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The Hydrogen Delivery System – An Introduction

The Hydrogen Delivery System – An Introduction. M Hills. In Block Diagram. Each Hydrogen Delivery System in MICE is designed to fill an Absorber with 22L of liquid hydrogen (~18000L (or 18m 3 ) of gas) in a controllable and safe manner.

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The Hydrogen Delivery System – An Introduction

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  1. The Hydrogen Delivery System – An Introduction M Hills

  2. In Block Diagram • Each Hydrogen Delivery System in MICE is designed to fill an Absorber with 22L of liquid hydrogen (~18000L (or 18m3) of gas) in a controllable and safe manner. • Prior to use with the final MICE absorbers, the system will be tested with a Test Cryostat which represents the final absorber (this is the “R&D system”)

  3. System Components

  4. In CAD Vacuum Pump Enclosure Relief lines Gas Panel Enclosure Fans Test Cryostat Ventilation ducts 4

  5. In photos • Gas Panel Enclosure is situated on the south mezzanine • Hydride Bed heater/chillers located along the mezzanine • Ventilation and vacuum pipework is routed above the magnetic shield wall • Test Cryostat sits at floor level, approximately in the eventual location of the third AFC module

  6. H2 Charging Station Hydrogen “Charging Station” (right) installed below south mezzanine Will provide a ventilated area for hydrogen bottles during the periods when the hydride beds are being filled Hydrogen bottles will only be brought into the hall during charging. This means for 1-2 days max. and (hopefully) once per bed.

  7. Hydrogen Local Control Room (HLCR) • Located adjacent to the main hall, opposite the MICE Local Control Room • Home to the Hydrogen System control racks: • one for control functions specific to the first system • one for general control functions (H2 detection and ventilation system) • Houses the UPS and battery rack to keep safety critical systems running during a power outage

  8. On the roof • Vacuum Pump Enclosure (left) houses the vacuum pumps and is ventilated by the two smaller fans in the fan stack (right) • Ventilation stack contains the fans and flow monitoring • The relief lines vent above the stack platform

  9. External Helium and Nitrogen Store 9 • Storage area for the nitrogen and helium bottle packs that serve the system • Final stage of construction still in progress • Gas panels for connection of the bottle packs have been manufactured and are ready to be fitted • Gas panels include regulators that allow for automatic switching between packs • Current estimate is that continuous purging of the relief lines with nitrogen will use ~1pack/week (with 3 systems) • With two packs of nitrogen in position and automatic changeover, there will be a week to replace a used pack during continuous running

  10. In reality... • Hall Tour: • Will visit all the areas described above • Hall is a CDM (Construction Design and Management) area and also a (very low) radiation area • PPE and radiation monitoring will be provided • Please stay with the guides and watch your step

  11. Latest news.......... • Matt Hills is taking a two-year career break – very best wishes from MICE • Stephen Watson of STFC assumes responsibility for LH2 system w.e.f October 17th • Successful pre-operation safety review held at RAL, expect formal report next few days • Minor pipework on bottle rack and vac system to do, but all major installations are complete • Very likely we can repeat LHe test and do LH2 test early in 2012 • Director-level safety responsibility (David Wark) has been established at RAL

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