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PASI WP1

PASI WP1. PASI meeting April 2013 WP1 progress report D.M.Jenkins. PASI WP1. Review of existing and proposed targets for high power neutron production Review of spallation targets . PASI WP1. Review of existing and proposed targets for high power neutron production

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PASI WP1

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  1. PASI WP1 PASI meeting April 2013 WP1 progress report D.M.Jenkins

  2. PASI WP1 Review of existing and proposed targets for high power neutron production • Review of spallation targets

  3. PASI WP1 Review of existing and proposed targets for high power neutron production • Review of other neutron production targets

  4. PASI WP1 • Future work on requirements for example future high power neutron projects, e.g. neutron spallation, ADS, irradiation, etc

  5. PASI WP1 Candidate target materials • Rob Edgecock (RAL) and Stephen Brooks (ASTEC) developing list • New ways of using existing materials set – meta materials? • Ali Ahmad (Sheffield University) to set out ideas for figure of merit for materials too • Materials already in use or under study • Sample of TS1 tungsten clad in tantalum with David Armstrong (Oxford University) for micrograph initially • Eamonn Quinn (ISIS) has samples of hipped tantalum being analysed for oxygen content at Oxford Science Park • Possible new materials and selection for further study • ISIS reviewing the use of molybdenum in conjunction with tungsten as a flux trap target • Chris Densham’s Group (RHPTG) and Steve Roberts Group (Oxford University) and the RadiATE collaboration

  6. PASI WP1 • Limits of targets vsrequirements • David Jenkins to set out ISIS target design philosophy • Maximum operating temperatures and cooling rates • Chris Densham Group (RHPTG) analysis of ISIS TS1 and TS2 target cooling • David Jenkins (ISIS) review of existing CHF and BO curves used in ISIS design • Ali Ahmad (Sheffield University) to review CHF and BO source material • Roger Bennett (RAL) reviewing Binary Ice cooling and possible test programme • Existing data on tensile strength as a function of temperature • Results from PSI SINQ Target Irradiation Programme (STIP) – need pulling together perhaps? • Roger Bennett (RAL) to look at using his pulsed hot wire rig to add to existing data set but at lower temperatures • David Jenkins / Shu Yan Zhang (ISIS) carrying out measurement of residual strain in hipped TS1 target block on Engin-X soon • Other sources of data, specialist databases and supplier data

  7. PASI WP1 • Limits of targets vs requirements continued • Measurement of tensile strength for candidates using RAL test rig(s) • Eamonn Quinn (ISIS) - tensile tests carried out by test house on hipped tantalum • results presented at IWSMT Ghent. • Further tensile and fatigue tests planned soon

  8. PASI WP1 • Limits of targets vs requirements continued • Study of erosion/corrosion rates of target and target cladding materials. • Leslie Jones (ISIS) presented case of TS2 mkI target cladding failure and recovery at IWSMT Ghent • Tristan Davenne/Otto Caretta (RHPTG) planning water jet erosion on hipped tantalum samples and cvd tantalum (Tantaline) • Eamonn Quinn (ISIS) – starting to review ISIS TS2 target cooling water conductivity changes ISIS Second Target StationTantalum Cladding Corrosion Problem and Resolution Leslie Jones November 2012

  9. PASI WP1 • Study/development of novel target condition monitoring systems • Roger Bennett (RAL) has proposed using thermal imaging via a fibre optic to monitor target temperatures • Assessment of lifetime due to radiation • Study of existing radiation damage measurements and limits • Stephen Brooks (ASTEC) investigating simulation of dpa and gas production from MARS code • Future work to identification of materials for which further radiation damage studies are necessary

  10. PASI WP1 • Radiation damage studies at an existing facility • Investigation of ISIS tantalum clad tungsten target with ~12 dpa • Roger Bennett (RAL) has presented poster at IWSMT in Ghent • Roger has opened communications with SCK CEN at Mol Belgium re cutting up target and testing too • Existing data from ISIS tantalum target with ~11 dpa which was cut up and investigated in the late 1990s

  11. PASI WP1 • Future work on: • Neutron capture and delivery • Review of existing and planned systems • Identify possible improvements for new systems • Shielding, remote handling, disposal, etc, aspects of targets, to be reviewed throughout studies

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