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Vault-BL1A Shielding Plug

Vault-BL1A Shielding Plug. Sept 26, 2012 L.Lee. N. UCN Installation-1: 2014 Shutdown. Shielding “Plug” will need to be reconfigured. “Existing” Vault-BL1A Shielding Plug. CYCL. VAULT. BL1A. What is the required shielding “plug” thickness between the Vault & BL1A?

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Vault-BL1A Shielding Plug

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  1. Vault-BL1A Shielding Plug Sept 26, 2012 L.Lee

  2. N UCN Installation-1: 2014 Shutdown Shielding “Plug” will need to be reconfigured

  3. “Existing” Vault-BL1A Shielding Plug CYCL. VAULT BL1A What is the required shielding “plug” thickness between the Vault & BL1A? When UCN beamline (septum & dipole) is installed, the shielding “plug” between the Vault and BL1A tunnel will need to be reconfigured.

  4. Vault-BL1A/1U Shielding Plug BL1U CYCL. VAULT BL1A Footprint of the shielding plug will be reduced slightly. What are the requirements for the “new” shielding plug with BL1U installed? How thick does the “new” shielding plug need to be?

  5. Vault-BL1A/1U Shielding Requirements What are the requirements for the shielding “plug” with BL1U installed? (Preliminary discussions with A.Trudel) - Prompt Radiation Hazard (PRH) Study - Based on occupancy in 1A/1U tunnel with beam ON in vault:  Dose rate in accessible areas < 100 mSv/hr  Annual personnel dose limits from chronic losses < 1 mSv - Dose rate constraints for various accidental full beam loss scenarios (e.g. accidental insertion of 1A stripper, failure of 2AVB1 bender)  Dose rate outside shielding < 50 mSv/hr  Dose limit per full loss event < 1 mSv How thick does the “new” shielding need to be? - Based on dose rates from various scenarios mentioned above (PRH study, simulation studies, surveys/measurements) - Design to maintain overall effective thickness (rt ) in shielding “plug” Is a Shielding-Plug “Task Force” needed? Layout Option: Maintain effective thickness of shielding Replace some of the concrete w/ higher density mat’l

  6. Vault Elements

  7. Higher Density Shielding Materials Replacing some concrete blocks with higher density material Issues/Considerations: - Re-use existing concrete blocks, as much as possible Costs, Storage  fewer removed blocks (potentially activated) - Combine with denser (Steel) blocks - Combine with denser (Hematite-aggregate concrete) blocks Concrete/Hematite aggregate shielding blocks (from NSS) Variable/Customizable density (3.8 - 5.7 g/cc) Used at reactors (Ontario – 25 yrs), SNS, TRIUMF NSS has worked with Ellis-Don, Burnco, LaFarge NSS Meeting at TRIUMF on Sep.10, 2012 (M.Chopra) Layout Options (“First-Pass” study): (1) Replace some concrete w/ steel blocks (~3:1 thickness ratio) (2) Replace some concrete w/ aggregate blocks (~2:1 thickness ratio)

  8. Shielding Plug Layout: Option-1 Replace some concrete with steel blocks (~3:1 thickness ratio) “First-Pass” study using SolidWorks 3D-Model of Meson Hall West

  9. SolidWorks 3D-Model of Meson Hall West CYCL. VAULT BL1A TUNNEL

  10. Existing Shielding (Layers A-D) (UPPER LAYERS E-J HIDDEN) Immovable Block East (to T1, T2, TNF) Vault-1A “Plug” Beampipe to BL1A

  11. Existing Shielding (Layers A+B+C) (LAYER D & UPPER LAYERS E-J HIDDEN)

  12. Existing Shielding (Layer A+B) (LAYERS C+D & UPPER LAYERS E-J HIDDEN)

  13. Existing Shielding (Layer A) (LAYERS B+C+D & UPPER LAYERS E-J HIDDEN)

  14. “New” Shielding Layout (Layer A) “FIRST-PASS” STUDY : OPTION-1 (STEEL) Blue – steel, new Yellow – concrete, new (w/ cut-out)

  15. “New” Shielding Layout (Layer A+B) “FIRST-PASS” STUDY : OPTION-1 (STEEL) Blue – steel, new Yellow – concrete, new (w/ cut-out)

  16. “New” Shielding Layout (Layer A+B+C) “FIRST-PASS” STUDY : OPTION-1 (STEEL) Blue – steel, new Yellow – concrete, new (w/ cut-out)

  17. “New” Shielding Layout (Layer A+B+C+D) “FIRST-PASS” STUDY : OPTION-1 (STEEL) Blue – steel, new Yellow – concrete, new (w/ cut-out)

