1. UCN Facility Working Group October 3, 2012 OverviewL.Lee MCNPX and ShieldingP.Carlson Beam MonitorsC.A.Davis / A.Konaka

2. UCN Facility Working Group October 3, 2012 OverviewL.Lee - Schedule & 2014 Shutdown - Decisions about beamline configurations - High-density shielding (Vault-1A “Plug”, UCN Pyramid) - Shielding needs (Monte Carlo studies) MCNPX and ShieldingP.Carlson Beam MonitorsC.A.Davis / A.Konaka

3. 2011 2015 2014 2013 2012 2016 2017 ACTIVITY J A J O J A Schedule( 2010-2016 ) 2011 2015 2014 2013 2012 2016 2017 Cleanup M11,1A/1B roof-beam Dismantle PIENU & M13-DS MESON HALL (& Vault): Core M13 I-block Shielding UCN APPARATUS: Spallation Target & R/H UCN Source BEAMLINE 1U: Kicker Septum Dipole Beamline (incl Quads, PS,…) Design & ReviewOrder/Fabricate/Deliver Test Order/Mod Order/Fabricate Design & Review Order/Fabricate InstallTest Specify/Conceptual design Design/FabricateInstallUnInstall Procure shielding blocksDesign & Review Install COMMISSION @ TRIUMF Beamline Commissioning HELIUM LIQUEFIER: Upgrade He Liquefier System He Liquefier System Procure UCN Source Commissioning Install/Test & Run @ RCNP Procure/Install Install Kicker Ceramic Beamtube Install Design/OrderFabricate Install Test MILESTONES Shutdown Activities Activities Elsewhere (KEK, RCNP, CERN, Acsion) Non-Shutdown Activities Mod. 1VQ4/Q5; BL1V & Shld Install Dismantle M13-US, Mod.Shld UCN Schedule (Draft) Design/Order/FabricateTest Install Design/Fab r

4. N Kick direction (vertical or horizontal) Shielding “Plug” will need to be reconfigured UCN Installation 2014

5. Decisions about beamline configurations

6. Transporting the split beam from the kicker through the existing beam apertures

9. UCN Installation 2015 (Option 3f) N T1 study

10. UCN Installation 2015 (Option 3g) N T1 study

11. High-density Shielding

12. 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

13. 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)

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

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

16. 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 Vault-1A Shielding Layout (Layers A-D) EXISTING vs “NEW” (OPTION-1, STEEL)

17. 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 Vault-1A Shielding Layout (Layers A-D) EXISTING vs “NEW” (OPTION-2, AGGREGATE)

18. High Density Concrete w/ Aggregate Nuclear Shielding Supplies and Services (NSS) Concrete/Hematite aggregate shielding blocks – HD (3.8-5.7 g/cc) - Hematite (Fe 2 O 3 ): 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 m 3 ) - 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

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

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

21. UCN Installation 2015/2016 (Option 3f) N High-density Non-magnetic Shielding Dose Limit: 3  Sv/h outside of shielding

22. EXTRA

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

24. Optics Studies

25. 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  Sv/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 (   t ) 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

26. Vault Elements

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

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

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

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

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