EMC at ITER. D. Beltran Electrical Engineering Division ITER Organization. RF & Hyper Conference Paris, 24 th May 2011

Transcription

1 RF & Hyper Conference Paris, 24 th May 2011 EMC at ITER D. Beltran Electrical Engineering Division ITER Organization RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 1

2 Outline 1. ITER introduction 2. EMC at ITER 3. Experiment in Alcator C-mod Tokamak 4. Conclusions RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 2

3 ITER Energy stored: 30 GJ ITER figures 180 km/h Charles de Gaulle: ~ tons, 260 m long Tokamak complex weight tons Empire State 400 tons Nb3Sn. Before ITER 15 tons/year. Sun surface Sun core ITER : o C : 15 million o C : 150 million o C RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 3

4 What are ITER s Aims? The overall programmatic objective: To demostrate the scientific and technological feasibility of fusion energy for peaceful purposes The principal goal: To design, construct and operate a Tokamak experiment at a scale which satisfies this objective Long Plasma Pulses ITER is designed to confine a plasma in which a-particle heating dominates all other forms of plasma heating ITER will be the world s first experimental fusion reactor with a selfsustained burning plasma of several hundred seconds (Inductive operation) to several thousand seconds (Non-inductive operation) duration. RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 4

5 Fusion Power Production in ITER Nuclear Facility 1g D+T 30 MW*hr (~10t coal) RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 5

6 Overview of the ITER Tokamak Huge and Complex RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 6

7 World wide project 90% in-kind RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 7

8 Machine size ITER (2 football fields) JET (0.22 football fields) 4.5 JET=1 football field 10 times bigger 30 years last big Tokamak RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 8

9 Earthing topology Singulus Pointus Terrus Mesh-CBN At least 200 Tokamaks since 1954 with single point RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 9

10 Norms and standards RCC-E: Design and construction rules for electrical equipment of nuclear islands. IEC : EMC-Installation and mitigation guidelines - Earthing and cabling IEC to 4: Protection against lightning IEC : Electrical installations of buildings. Selection and erection of electrical equipment- Earthing arrangements, protective conductors and protective bonding conductors. IEC : EMC-Generic standards - Immunity for industrial environments. IEC : EMC-Testing and measurement techniques - Test for immunity to conducted, common mode disturbances in the frequency range 0 Hz to 150 khz IEC : EMC-Generic standards - Emission standard for industrial environments. ITER specification for conducted emissions 30 Hz to 30 MHz ITER test specification for Magnetic field compatibility tests RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 10

11 Immunity I IEC , IEC , IEC RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 11

12 db/dt -> IEC Immunity II Location Continuous Duration Short-duration (1 to 3 sec) Port-cell 23 mt/s 77 mt/s Tokamak building (except port cells) 2.3 mt/s 7.8 mt/s But specific test for equipments τ > 7 ms B (120 mt 5 mt) Supplier certification or Custom test (EED framework contract) Change location or Magnetic shielding RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 12

13 Emission Based on MIL STD 461 CE IEC RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 13

14 Bonding zones Mesh-CBN: LCZ: Common bonding network Loop Control Zone RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 14

15 LCZ Loop Control Zone In-cryostat and In-vessel A single Bonding path Equipment isolated at 0. 5 kv Exceptions case-by-case (ports, blanket) RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 15

16 Mesh-Common Bonding Network LF: low mesh-cbn impedance HF: shielding & mutual inductance RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 16

17 Mesh-CBN Re-bars (1x1 mesh in Tokamak): R DC <1 mω, L=1 μh RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 17

18 EM Zoning Bonding to boundary of EM Zone Shield Filter RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 18

19 Zone Boundary RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 19

20 Machine bonding RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 20

21 Cubicle bonding RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 21

22 Experiment in Alcator C-mod Tokamak Toroidal resistance: 20 μohm (ITER 10 μohm) Time constant: 50 ms (ITER 500 ms) Plasma current: 3 MA (ITER 15 MA) RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 22

23 Experiment in Alcator C-mod Tokamak RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 23

24 Cable segregation & rules SIC Train A SIC Train B Non-SIC Train MV Power (1) (2) MV Power MV Power 30 cm LV Power LV Power LV Power 30 cm Non-Sensitive Non-Sensitive Non-Sensitive 30 cm Sensitive Sensitive Sensitive 30 cm Very-Sensitive Very-Sensitive Very-Sensitive Cabling rules (ITER_D_335VF9) Cable tray installation Cable installation EMC RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 24

25 Conclusion 1. Safe design (RCC-E) 2. Design following high-power industrial well-proven methods 3. Immunity & Emission control 4. Mesh-CBN outside cryostat 5. HF Shielding for diagnostics 6. Cable segregation Many fusion experiments with Single-Point-Earthing But largest fusion facilities Multi-Point-Earthing If wrong choice > 10 years of work after installation RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 25

26 Acknowledgments K. Armstrong S. Bazzoli A. Charoy RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 26

27 ITER Today RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 27

28 Thanks for your attention Any Question? RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 28