  18. Vault-1A Shielding Layout (Layers A-D) EXISTING vs “NEW” (OPTION-1, STEEL) List of “Removed” Concrete Blocks:List of “New” Blocks: (2) 12’ x 6’ x 4’ (Layer A, C) (5) 2’ x 3’ x 6’ steel (Layer A) (7) 2’ x 3’ x 6’ (Layer A) (1) 2’ x 3’ x 6’ steel* (Layer A) (1) 6’ x 3’ x 2’ (Layer C) (2) 2’ x 3’ x 6’ concrete* (Layer A) (5) 2’ x 3’ x 2’ (Layer D) (1) 6’ x 3’ x 2’ concrete* (Layer C) (6) 2’ x 3’ x 2’ steel (Layer D) (38% of existing) *block with “cut-out” for 1U beampipe

  19. Vault-1A Shielding Layout (Layers A-D) EXISTING vs “NEW” (OPTION-2, AGGREGATE) List of “Removed” Concrete Blocks:List of “New” Blocks: (2) 12’ x 6’ x 4’ (Layer A, C) (7) 2’ x 3’ x 6’ aggregate (Layer A) (6) 2’ x 3’ x 6’ (Layer A) (1) 2’ x 3’ x 6’ aggregate* (Layer A) (5) 6’ x 3’ x 2’ (Layer A, B, C) (2) 2’ x 3’ x 6’ concrete* (Layer A) (4) 2’ x 3’ x 2’ (Layer D) (1) 6’ x 3’ x 2’ concrete* (Layer C) (8) 2’ x 3’ x 2’ aggregate (Layer D) (42% of existing) *block with “cut-out” for 1U beampipe

  20. More Information on High-density Shielding Blocks from NSS (Nuclear Shielding Supplies)

  21. High Density Concrete w/ Aggregate Nuclear Shielding Supplies and Services (NSS) Concrete/Hematite aggregate shielding blocks – HD (3.8-5.7 g/cc) - Hematite (Fe2O3): Coarse [1” 3/8”] & Fine [3/8”  100 mesh] components Established history of use at reactors and accelerators -Ontario Hydro (20 yrs, P.Mukherjee: Study of long-term effect on HD concrete at reactors) - BNL AGS (ilmenite, roof beams: 33 ton, blocks: 21, 11, 0.5 – 2 ton) -SNS Tunnel (hematite, 3.85g/cc, poured in place, 2000 m3) - TRIUMF NSS has worked with Ellis-Don, Burnco, LaFarge Used in both radiation & non-radiation applications: - high density radiation shielding - linear accelerator vaults & treatment rooms - high dose rate HDR rooms - mass concrete projects - high density concrete applications columns - gravity seawall, coastal protection & breakwater structures - bridge counterweights - ballast for ocean vessels and off shore platforms - noise and vibration dampening Coarse Hematite Fine Hematite

  22. NSS HD-concrete (Non-radiation Applications) HD-concrete Back-spans Charles River Suspension Bridge in Boston, MA

  23. NSS HD-concrete (Non-radiation Applications) Breakwater Structure Utilizing High Density Concrete

  24. EXTRA

  25. Schedule( 2010-2016 ) 2015 2016 2014 2017 2011 2013 2012 ACTIVITY J A J O J A J O J A J O J A J A J O J A J O J A J O MILESTONES Activities Elsewhere (KEK, RCNP, CERN, Acsion) Shutdown Activities Non-Shutdown Activities UCN Schedule (Draft) 2015 2016 2014 2017 2011 2013 2012 MESON HALL (& Vault): Cleanup M11,1A/1B roof-beam Dismantle PIENU & M13-DS Dismantle M13-US, Mod.Shld Mod. 1VQ4/Q5; BL1V & Shld Design/Fabr Core M13 I-block BEAMLINE 1U: Kicker Design & Review Order/Fabricate/Deliver Install Kicker Ceramic Beamtube Design/Order Fabricate Install Septum Test Design & Review Order/Mod Install Dipole Test Order/Fabricate Install Beamline (incl Quads, PS,…) Test Install Design & Review Order/Fabricate UCN APPARATUS: Spallation Target & R/H Design/Order/Fabricate Test Specify/Conceptual design Install UCN Source Install/Test & Run @ RCNP Design/Fabricate UnInstall Test Install Shielding Install Install Design & Review Procure shielding blocks Install COMMISSION @ TRIUMF Beamline Commissioning UCN Source Commissioning HELIUM LIQUEFIER: He Liquefier System Procure/Install Upgrade He Liquefier System Procure Install

  26. N 2015 Non-Shutdown & 2016 Shutdown 2015 Shutdown 2014 Shutdown UCN Installation Schedule

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