in Asia. Neutron Flux: Thermal neutrons : n/cm 2 sec; (E<0.625eV) Fast neutrons : n/cm 2 sec; (E>0.625eV) 235 U of 90% enriched in U fuel. Total power: 125 MW (th) In addition, there are two sets experiment reactors with power of 20MW and 40MW are constructing in CIAE and CAEP of China. These facilities and their ability are useful for the irradiation experiment of the TBM structure materials, tritium breeders, neutron multiplier etc. High Flux Engineering Test Reactor 31 (HFETR)
32 High Temperature He Experiment Loop A High Temperature He Experiment Loop (HTHEL) with 700 O C and 8-10 Mpa, which is useful for HC-SB TBM design and R&D activities, is proposed to be built in China. He Test Loop for HTGR HTHEL sketch map China has built a high temperature gas-cooled reactor (HTGR). The technologies and experiences gained in HTGR project are useful. Temp.: 900 O C, Total Power: 10MW Pressure: 3 MPa 32
33 Design and R&D Schedule for HC-SB TBM Items Day 1 Design Phase Detail design Engineering design Materials Development Ceramic Breeder, Li 4 SiO 4, Li 2 TiO 3 Structural material, (RAFS steel) Neutron multiplier, Be Performance Testing In-pile testing Out--pile testing Tritium Technology Tritium Extraction Technology Tritium permeation Barriers Coolant purification simulation loop 33
34 Out-of-pile Test Small-sized HC-SB TBM mock-up tests (scale 1:4 or larger) Ceramic pebble bed thermo-mechanical test First wall heat removal test and thermal cycle test Prototype TBM mock-up test Heat removal test and thermal cycle test TBM check-out with the auxiliary systems prior to ITER installation 34
35 In-of-pile Test Tritium release behavior and required sweep gas conditions; Thermo-mechanical behavior of ceramic breeder and Be pebbles under neutron irradiation conditions; Structure materials irradiation test; Mechanical properties test of irradiated ferritic steel samples; 35
36 Time Schedule for CH HC-SB TBM Fabrication and Test Years TBM Sub-components qualification. Small mock-ups fabrication Test/qualification TBM Functional tests Small and medium size mock-ups fabrication Small and medium sizes mock-ups tests Full size mock-ups fabrication Full size mock-ups tests EM-TBM for installation CH EM-TBM fabrication CH EM- TBM acceptance tests Typical cost estimation : about Billion Chinese Yuan for one CH HC-SB TBM. ITER Operation Day one 36
37 Domestic Cooperation Units on R&D for HCSB TBM Ningxia Orient Non-ferrous Metal Group CO.,LTD Be pebbles SWIP Southwestern Institute of Physics (TBMs) TUNET Tinghua Tinghua Uni, Uni, Institute Institute of of Nucl. Nucl. Energy Energy Tech. Tech. (HCS) (HCS) CAEP China China Academy Academy of of Engineering Engineering Physics Physics (CPS, (CPS, TES, TES, Breeder )) SICCAS Shanghai Institute of Ceramics, Chinese Academy of Sciences (Ceramic Breeder) 37
38 V. Summary New progress and status of CH HC-SB TBM since last TBWG meeting are introduced briefly. Under the cooperation with domestic institutes, a preliminary design and analysis for CH HC-SB TBM module has been carried out. A design description document (DDD) have been completed recently. Preliminary R&D program, timescale and milestones, up to the installation in ITER (2015), as well as the collaboration expected with other Parties are presented. Relevant R&D on the key techniques will be preformed with the cooperation of domestic and international institutions and companies. 38
39 Thank you for your attention! 39
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