CURRENT DESIGN STATUS OF THE EU SOLID BREEDER TEST BLANKET MODULE

Transcription

1 CURRENT DESIGN STATUS OF THE EU SOLID BREEDER TEST BLANKET MODULE L.V. Boccaccini, R. Meyder, H. Neuberger and the HCPB Design Team CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 1

2 Outlines Presentation of the status of the present design of the HCPB TBM system and its integration in ITER Considerations on the different test variants of the HCPB TBM and testing proposals CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 2

3 TBM System TBM Piping, RH, Auxiliary Systems: - Helium Coolant - T Extraction Port Plug - Coolant Purification CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 3

4 Cap HCPB TBMs design and analyses Grid Back Plate - Manifolds Grounding Attachment system FW Breeder Unit He Purge He Loop Dimensions (in mm): 1270 (tor) 740 (pol) x 600 (rad) CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 4

5 Breeder Unit Beryllium location He inlet Cooling Plate Purge outlet Purge inlet He outlet Ceramic Breeder ~5 kg CB ~15 kg Be CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 5

6 Thermo-hydraulic lay-out CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 6

7 Manifold lay-out CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 7

8 TBM Sub-Component Engineering Design Breeder Unit FW Cap Grid Manifold System CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 8

9 Manufacturing Technologies: Cooling Plates Von der Probeschweißung zur BU-Kühlplatte (Dr. Von der Weth, IMF-II) Schritt 1: Erste Probeschweißungen unter Variation der Prozessparameter, Aussage der Qualität der Schweißung gibt die Zähigkeit (Kerbschlagbiegeversuch) Oben: Schweißprobe vor und nach der Entnahme von Proben zur Bestimmung der Qualität der Naht Schritt 2: Schweißen von Platten mit Kanälen in der Schweißebene unter Variation der Kanalabstände (Sicherstellen eines konstanten Anpressdruckes) Oben: Kanalabstand 5 mm Unten: Kanalabstand 11 mm Unten: Prozessparameter und deren Einfluss auf die Zähigkeit der Schweißnaht Schritt 3: Verschweißen von Platten mit Kanälen und Gasverteilern zur Überprüfung der Gasdichtheit der Nahtstelle Links: CAD- Modell der Schweißprobe Mitte: Eine Hälfte der Probe vor der Schweißung Rechts: Nach erfolgter Schweißung und Probenentnahme Nächster Schritt: Schweißung einer kompletten BU- Kühlplatte aus zwei Hälften Links: Kühlplattenhälfte Rechts: CAD-Modell einer BU mit Kühlplatte CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 9

10 Joining technology selection W001 welding Cap-FW EB welding CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 10

11 Helium Coolant System CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 11

12 TBM performance analyses Power density [W /cm 3 ] mm ceramic bed Be Ceramic Steel (breeding bed) M-rad M-pol M-tor Distance from FW [cm] Neutronics Thermo-hydraulics EM Analisys Structural Tritium control Safety CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 12

13 Integration in ITER CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 13

14 Conceptual design of ITER Integration Port Plug Interspace Port Cell TBM Port Integration Cask CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 14

15 Status of the EU HCPB Design A conceptual design of the new modular HCPB blanket TBM, including performance analyses is completed Engineering design of the first TBM is ongoing A conceptual design for the integration of the TBM System into ITER has been proposed Conceptual design, definition of operational scenarios, component selection and thermo-hydraulics analysis of the Helium Coolant System have been done. Analysis of the reference safety scenarios is ongoing CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 15

16 Mid and long-term programme Engineering design of the TBM Thermo-hydraulics tests to investigate helium cooling performances (e.g. FW, grid and manifolds). Development of fabrication technologies of TBM sub-components and joint techniques Design, construction and test of sub-component mock-ups (e.g. Breeder Units) Design, construction and test of 1/3 prototypical mock-up Safety report for start of licensing (2006) Test definition Detailed analysis of the different experiments Design of the related measurement systems and definition of the operational scenarios Diagnostics CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 16

17 Time schedule of TBMs in ITER Operational year ITER Master schedule first plasma H-H D-D Low duty D-T High duty D-T Refurbishm. stand. burn pulse No. / year ) EM TBM fabrication and qualification operation in ITER post test examination 2) NT TBM fabrication and qualification stand-by operation in ITER post test examination 3) TM -TBM fabrication and qualification stand-by operation in ITER post test examination 4) PI TBM fabrication and qualification stand-by operation in ITER post test examination CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 17

18 Electromagnetic TBM CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 18

19 EM TBM proposal It is inserted in ITER starting from the day-1. It is tested during the first 3 years of the H-H phase (no neutron). The aim of this test is 1) to follow the commissioning procedures of ITER during the start phase, 2)use a not-contaminated environment for the testing of the overall system, 3) to perform important experiments on the EM- behaviour of the TBM (i.e. disruption withstanding, impact of ferromagnetic materials) As no experiments are foreseen in this phase that require the use of relevant materials of the Breeding Zone only few cells are filled with CB and Be. The remain cells will be filled by glass pebbles to simulate the relevant characteristics of the BZ for the EM testing (e.g. weight, electric conductivity, mechanic stiffness of a granular material) Instrumentation: conventional (thermo-couples, pressure transducers, etc.), EM specifics (Rogowki and pick-up coils, Acceleration sensors, strain gauges, etc.) CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 19

20 Neutronics and Tritium Production TBM CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 20

21 NT TBM proposal It is inserted in ITER starting from the first plasma with neutrons (D-D including 1 or 2 years of the low-duty D-T phase). The aim of this test is to investigate the neutronic behaviour (flux and T-production) of the TBM under relevant fusion conditions. As far as the objective to prove the TBR of the concept (for DEMO) see the next slides. The concept proposed foresees a volume of circa 0.8 m 3 of relevant materials to give a sufficient relevant environment in order to perform neutronic measurements. Hence, in the breeding zone relevant materials (at least the correct composition) should be provided. To reduce extrapolation to DEMO the geometry is selected as similar as possible to the reference DEMO concept. It is under discussion if all the cell should be identical (geometry and composition). Instrumentation: conventional plus NT specific (see next slide) CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 21

22 Prove of the TBR in DEMO The capability for achieving Tritium self sufficiency within some uncertainty margin (accounting also for the storage of T necessary for restarting and starting of new reactors) must be proven by means of neutronics calculations in the design phase. This requires to qualify the neutronics calculations and validate their predictions through suitable neutronics experiments. A continuous effort is needed to improve the precision of these calculations. A related R&D programme is ongoing (partially under an IEA agreement) with the objective to qualify and improves the nuclear data base for neutronic calculations, the computational tools and the models. Benchmark experiments at available 14-MeV neutron generators, and, in future, in ITER under relevant fusion conditions are considered as essential steps for this qualification. CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 22

23 Measurement concept for the NT TBM CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 23

24 Thermo-mechanics TBM HCPB DEMO CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 24

25 Analysis Breeding unit time constants FLUENT Analysis CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 25

26 Plant Integration TBM CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 26

27 Conclusions EU proposes a HCPB concept of blanket for DEMO to be tested in ITER. A strategy of testing in ITER has been elaborated based on the successive irradiation of 4 TBMs, each dedicated to a particular experimental campaign. The design of the TBMs and the related performance analyses are almost completed; experiments are starting to validate the design principles. Integration in ITER has been investigated and proposals defined. CBBI-13, Santa Barbara, 30th Nov. 2nd Dec., 2005 L.V. Boccaccini slide # 27