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Cryogenic test stand and Coupler cooling pressure

Cryogenic test stand and Coupler cooling pressure. Bertrand RENARD CEA. ESS Cryomodule status meeting 2013 January 09 Lund. CRYOMODULE TEST STAND. Existing cold box, Dewar and pumping line (red) New Dewar, valve box and pumping line in common for ESS (2 K) and Ifmif (4.5 K) (blue).

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Cryogenic test stand and Coupler cooling pressure

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  1. Cryogenic test stand and Coupler cooling pressure Bertrand RENARD CEA ESS Cryomodule status meeting 2013 January 09 Lund

  2. CRYOMODULE TEST STAND • Existing cold box, Dewar and pumping line (red) • New Dewar, valve box and pumping line in common for ESS (2 K) and Ifmif (4.5 K) (blue) page

  3. Dewar Valve Box > 1,2 m CRYOMODULE TEST STAND

  4. CRYOMODULE TEST STAND • Cryogenicequipmentforeseen LHe Transfer line (instead of SHe) LN2 Transfer line (instead of 50 K He) Dewar with LHe PhS Valve box with LN2 PhS and 2 K heatexchanger VLP Return line Electricalheater for VLP line Control valves and instrumentation • Information required Cryomodule geometry Cryomodule interfaces Choice of 2 K heatexchanger position page

  5. COUPLER COOLING PRESSURE • Inlet circuit at 3 bar Inlet valve more simple if circuit canbefedwith 3 bars. • Safetyrules High pressure He alreadypresentinside Cryomodule thermal shields. • Circulation More pressure availableis best for He circulation, but regulation valve has to takeintoaccount max inlet pressure. No more risk of LHe presenceat coupler inlet. page

  6. COUPLER COOLING PRESSURE z • Pressure safetypreliminarycalculation Von Mises stress frommostunfavorablecalculation shows 16 MPa for thin 1 mm external tube, with a yield stress of 200 MPa. 1 order of magnitude mechanicalmargin CEA approves 3 bar for nominal pressure inox 1 mm diam 100 mm Pression 3 bars page

  7. Merci ! Bertrand RENARD CEA ESS Cryomodule status meeting 2013 January 09 Lund

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