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HRMT#6 – TPSG4 Safety review

HRMT#6 – TPSG4 Safety review. J. Borburgh. With input from: C . Baud, D. Brethoux, M. Delonca, B. Goddard. Outline. TPSG4 experiment Technical description Preparation & Installation Operation phases Post-irradiation and Disposal Hazards Risk analysis Conclusions.

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HRMT#6 – TPSG4 Safety review

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  1. HRMT#6 – TPSG4Safety review J. Borburgh With input from: C. Baud, D. Brethoux, M. Delonca, B. Goddard

  2. Outline • TPSG4 experiment • Technical description • Preparation & Installation • Operation phases • Post-irradiation and Disposal • Hazards • Risk analysis • Conclusions TPSG4 test at HRMT#6

  3. Purpose of TPSG4 Protect Magnetic septa in SPS LSS4 extraction channel from damage by the beam in case of beam mis-steering or kicker fault. • Protect MSE copper coil from being deformed → ΔT <80 K • Limit water pressure rise in cooling channels of MS coil ΔP < 50 bar (→ Δtwater MSE coil< 15 K)

  4. TPSG4 beam diluter CZ5 CfC1.75 Ti 6Al 4V 3100 mm long diluter, with graphite CZ5, CfC, Titanium alloy (TA6V), and a Nickel based alloy (Inconel). Designed to protect MSE against impact of 450 GeV beam (total intensity: 4.9 1013, time structure: 25ns x 72 x 4 ) INCO718 Phase 2 Need beam test to see how this fails

  5. Scientific Motivation • To test equipment under the worst case conditions it may encounter in case of full beam impact • To validate the diluting materials used in TPSG4 • To demonstrate the MSE is properly protected by TPSG4 • To benchmark advanced numerical simulations TPSG4 test at HRMT#6

  6. Test specifications • Required test conditions: • TPSG4 and MSE under vacuum (10-8 mbar), • Cooling circuit of MSE coil under pressure (22 bar), • Beam Loss Monitoring • Cooling requirements between shots: • Cooling of TPSG4: connected to HRMT supply of ΔP=7 bar (expected flow of ~3 l/min) • Cooling of MSE: connected to HRMT supply of ΔP=7 bar (expected flow of ~47 l/min) • Real time data acquisition (vacuum, water pressure, flow rate, water circuit temperature, yoke temperature, BLM signals) TPSG4 test at HRMT#6

  7. Beam requirements • Beam energy: 450GeV • Bunch spacing: 25ns • Proton/Bunch: 1,2e+11 • Beam size: 0,5mmx0,5mm • Total time: 1 week TPSG4 test at HRMT#6

  8. Pre-assembly in building 867 (September – October) • Vacuum: gauges/primary pump on TPSG4 + MSE, beam line windows in Beryllium with C/C reinforcements (design M. Delonca EN/STI) • Hydraulic: pressure device, flow meter, temperature gauges • Survey: target alignment • Mechanical: assembly of lifting jig with counter weights • Validation: Lifting test TPSG4 test at HRMT#6

  9. Transport to BA7/TNC tunnel • Modified support feet for TPSG4/MSE • Optimization for transport: yokes locked in position, VPI blocked, bellows blocked • Transport procedure: lifting jigs, centre of gravity checked, transport trailer, … TPSG4 MSE TPSG4 test at HRMT#6

  10. Installation MSE • Support feet installation: using special braces on crane • Dedicated lifting jigs are installed onto the tanks, manual installation. TPSG4 test at HRMT#6

