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The MICE Hydrogen System Summary Tom Bradshaw, Yury Ivanyushenkov, Elwyn Baynham, Tony Jones, Mike Courthold and Matthew Hills Rutherford Appleton Laboratory.

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Presentation on theme: "The MICE Hydrogen System Summary Tom Bradshaw, Yury Ivanyushenkov, Elwyn Baynham, Tony Jones, Mike Courthold and Matthew Hills Rutherford Appleton Laboratory."— Presentation transcript:

1 The MICE Hydrogen System Summary Tom Bradshaw, Yury Ivanyushenkov, Elwyn Baynham, Tony Jones, Mike Courthold and Matthew Hills Rutherford Appleton Laboratory

2 There are two phases to the implementation of the hydrogen delivery system: R&D Phase where a single system is developed and tested on a test cryostat which represents an absorber. Implementation phase where the delivery system is matched to a real MICE absorber The objective of the R&D phase is to demonstrate a safe hydrogen delivery system for the absorber. This will consist of a first model MICE hydrogen delivery system together with a test cryostat that does not have thin windows but does contain the same instrumentation. Objectives of R&D

3 System Overview Gas Delivery System Hydride bed for gas storage Control Valves, pumps, alarms and indicators Buffer volume Control System Controllers Interface to the rest of MICE Test Cryostat Cryocooler Instrumentation Hydrogen volume Test Cryostat Gas Panel Vacuum System Exhaust Heater Chiller Hydride Bed Storage Buffer Volume Hydrogen Delivery Control System MICE Control System Extraction Hood Safety Relief

4 Safety Review Process We are here

5 Safety Review Contents 1.MICE Overview (Mike Zisman) 2.Introduction (Tom Bradshaw) 3.Process and Instrumentation Diagrams (Matthew Hills) 4.Control System (Mike Courthold) 5.Hall Infrastructure and R&D Cryostat (Tony Jones) 6.HAZOP and failure analysis (Yury Ivanyushenkov) 7.Summary (Tom Bradshaw) First walk through was held on the 21 st October – review items were collected and will be dealt with Need to produce the terms of reference for the review Need to produce a test plan

6 Current Activities Main activities are: The safety review R&D system is being detailed Process and instrumentation diagram has been revised Control system algorithms being developed

7 Cryostat Helium Store Gas Panel Venting Vac. Pumps Heater/ Chiller Unit Hydrogen Bottle System P&ID Pipework Identification

8 Process and instrumentation Identified supplierd for most of the components for the system e.g. relief valves, level indicators etc… Tyco (AG Series 90) Relief Valves –Pilot valves – quick acting –3% tolerance on set pressure –Closes at 95% of set pressure –Response time is <0.5s BS&B Low Pressure Reverse Buckling Disc –±5% tolerance on burst pressure –Vacuum/back pressure resistant Hand Valves can be locked off as necessary Also specified temperature sensors, pumps, pressure and vacuum gauges

9 Hydride Bed Original supplier is unable to provide anything We have found an alternative supplier in Austria – good specification and cheaper Supplier: TREIBACHER INDUSTRIE AG –The nominal figures for the absorption temperature is -10°C and +20°C for the evolution temperature. Heat Transfer Medium - Water / glycolMH Weight: 120 kg Tank Structure A hull with 7 inter-connected stainless-steel storage cylinders, each with internal coil for cooling/heating. Dimensions Ø370 mm × L1500 mm (not including attachments), horizontal position Tank Total Weight 260-280 kg Operating Conditions: –Charging Gas Component Hydrogen of 99.99% purity –Charging Gas Pressure 1.2-1.7 bar abs –Hydrogen Charging Rate Max 70 NL/min –Discharging Gas Pressure 1.0-7.0 bar abs

10 Control System The control system will be implemented in Labview for the R&D tests. Once the algorithms have been developed they will be incorporated into EPICS (Experimental Physics and Industrial Control System), which is the control system that has been chosen for the MICE experiment. Fortunately Labview possesses “Channel Access” capability, used by all EPICS clients, which will ease the subsequent transition to EPICS. EPICS can be installed under a wide range of operating systems on a wide range of hardware platforms (eg Unix, Linux, Windows, vxWorks). The IOCs (Input Output Controllers), are traditionally built from VME cards and the 68xxx microprocessor family, running vxWorks, but other hardware platforms and operating systems are now supported. No decision has yet been taken on the hardware platforms and operating systems to be employed by MICE for EPICS. The control system naturally has two interfaces: –Hydrogen Absorber Cryostat system –Hydrogen Delivery system

11 Control System Hydrogen Delivery system –Normal control of the Hydrogen Delivery system can be sub- divided as follows: Purging the delivery system with Helium; Filling the Hydrogen Absorber with liquid Hydrogen from the Hydride Bed; Maintaining the Hydrogen System in its normal running state; Emptying the Hydrogen Absorber and returning the Hydrogen back to the Hydride Bed. –Additionally it will be necessary to charge the Hydride Bed with Hydrogen at the outset, and following any maintenance on the Hydride Bed. –We are also developing the system to work with Helium

12 Control System – fill sequence Chiller on Set TS1_sp = TS1_initial PV2,3,5,7,14,17,18,19 closed CV4 closed PV1 open VP2 on, PV20 open Cooling System on Set TS2_sp = 15K Start Pressure Control Loop Start Vac Monitor Open PV2,3 Open CV4 TS1<TS1_sp And VG3<1mbar PG1  PG1_sp Close PV2&3 and CV4 Stop Pressure Control Loop Set TS1_sp = TS1_low Open PV5 LS1 > LS1_sp H2 System Ready Increment/Decrement TS1 Empty Sequence VG3<1mbar Vac monitor Pressure Control Yes No Yes NoYes No Fill Sequence No Yes Other algorithms have been developed

13 Implementation in the Hall Hope to have mezzanine in place for R&D tests

14 Implementation in the Hall R&D

15 R&D Test Cryostat Test cryostat will be sized to accommodate final absorbers.

16 HAZOP and FMECA HAZOP – HAZard and Operability assessment  This is a formalised safety assessment that is based on nodes in the Process and Instrumentation Diagram FMECA – Failure Modes Effect and Criticality Analysis  This does what it says Need to develop operational safety system Yury continues to develop these

17 Schedule Hydrogen delivery system review will take place 21 st 22 nd November Hydride bed will be ordered soon Cryostat – final details will be sorted out and will be ordered in the next month or so Aim is to test mid 2006

18 Summary  The hydrogen system is being developed through an R&D process – the end result will be the first MICE hydrogen delivery system  Many aspects of the safety have been considered through calculation, design and review  We have a well defined safety review process  Making progress on the control, gas handling and test cryostat  Start tests mid-2006

19 MICE Hydrogen System END


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