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Transformation of T9 Experimental Area: Repeatability Test and Radiation Measurements

Detailed report on repeatability test and radiation measurements for experimental area tables in T9, along with handling and transport procedures. Updates on phases and approvals in the HiRadMat project.

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Transformation of T9 Experimental Area: Repeatability Test and Radiation Measurements

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  1. T9 transformation • Repeatability test of experimental area tables (EDMS 1119840, Michael Lazzaroni) High Radiationto Materials WG3 – Experimental Area Ans Pardons– EN/MEF HiRadMat project Team Meeting 03/0/2011 Weekly WG3 meetings material: http://indico.cern.ch/categoryDisplay.py?categId=2616

  2. HiRadMat • January 2011: TBID dismounted • Dose rate inside collimator volume (1mx1mx1.2m) was measured (N. Conan): The 4 copper blocks: • Each bloc has “hottest surface” on the outside • Axis of bloc 2&3 is outside range of overhead crane • No remote handling foreseen (in 1993) Transformation of T9 Débit de dose télétector 12.01.11 40cm à l’extérieur des blocs : 20mSv/h 5 cm à l’extérieur des blocs : 60mSv/h 10-15 cm dans les blocs Cu: 430mSv/h Max obtenu (distance non estimée) : 1 Sv/h Ans Pardons EN/MEF

  3. HiRadMat • Axis of bloc 2&3 is outside range of overhead crane • Take 1&2 / 3&4 together • Use custom-made lifting beam • No remote handling foreseen • Use existing threaded holes (4 per block) • Handling plates must be installed on copper blocks • Hottest surface on the outside • Handling plates + extra shielding protect personnel when fixing plates • Blocs will be placed inside container in sarcophagus downstream TNC (40cm iron) Transformation of T9: downstream collimator Ans Pardons EN/MEF

  4. HiRadMat • Extensive tests on mock-up (S. Evrard) (carried out 02/02/2011, extensive report on EDMS1119840) Transformation of T9: downstream collimator Ans Pardons EN/MEF

  5. HiRadMat • Presentation in ALARA L3 committee of 17/1/2011 • Followed-up by “review” in the following week (M. Tavlet, P. Bonnal) • Extensive documentation (procedure, DIMR, risk analysis, ...) in EDMS for approval per phase Phases: • 0- Preparation area & tests • 1-Dismount and transport upsteram collimator & target • 2- move two upper copper blocs to downstream TNC • 3-move two lower copper blocs to downstream TNC and place all 4 blocks in containers inside sarcophagus • 4-5-6-7: Prepare area for receiving TED, install TED, close shielding Transformation of T9: ALARA approval Ans Pardons EN/MEF

  6. HiRadMat • Green light for phase 1 received 1/2/2011  roof block, target and collimator removed on 2/2/2011 Transformation of T9 Ans Pardons EN/MEF

  7. HiRadMat • Green light for phase 2 received 3/2/2011?  two upper copper blocks planned to be removed 3/2-5/2 (~18h of work) (situation on 5/2: shielding in place downstream from lower copper blocks) • Green light for phase 3?  two lower copper blocks removal & storage in closed sarcophagus (~20h of work) Then: phase 4 (~8h) – with last transport TNC TT61 Transformation of T9 Ans Pardons EN/MEF

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