  11. Installation of TPSG4 TPSG4 test at HRMT#6

  12. Test set-upoverview Beam Catia rendering of final installation TPSG4 test at HRMT#6

  13. Hydraulic installation TPSG4 test at HRMT#6

  14. Installation sequence (planned for week 46) • Transport to BA7/TNC tunnel: 1/2 day • Modified support feet for TPSG4/MSE • Optimization for transport: yokes locked in position, VPI blocked, bellows blocked • Transport procedure: lifting jigs, centre of gravity checked, transport trailer, … • Installation of the experiment: 1 day • Mechanical support installation: special braces will be used on crane • Tank installation: special braces used on crane, dedicated lifting jig with counter weights for tanks • First manual installation of the MSE tank, followed by the TPSG4 • Finalize assembly: 3 days • Survey • Vacuum: leak test performed on the assembly • Hydraulic assembly: static pressure system on MSE (22 bar), dynamic circuit (7 bar) on TPSG4 • Installation of data acquisition systems (BLM, etc…..) • Installation validation: 1/2 day TPSG4 test at HRMT#6

  15. Test phases • Test run: week 47 (19 – 23 November) • Expected experiment duration: 1 full week • At least two people from the experimental team present in the CR during all phases of the experiment set-up and test run (TE/ABT, BE/BI) • In principle no access request is planned during tests • After the experiment: equipment remains in test area to allow the activation to decrease to an acceptable level (last experiment before LS1) TPSG4 test at HRMT#6

  16. Post-irradiation phase • After irradiation, the following analysis are foreseen: • Direct observation and in-situ measurements of MSE coil and TPSG4 diluter after dismantling (thanks to quick-disconnection flange). • Transport to 867 workshop once radiation levels have become acceptable (April 2013). • Damage inspection and dismantling followed by refurbishment of irradiated equipment. TPSG4 test at HRMT#6

  17. Hazard Inventory • Pressure: • Max. static pressure ~80 bar MSE coil • Max. dynamic pressure ~22 bar TPSG4 coil • Tank TPSG4 volume ~ 1.01 m3, tank MSE volume ~1,25 m3 • Vacuum: 10-8 mbar • Temperature: • ΔT on the TPSG4 coil ~700K • ΔT on the MSE coil ~8 K • Electricity: • 220 Von hydraulic electro-valves, up to 6kV on ion pumps • Ionizing radiation: • Particle type: protons • Pulse intensity: up to 288 bunches, 1.2E11 p/b • Beam energy: 450 GeV TPSG4 test at HRMT#6

  18. Radiological risk • Theoretical residual dose rate after 4 months: < 20 µSv/h à 40cm (C. Theis) • Dismantling of experiment at HRMT: April 2013 • Same procedure for transport from TNC/BA7 to 955 or 867 • Workshop 867 for refurbishment of the TPSG4 and MSE Max. 500 uSv/h inside diluter block (~80 cm from front face) 4 months TPSG4 test at HRMT#6

  19. Risk analysis • A hazard analysis is established separately for installation, test and dismantling of the set-up, and is accessible in the EDMS document page of the safety file. TPSG4 test at HRMT#6

  20. Conclusions • Mechanical design of test completed • Additional lifting braces being manufactured • Special support feet being manufactured • Lifting jig being manufactured • Transport chassis’ re-designed after review with transport team and ordered • Beam windows ordered • TPSG4 and MSE tanks presently being prepared in 867 • Risk inventory edited • Installation period extremely short TPSG4 test at HRMT#6

  21. Present situation in building 867 TPSG4 test at HRMT#6

  22. Back-up slides TPSG4 – preliminary post-irradiation dose rate estimates C. Theis / DGS-RP

  23. FLUKA simulation Inco 718 (3 x 1.9 x 30 cm) Titanium (3 x 1.9 x 30 cm) Simplified geometry: Graphite blocks (3 x 1.9 x 240 cm) Iron yoke Beam Protons @ 440 GeV 2E14 spread over 1 hour

  24. Residual dose rate 8 hours 1 hour

  25. Residual dose rate 1 day 1 week

  26. Residual dose rate Max. 500 uSv/h inside diluter block (~80 cm from front face) 1 month 4 months

  27. Back to radiological risk slide TPSG4 test at HRMT#6

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